From 31fb55adf3efbba04e0ecf5242ee73fe3d6aaa1a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=BA=8C=E8=B4=A7=E6=9C=BA=E5=99=A8=E4=BA=BA?=
 <smith3816@gmail.com>
Date: Fri, 11 Feb 2022 15:02:59 +0800
Subject: [PATCH] chore: btn default provide default cls (#34013)

---
 .../__snapshots__/demo-extend.test.ts.snap    |   2 +-
 .../__tests__/__snapshots__/demo.test.ts.snap |   2 +-
 .../__snapshots__/demo-extend.test.ts.snap    |   4 +-
 .../__tests__/__snapshots__/demo.test.ts.snap |   4 +-
 .../__snapshots__/demo-extend.test.ts.snap    |   6 +-
 .../__tests__/__snapshots__/demo.test.js.snap |   6 +-
 .../__snapshots__/demo-extend.test.ts.snap    |  10 +-
 .../__tests__/__snapshots__/demo.test.js.snap |  10 +-
 .../__snapshots__/demo-extend.test.ts.snap    |   6 +-
 .../__tests__/__snapshots__/demo.test.js.snap |   6 +-
 .../__snapshots__/demo-extend.test.ts.snap    |  66 ++---
 .../__tests__/__snapshots__/demo.test.ts.snap |  66 ++---
 .../__snapshots__/index.test.tsx.snap         |  36 +--
 components/button/button.tsx                  |   4 +-
 .../__snapshots__/index.test.js.snap          |   2 +-
 .../__snapshots__/components.test.js.snap     |  96 +++----
 .../config-provider/__tests__/index.test.js   |   6 +-
 .../__snapshots__/DrawerEvent.test.js.snap    |   2 +-
 .../__snapshots__/demo-extend.test.ts.snap    |  46 ++--
 .../__tests__/__snapshots__/demo.test.js.snap |  46 ++--
 .../dropdown-button.test.js.snap              |   8 +-
 .../__snapshots__/demo-extend.test.ts.snap    |  18 +-
 .../__tests__/__snapshots__/demo.test.js.snap |  18 +-
 .../__snapshots__/Search.test.js.snap         |  14 +-
 .../__snapshots__/demo-extend.test.ts.snap    |  24 +-
 .../__tests__/__snapshots__/demo.test.js.snap |  24 +-
 .../__snapshots__/index.test.js.snap          | 260 +++++++++---------
 .../__snapshots__/demo-extend.test.ts.snap    |   2 +-
 .../__tests__/__snapshots__/demo.test.js.snap |   2 +-
 .../__snapshots__/demo-extend.test.ts.snap    |  14 +-
 .../__tests__/__snapshots__/demo.test.js.snap |  14 +-
 .../__snapshots__/Modal.test.js.snap          |   4 +-
 .../__snapshots__/demo-extend.test.ts.snap    |  28 +-
 .../__tests__/__snapshots__/demo.test.js.snap |  28 +-
 .../__snapshots__/demo-extend.test.ts.snap    |   8 +-
 .../__tests__/__snapshots__/demo.test.js.snap |   8 +-
 .../__snapshots__/demo-extend.test.ts.snap    |  22 +-
 .../__tests__/__snapshots__/demo.test.js.snap |  22 +-
 .../__snapshots__/demo-extend.test.ts.snap    |  60 ++--
 .../__tests__/__snapshots__/demo.test.js.snap |  24 +-
 .../__snapshots__/index.test.js.snap          |   6 +-
 .../__snapshots__/demo-extend.test.ts.snap    |  36 +--
 .../__tests__/__snapshots__/demo.test.js.snap |  36 +--
 .../__snapshots__/demo-extend.test.ts.snap    |   8 +-
 .../__tests__/__snapshots__/demo.test.js.snap |   8 +-
 .../__snapshots__/demo-extend.test.ts.snap    |   4 +-
 .../__tests__/__snapshots__/demo.test.js.snap |   4 +-
 .../__snapshots__/demo-extend.test.ts.snap    |   2 +-
 .../__tests__/__snapshots__/demo.test.js.snap |   2 +-
 .../__snapshots__/demo-extend.test.ts.snap    |   2 +-
 .../__tests__/__snapshots__/demo.test.js.snap |   2 +-
 .../__snapshots__/demo-extend.test.ts.snap    |  60 ++--
 .../__tests__/__snapshots__/demo.test.js.snap |  54 ++--
 .../__snapshots__/demo-extend.test.ts.snap    |  14 +-
 .../__tests__/__snapshots__/demo.test.js.snap |  14 +-
 .../__snapshots__/demo-extend.test.ts.snap    |  16 +-
 .../__tests__/__snapshots__/demo.test.js.snap |   6 +-
 .../__snapshots__/demo-extend.test.ts.snap    |   8 +-
 .../__tests__/__snapshots__/demo.test.js.snap |   8 +-
 .../__snapshots__/demo-extend.test.ts.snap    |   2 +-
 .../__tests__/__snapshots__/demo.test.js.snap |   2 +-
 .../__snapshots__/demo-extend.test.ts.snap    |  66 ++---
 .../__tests__/__snapshots__/demo.test.js.snap |  66 ++---
 .../__snapshots__/tooltip.test.js.snap        |   2 +-
 .../__snapshots__/demo-extend.test.ts.snap    |   4 +-
 .../__tests__/__snapshots__/demo.test.js.snap |   4 +-
 .../__snapshots__/demo-extend.test.ts.snap    |   2 +-
 .../__tests__/__snapshots__/demo.test.js.snap |   2 +-
 .../__snapshots__/demo-extend.test.ts.snap    |  32 +--
 .../__tests__/__snapshots__/demo.test.js.snap |  32 +--
 70 files changed, 766 insertions(+), 766 deletions(-)

diff --git a/components/affix/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/affix/__tests__/__snapshots__/demo-extend.test.ts.snap
index 82f95baa2d..a77adba253 100644
--- a/components/affix/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/affix/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -71,7 +71,7 @@ exports[`renders ./components/affix/demo/on-change.md extend context correctly 1
     class=""
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
diff --git a/components/affix/__tests__/__snapshots__/demo.test.ts.snap b/components/affix/__tests__/__snapshots__/demo.test.ts.snap
index 0c5f62d39f..fca263f7d5 100644
--- a/components/affix/__tests__/__snapshots__/demo.test.ts.snap
+++ b/components/affix/__tests__/__snapshots__/demo.test.ts.snap
@@ -71,7 +71,7 @@ exports[`renders ./components/affix/demo/on-change.md correctly 1`] = `
     class=""
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
diff --git a/components/alert/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/alert/__tests__/__snapshots__/demo-extend.test.ts.snap
index 8bb521e594..fc0e64ba1d 100644
--- a/components/alert/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/alert/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -118,7 +118,7 @@ Array [
       class="ant-alert-action"
     >
       <button
-        class="ant-btn ant-btn-sm ant-btn-dangerous"
+        class="ant-btn ant-btn-default ant-btn-sm ant-btn-dangerous"
         type="button"
       >
         <span>
@@ -954,7 +954,7 @@ Array [
 
 exports[`renders ./components/alert/demo/error-boundary.md extend context correctly 1`] = `
 <button
-  class="ant-btn ant-btn-dangerous"
+  class="ant-btn ant-btn-default ant-btn-dangerous"
   type="button"
 >
   <span>
diff --git a/components/alert/__tests__/__snapshots__/demo.test.ts.snap b/components/alert/__tests__/__snapshots__/demo.test.ts.snap
index d8b7f5f609..8e0d375fe3 100644
--- a/components/alert/__tests__/__snapshots__/demo.test.ts.snap
+++ b/components/alert/__tests__/__snapshots__/demo.test.ts.snap
@@ -118,7 +118,7 @@ Array [
       class="ant-alert-action"
     >
       <button
-        class="ant-btn ant-btn-sm ant-btn-dangerous"
+        class="ant-btn ant-btn-default ant-btn-sm ant-btn-dangerous"
         type="button"
       >
         <span>
@@ -954,7 +954,7 @@ Array [
 
 exports[`renders ./components/alert/demo/error-boundary.md correctly 1`] = `
 <button
-  class="ant-btn ant-btn-dangerous"
+  class="ant-btn ant-btn-default ant-btn-dangerous"
   type="button"
 >
   <span>
diff --git a/components/auto-complete/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/auto-complete/__tests__/__snapshots__/demo-extend.test.ts.snap
index 61727a2d0c..6bedc29b73 100644
--- a/components/auto-complete/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/auto-complete/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -129,7 +129,7 @@ exports[`renders ./components/auto-complete/demo/certain-category.md extend cont
             class="ant-input-group-addon"
           >
             <button
-              class="ant-btn ant-btn-lg ant-btn-icon-only ant-input-search-button"
+              class="ant-btn ant-btn-default ant-btn-lg ant-btn-icon-only ant-input-search-button"
               type="button"
             >
               <span
@@ -1395,7 +1395,7 @@ exports[`renders ./components/auto-complete/demo/form-debug.md extend context co
                         class="ant-input-group-addon"
                       >
                         <button
-                          class="ant-btn ant-btn-icon-only ant-input-search-button"
+                          class="ant-btn ant-btn-default ant-btn-icon-only ant-input-search-button"
                           type="button"
                         >
                           <span
@@ -1618,7 +1618,7 @@ exports[`renders ./components/auto-complete/demo/form-debug.md extend context co
                         class="ant-input-group-addon"
                       >
                         <button
-                          class="ant-btn ant-btn-icon-only ant-input-search-button"
+                          class="ant-btn ant-btn-default ant-btn-icon-only ant-input-search-button"
                           type="button"
                         >
                           <span
diff --git a/components/auto-complete/__tests__/__snapshots__/demo.test.js.snap b/components/auto-complete/__tests__/__snapshots__/demo.test.js.snap
index a85b5c4a56..a8fb956f8c 100644
--- a/components/auto-complete/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/auto-complete/__tests__/__snapshots__/demo.test.js.snap
@@ -101,7 +101,7 @@ exports[`renders ./components/auto-complete/demo/certain-category.md correctly 1
             class="ant-input-group-addon"
           >
             <button
-              class="ant-btn ant-btn-lg ant-btn-icon-only ant-input-search-button"
+              class="ant-btn ant-btn-default ant-btn-lg ant-btn-icon-only ant-input-search-button"
               type="button"
             >
               <span
@@ -751,7 +751,7 @@ exports[`renders ./components/auto-complete/demo/form-debug.md correctly 1`] = `
                         class="ant-input-group-addon"
                       >
                         <button
-                          class="ant-btn ant-btn-icon-only ant-input-search-button"
+                          class="ant-btn ant-btn-default ant-btn-icon-only ant-input-search-button"
                           type="button"
                         >
                           <span
@@ -900,7 +900,7 @@ exports[`renders ./components/auto-complete/demo/form-debug.md correctly 1`] = `
                         class="ant-input-group-addon"
                       >
                         <button
-                          class="ant-btn ant-btn-icon-only ant-input-search-button"
+                          class="ant-btn ant-btn-default ant-btn-icon-only ant-input-search-button"
                           type="button"
                         >
                           <span
diff --git a/components/avatar/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/avatar/__tests__/__snapshots__/demo-extend.test.ts.snap
index 30e3a5ee8e..303b950a16 100644
--- a/components/avatar/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/avatar/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -294,7 +294,7 @@ Array [
     </span>
   </span>,
   <button
-    class="ant-btn ant-btn-sm"
+    class="ant-btn ant-btn-default ant-btn-sm"
     style="margin:0 16px;vertical-align:middle"
     type="button"
   >
@@ -303,7 +303,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-sm"
+    class="ant-btn ant-btn-default ant-btn-sm"
     style="vertical-align:middle"
     type="button"
   >
@@ -869,7 +869,7 @@ exports[`renders ./components/avatar/demo/responsive.md extend context correctly
 exports[`renders ./components/avatar/demo/toggle-debug.md extend context correctly 1`] = `
 Array [
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -877,7 +877,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -885,7 +885,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
diff --git a/components/avatar/__tests__/__snapshots__/demo.test.js.snap b/components/avatar/__tests__/__snapshots__/demo.test.js.snap
index a735a4450d..35de4011c2 100644
--- a/components/avatar/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/avatar/__tests__/__snapshots__/demo.test.js.snap
@@ -294,7 +294,7 @@ Array [
     </span>
   </span>,
   <button
-    class="ant-btn ant-btn-sm"
+    class="ant-btn ant-btn-default ant-btn-sm"
     style="margin:0 16px;vertical-align:middle"
     type="button"
   >
@@ -303,7 +303,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-sm"
+    class="ant-btn ant-btn-default ant-btn-sm"
     style="vertical-align:middle"
     type="button"
   >
@@ -548,7 +548,7 @@ exports[`renders ./components/avatar/demo/responsive.md correctly 1`] = `
 exports[`renders ./components/avatar/demo/toggle-debug.md correctly 1`] = `
 Array [
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -556,7 +556,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -564,7 +564,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
diff --git a/components/badge/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/badge/__tests__/__snapshots__/demo-extend.test.ts.snap
index daecbe9d20..1a4caa717d 100644
--- a/components/badge/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/badge/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -121,7 +121,7 @@ Array [
     class="ant-btn-group"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span
@@ -145,7 +145,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span
@@ -173,7 +173,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span
diff --git a/components/badge/__tests__/__snapshots__/demo.test.js.snap b/components/badge/__tests__/__snapshots__/demo.test.js.snap
index 34f6f6672f..6a382dc7e6 100644
--- a/components/badge/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/badge/__tests__/__snapshots__/demo.test.js.snap
@@ -121,7 +121,7 @@ Array [
     class="ant-btn-group"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span
@@ -145,7 +145,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span
@@ -173,7 +173,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span
diff --git a/components/button/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/button/__tests__/__snapshots__/demo-extend.test.ts.snap
index e9f3f099cd..ce9310f0bf 100644
--- a/components/button/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/button/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -11,7 +11,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -57,7 +57,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-block"
+    class="ant-btn ant-btn-default ant-btn-block"
     type="button"
   >
     <span>
@@ -94,7 +94,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-dangerous"
+    class="ant-btn ant-btn-default ant-btn-dangerous"
     type="button"
   >
     <span>
@@ -149,7 +149,7 @@ Array [
   </button>,
   <br />,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -157,7 +157,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     disabled=""
     type="button"
   >
@@ -221,7 +221,7 @@ Array [
   </button>,
   <br />,
   <button
-    class="ant-btn ant-btn-dangerous"
+    class="ant-btn ant-btn-default ant-btn-dangerous"
     type="button"
   >
     <span>
@@ -229,7 +229,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-dangerous"
+    class="ant-btn ant-btn-default ant-btn-dangerous"
     disabled=""
     type="button"
   >
@@ -277,7 +277,7 @@ Array [
     class="site-button-ghost-wrapper"
   >
     <button
-      class="ant-btn ant-btn-background-ghost"
+      class="ant-btn ant-btn-default ant-btn-background-ghost"
       type="button"
     >
       <span>
@@ -285,7 +285,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn ant-btn-background-ghost"
+      class="ant-btn ant-btn-default ant-btn-background-ghost"
       disabled=""
       type="button"
     >
@@ -310,7 +310,7 @@ exports[`renders ./components/button/demo/ghost.md extend context correctly 1`]
     </span>
   </button>
   <button
-    class="ant-btn ant-btn-background-ghost"
+    class="ant-btn ant-btn-default ant-btn-background-ghost"
     type="button"
   >
     <span>
@@ -339,7 +339,7 @@ exports[`renders ./components/button/demo/ghost.md extend context correctly 1`]
 exports[`renders ./components/button/demo/icon.md extend context correctly 1`] = `
 Array [
   <button
-    class="ant-btn ant-btn-primary ant-btn-circle ant-btn-icon-only"
+    class="ant-btn ant-btn-circle ant-btn-primary ant-btn-icon-only"
     type="button"
   >
     <span
@@ -387,7 +387,7 @@ Array [
     </div>
   </div>,
   <button
-    class="ant-btn ant-btn-primary ant-btn-circle"
+    class="ant-btn ant-btn-circle ant-btn-primary"
     type="button"
   >
     <span>
@@ -422,7 +422,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-circle ant-btn-icon-only"
+    class="ant-btn ant-btn-circle ant-btn-default ant-btn-icon-only"
     type="button"
   >
     <span
@@ -470,7 +470,7 @@ Array [
     </div>
   </div>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span
@@ -498,7 +498,7 @@ Array [
   </button>,
   <br />,
   <button
-    class="ant-btn ant-btn-circle ant-btn-icon-only"
+    class="ant-btn ant-btn-circle ant-btn-default ant-btn-icon-only"
     type="button"
   >
     <span
@@ -546,7 +546,7 @@ Array [
     </div>
   </div>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span
@@ -573,7 +573,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-dashed ant-btn-circle ant-btn-icon-only"
+    class="ant-btn ant-btn-circle ant-btn-dashed ant-btn-icon-only"
     type="button"
   >
     <span
@@ -648,7 +648,7 @@ Array [
     </span>
   </button>,
   <a
-    class="ant-btn ant-btn-icon-only"
+    class="ant-btn ant-btn-default ant-btn-icon-only"
     href="https://www.google.com"
   >
     <span
@@ -674,7 +674,7 @@ Array [
   <br />,
   <br />,
   <button
-    class="ant-btn ant-btn-primary ant-btn-circle ant-btn-lg ant-btn-icon-only"
+    class="ant-btn ant-btn-circle ant-btn-primary ant-btn-lg ant-btn-icon-only"
     type="button"
   >
     <span
@@ -722,7 +722,7 @@ Array [
     </div>
   </div>,
   <button
-    class="ant-btn ant-btn-primary ant-btn-circle ant-btn-lg"
+    class="ant-btn ant-btn-circle ant-btn-primary ant-btn-lg"
     type="button"
   >
     <span>
@@ -757,7 +757,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-circle ant-btn-lg ant-btn-icon-only"
+    class="ant-btn ant-btn-circle ant-btn-default ant-btn-lg ant-btn-icon-only"
     type="button"
   >
     <span
@@ -805,7 +805,7 @@ Array [
     </div>
   </div>,
   <button
-    class="ant-btn ant-btn-lg"
+    class="ant-btn ant-btn-default ant-btn-lg"
     type="button"
   >
     <span
@@ -833,7 +833,7 @@ Array [
   </button>,
   <br />,
   <button
-    class="ant-btn ant-btn-circle ant-btn-lg ant-btn-icon-only"
+    class="ant-btn ant-btn-circle ant-btn-default ant-btn-lg ant-btn-icon-only"
     type="button"
   >
     <span
@@ -881,7 +881,7 @@ Array [
     </div>
   </div>,
   <button
-    class="ant-btn ant-btn-lg"
+    class="ant-btn ant-btn-default ant-btn-lg"
     type="button"
   >
     <span
@@ -908,7 +908,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-dashed ant-btn-circle ant-btn-lg ant-btn-icon-only"
+    class="ant-btn ant-btn-circle ant-btn-dashed ant-btn-lg ant-btn-icon-only"
     type="button"
   >
     <span
@@ -983,7 +983,7 @@ Array [
     </span>
   </button>,
   <a
-    class="ant-btn ant-btn-lg ant-btn-icon-only"
+    class="ant-btn ant-btn-default ant-btn-lg ant-btn-icon-only"
     href="https://www.google.com"
   >
     <span
@@ -1594,7 +1594,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -1605,7 +1605,7 @@ Array [
     class="ant-btn-group ant-dropdown-button"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1613,7 +1613,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn ant-btn-icon-only ant-dropdown-trigger"
+      class="ant-btn ant-btn-default ant-btn-icon-only ant-dropdown-trigger"
       type="button"
     >
       <span
@@ -1899,7 +1899,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-lg"
+    class="ant-btn ant-btn-default ant-btn-lg"
     type="button"
   >
     <span>
@@ -1949,7 +1949,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-primary ant-btn-circle ant-btn-lg ant-btn-icon-only"
+    class="ant-btn ant-btn-circle ant-btn-primary ant-btn-lg ant-btn-icon-only"
     type="button"
   >
     <span
@@ -1973,7 +1973,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-primary ant-btn-round ant-btn-lg ant-btn-icon-only"
+    class="ant-btn ant-btn-round ant-btn-primary ant-btn-lg ant-btn-icon-only"
     type="button"
   >
     <span
@@ -1997,7 +1997,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-primary ant-btn-round ant-btn-lg"
+    class="ant-btn ant-btn-round ant-btn-primary ant-btn-lg"
     type="button"
   >
     <span
diff --git a/components/button/__tests__/__snapshots__/demo.test.ts.snap b/components/button/__tests__/__snapshots__/demo.test.ts.snap
index 4172fde3dd..dd331c8dc0 100644
--- a/components/button/__tests__/__snapshots__/demo.test.ts.snap
+++ b/components/button/__tests__/__snapshots__/demo.test.ts.snap
@@ -11,7 +11,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -57,7 +57,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-block"
+    class="ant-btn ant-btn-default ant-btn-block"
     type="button"
   >
     <span>
@@ -94,7 +94,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-dangerous"
+    class="ant-btn ant-btn-default ant-btn-dangerous"
     type="button"
   >
     <span>
@@ -149,7 +149,7 @@ Array [
   </button>,
   <br />,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -157,7 +157,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     disabled=""
     type="button"
   >
@@ -221,7 +221,7 @@ Array [
   </button>,
   <br />,
   <button
-    class="ant-btn ant-btn-dangerous"
+    class="ant-btn ant-btn-default ant-btn-dangerous"
     type="button"
   >
     <span>
@@ -229,7 +229,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-dangerous"
+    class="ant-btn ant-btn-default ant-btn-dangerous"
     disabled=""
     type="button"
   >
@@ -277,7 +277,7 @@ Array [
     class="site-button-ghost-wrapper"
   >
     <button
-      class="ant-btn ant-btn-background-ghost"
+      class="ant-btn ant-btn-default ant-btn-background-ghost"
       type="button"
     >
       <span>
@@ -285,7 +285,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn ant-btn-background-ghost"
+      class="ant-btn ant-btn-default ant-btn-background-ghost"
       disabled=""
       type="button"
     >
@@ -310,7 +310,7 @@ exports[`renders ./components/button/demo/ghost.md correctly 1`] = `
     </span>
   </button>
   <button
-    class="ant-btn ant-btn-background-ghost"
+    class="ant-btn ant-btn-default ant-btn-background-ghost"
     type="button"
   >
     <span>
@@ -339,7 +339,7 @@ exports[`renders ./components/button/demo/ghost.md correctly 1`] = `
 exports[`renders ./components/button/demo/icon.md correctly 1`] = `
 Array [
   <button
-    class="ant-btn ant-btn-primary ant-btn-circle ant-btn-icon-only"
+    class="ant-btn ant-btn-circle ant-btn-primary ant-btn-icon-only"
     type="button"
   >
     <span
@@ -363,7 +363,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-primary ant-btn-circle"
+    class="ant-btn ant-btn-circle ant-btn-primary"
     type="button"
   >
     <span>
@@ -398,7 +398,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-circle ant-btn-icon-only"
+    class="ant-btn ant-btn-circle ant-btn-default ant-btn-icon-only"
     type="button"
   >
     <span
@@ -422,7 +422,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span
@@ -450,7 +450,7 @@ Array [
   </button>,
   <br />,
   <button
-    class="ant-btn ant-btn-circle ant-btn-icon-only"
+    class="ant-btn ant-btn-circle ant-btn-default ant-btn-icon-only"
     type="button"
   >
     <span
@@ -474,7 +474,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span
@@ -501,7 +501,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-dashed ant-btn-circle ant-btn-icon-only"
+    class="ant-btn ant-btn-circle ant-btn-dashed ant-btn-icon-only"
     type="button"
   >
     <span
@@ -552,7 +552,7 @@ Array [
     </span>
   </button>,
   <a
-    class="ant-btn ant-btn-icon-only"
+    class="ant-btn ant-btn-default ant-btn-icon-only"
     href="https://www.google.com"
   >
     <span
@@ -578,7 +578,7 @@ Array [
   <br />,
   <br />,
   <button
-    class="ant-btn ant-btn-primary ant-btn-circle ant-btn-lg ant-btn-icon-only"
+    class="ant-btn ant-btn-circle ant-btn-primary ant-btn-lg ant-btn-icon-only"
     type="button"
   >
     <span
@@ -602,7 +602,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-primary ant-btn-circle ant-btn-lg"
+    class="ant-btn ant-btn-circle ant-btn-primary ant-btn-lg"
     type="button"
   >
     <span>
@@ -637,7 +637,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-circle ant-btn-lg ant-btn-icon-only"
+    class="ant-btn ant-btn-circle ant-btn-default ant-btn-lg ant-btn-icon-only"
     type="button"
   >
     <span
@@ -661,7 +661,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-lg"
+    class="ant-btn ant-btn-default ant-btn-lg"
     type="button"
   >
     <span
@@ -689,7 +689,7 @@ Array [
   </button>,
   <br />,
   <button
-    class="ant-btn ant-btn-circle ant-btn-lg ant-btn-icon-only"
+    class="ant-btn ant-btn-circle ant-btn-default ant-btn-lg ant-btn-icon-only"
     type="button"
   >
     <span
@@ -713,7 +713,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-lg"
+    class="ant-btn ant-btn-default ant-btn-lg"
     type="button"
   >
     <span
@@ -740,7 +740,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-dashed ant-btn-circle ant-btn-lg ant-btn-icon-only"
+    class="ant-btn ant-btn-circle ant-btn-dashed ant-btn-lg ant-btn-icon-only"
     type="button"
   >
     <span
@@ -791,7 +791,7 @@ Array [
     </span>
   </button>,
   <a
-    class="ant-btn ant-btn-lg ant-btn-icon-only"
+    class="ant-btn ant-btn-default ant-btn-lg ant-btn-icon-only"
     href="https://www.google.com"
   >
     <span
@@ -1258,7 +1258,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -1269,7 +1269,7 @@ Array [
     class="ant-btn-group ant-dropdown-button"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1277,7 +1277,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn ant-btn-icon-only ant-dropdown-trigger"
+      class="ant-btn ant-btn-default ant-btn-icon-only ant-dropdown-trigger"
       type="button"
     >
       <span
@@ -1379,7 +1379,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-lg"
+    class="ant-btn ant-btn-default ant-btn-lg"
     type="button"
   >
     <span>
@@ -1429,7 +1429,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-primary ant-btn-circle ant-btn-lg ant-btn-icon-only"
+    class="ant-btn ant-btn-circle ant-btn-primary ant-btn-lg ant-btn-icon-only"
     type="button"
   >
     <span
@@ -1453,7 +1453,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-primary ant-btn-round ant-btn-lg ant-btn-icon-only"
+    class="ant-btn ant-btn-round ant-btn-primary ant-btn-lg ant-btn-icon-only"
     type="button"
   >
     <span
@@ -1477,7 +1477,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-btn-primary ant-btn-round ant-btn-lg"
+    class="ant-btn ant-btn-round ant-btn-primary ant-btn-lg"
     type="button"
   >
     <span
diff --git a/components/button/__tests__/__snapshots__/index.test.tsx.snap b/components/button/__tests__/__snapshots__/index.test.tsx.snap
index 651851bda7..64ac5c4bd9 100644
--- a/components/button/__tests__/__snapshots__/index.test.tsx.snap
+++ b/components/button/__tests__/__snapshots__/index.test.tsx.snap
@@ -2,7 +2,7 @@
 
 exports[`Button fixbug renders {0} , 0 and {false} 1`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   0
@@ -11,7 +11,7 @@ exports[`Button fixbug renders {0} , 0 and {false} 1`] = `
 
 exports[`Button fixbug renders {0} , 0 and {false} 2`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span>
@@ -22,14 +22,14 @@ exports[`Button fixbug renders {0} , 0 and {false} 2`] = `
 
 exports[`Button fixbug renders {0} , 0 and {false} 3`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 />
 `;
 
 exports[`Button renders Chinese characters correctly 1`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span>
@@ -40,7 +40,7 @@ exports[`Button renders Chinese characters correctly 1`] = `
 
 exports[`Button renders Chinese characters correctly 2`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span
@@ -70,7 +70,7 @@ exports[`Button renders Chinese characters correctly 2`] = `
 
 exports[`Button renders Chinese characters correctly 3`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span
@@ -100,7 +100,7 @@ exports[`Button renders Chinese characters correctly 3`] = `
 
 exports[`Button renders Chinese characters correctly 4`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span
@@ -130,7 +130,7 @@ exports[`Button renders Chinese characters correctly 4`] = `
 
 exports[`Button renders Chinese characters correctly 5`] = `
 <button
-  class="ant-btn ant-btn-loading"
+  class="ant-btn ant-btn-default ant-btn-loading"
   type="button"
 >
   <span
@@ -164,7 +164,7 @@ exports[`Button renders Chinese characters correctly 5`] = `
 
 exports[`Button renders Chinese characters correctly 6`] = `
 <button
-  class="ant-btn ant-btn-loading"
+  class="ant-btn ant-btn-default ant-btn-loading"
   type="button"
 >
   <span
@@ -199,7 +199,7 @@ exports[`Button renders Chinese characters correctly 6`] = `
 
 exports[`Button renders Chinese characters correctly 7`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span>
@@ -210,7 +210,7 @@ exports[`Button renders Chinese characters correctly 7`] = `
 
 exports[`Button renders correctly 1`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span>
@@ -221,21 +221,21 @@ exports[`Button renders correctly 1`] = `
 
 exports[`Button rtl render component should be rendered correctly in RTL direction 1`] = `
 <button
-  class="ant-btn ant-btn-rtl"
+  class="ant-btn ant-btn-default ant-btn-rtl"
   type="button"
 />
 `;
 
 exports[`Button rtl render component should be rendered correctly in RTL direction 2`] = `
 <button
-  class="ant-btn ant-btn-lg ant-btn-rtl"
+  class="ant-btn ant-btn-default ant-btn-lg ant-btn-rtl"
   type="button"
 />
 `;
 
 exports[`Button rtl render component should be rendered correctly in RTL direction 3`] = `
 <button
-  class="ant-btn ant-btn-sm ant-btn-rtl"
+  class="ant-btn ant-btn-default ant-btn-sm ant-btn-rtl"
   type="button"
 />
 `;
@@ -266,7 +266,7 @@ exports[`Button rtl render component should be rendered correctly in RTL directi
 
 exports[`Button should handle fragment as children 1`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span>
@@ -277,7 +277,7 @@ exports[`Button should handle fragment as children 1`] = `
 
 exports[`Button should merge text if children using variable 1`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span>
@@ -299,14 +299,14 @@ exports[`Button should not render as link button when href is undefined 1`] = `
 
 exports[`Button should render empty button without errors 1`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 />
 `;
 
 exports[`Button should support link button 1`] = `
 <a
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   href="https://ant.design"
   target="_blank"
 >
diff --git a/components/button/button.tsx b/components/button/button.tsx
index 215025ba7b..ee2622326f 100644
--- a/components/button/button.tsx
+++ b/components/button/button.tsx
@@ -136,7 +136,7 @@ const InternalButton: React.ForwardRefRenderFunction<unknown, ButtonProps> = (pr
   const {
     loading = false,
     prefixCls: customizePrefixCls,
-    type,
+    type = 'default',
     danger,
     shape = 'default',
     size: customizeSize,
@@ -237,8 +237,8 @@ const InternalButton: React.ForwardRefRenderFunction<unknown, ButtonProps> = (pr
   const classes = classNames(
     prefixCls,
     {
+      [`${prefixCls}-${shape}`]: shape !== 'default' && shape, // Note: Shape also has `default`
       [`${prefixCls}-${type}`]: type,
-      [`${prefixCls}-${shape}`]: shape !== 'default' && shape,
       [`${prefixCls}-${sizeCls}`]: sizeCls,
       [`${prefixCls}-icon-only`]: !children && children !== 0 && !!iconType,
       [`${prefixCls}-background-ghost`]: ghost && !isUnborderedButtonType(type),
diff --git a/components/card/__tests__/__snapshots__/index.test.js.snap b/components/card/__tests__/__snapshots__/index.test.js.snap
index 3fc36d6673..7819e2e6a0 100644
--- a/components/card/__tests__/__snapshots__/index.test.js.snap
+++ b/components/card/__tests__/__snapshots__/index.test.js.snap
@@ -152,7 +152,7 @@ exports[`Card title should be vertically aligned 1`] = `
         class="ant-card-extra"
       >
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
diff --git a/components/config-provider/__tests__/__snapshots__/components.test.js.snap b/components/config-provider/__tests__/__snapshots__/components.test.js.snap
index 7817ae165f..8fb2f1be13 100644
--- a/components/config-provider/__tests__/__snapshots__/components.test.js.snap
+++ b/components/config-provider/__tests__/__snapshots__/components.test.js.snap
@@ -1173,7 +1173,7 @@ exports[`ConfigProvider components Breadcrumb prefixCls 1`] = `
 exports[`ConfigProvider components Button configProvider 1`] = `
 <div>
   <button
-    class="config-btn"
+    class="config-btn config-btn-default"
     type="button"
   >
     <span>
@@ -1184,7 +1184,7 @@ exports[`ConfigProvider components Button configProvider 1`] = `
     class="config-btn-group"
   >
     <button
-      class="config-btn"
+      class="config-btn config-btn-default"
       type="button"
     >
       <span>
@@ -1192,7 +1192,7 @@ exports[`ConfigProvider components Button configProvider 1`] = `
       </span>
     </button>
     <button
-      class="config-btn"
+      class="config-btn config-btn-default"
       type="button"
     >
       <span>
@@ -1206,7 +1206,7 @@ exports[`ConfigProvider components Button configProvider 1`] = `
 exports[`ConfigProvider components Button configProvider componentSize large 1`] = `
 <div>
   <button
-    class="config-btn config-btn-lg"
+    class="config-btn config-btn-default config-btn-lg"
     type="button"
   >
     <span>
@@ -1217,7 +1217,7 @@ exports[`ConfigProvider components Button configProvider componentSize large 1`]
     class="config-btn-group"
   >
     <button
-      class="config-btn config-btn-lg"
+      class="config-btn config-btn-default config-btn-lg"
       type="button"
     >
       <span>
@@ -1225,7 +1225,7 @@ exports[`ConfigProvider components Button configProvider componentSize large 1`]
       </span>
     </button>
     <button
-      class="config-btn config-btn-lg"
+      class="config-btn config-btn-default config-btn-lg"
       type="button"
     >
       <span>
@@ -1239,7 +1239,7 @@ exports[`ConfigProvider components Button configProvider componentSize large 1`]
 exports[`ConfigProvider components Button configProvider componentSize middle 1`] = `
 <div>
   <button
-    class="config-btn"
+    class="config-btn config-btn-default"
     type="button"
   >
     <span>
@@ -1250,7 +1250,7 @@ exports[`ConfigProvider components Button configProvider componentSize middle 1`
     class="config-btn-group"
   >
     <button
-      class="config-btn"
+      class="config-btn config-btn-default"
       type="button"
     >
       <span>
@@ -1258,7 +1258,7 @@ exports[`ConfigProvider components Button configProvider componentSize middle 1`
       </span>
     </button>
     <button
-      class="config-btn"
+      class="config-btn config-btn-default"
       type="button"
     >
       <span>
@@ -1272,7 +1272,7 @@ exports[`ConfigProvider components Button configProvider componentSize middle 1`
 exports[`ConfigProvider components Button configProvider virtual and dropdownMatchSelectWidth 1`] = `
 <div>
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -1283,7 +1283,7 @@ exports[`ConfigProvider components Button configProvider virtual and dropdownMat
     class="ant-btn-group"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1291,7 +1291,7 @@ exports[`ConfigProvider components Button configProvider virtual and dropdownMat
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1305,7 +1305,7 @@ exports[`ConfigProvider components Button configProvider virtual and dropdownMat
 exports[`ConfigProvider components Button normal 1`] = `
 <div>
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -1316,7 +1316,7 @@ exports[`ConfigProvider components Button normal 1`] = `
     class="ant-btn-group"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1324,7 +1324,7 @@ exports[`ConfigProvider components Button normal 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1338,7 +1338,7 @@ exports[`ConfigProvider components Button normal 1`] = `
 exports[`ConfigProvider components Button prefixCls 1`] = `
 <div>
   <button
-    class="prefix-Button"
+    class="prefix-Button prefix-Button-default"
     type="button"
   >
     <span>
@@ -1349,7 +1349,7 @@ exports[`ConfigProvider components Button prefixCls 1`] = `
     class="prefix-Button"
   >
     <button
-      class="prefix-Button"
+      class="prefix-Button prefix-Button-default"
       type="button"
     >
       <span>
@@ -1357,7 +1357,7 @@ exports[`ConfigProvider components Button prefixCls 1`] = `
       </span>
     </button>
     <button
-      class="prefix-Button"
+      class="prefix-Button prefix-Button-default"
       type="button"
     >
       <span>
@@ -12671,7 +12671,7 @@ exports[`ConfigProvider components Dropdown configProvider 1`] = `
   class="config-btn-group config-dropdown-button"
 >
   <button
-    class="config-btn"
+    class="config-btn config-btn-default"
     type="button"
   >
     <span>
@@ -12679,7 +12679,7 @@ exports[`ConfigProvider components Dropdown configProvider 1`] = `
     </span>
   </button>
   <button
-    class="config-btn config-btn-icon-only config-dropdown-trigger"
+    class="config-btn config-btn-default config-btn-icon-only config-dropdown-trigger"
     type="button"
   >
     <span
@@ -12710,7 +12710,7 @@ exports[`ConfigProvider components Dropdown configProvider componentSize large 1
   class="config-btn-group config-dropdown-button"
 >
   <button
-    class="config-btn config-btn-lg"
+    class="config-btn config-btn-default config-btn-lg"
     type="button"
   >
     <span>
@@ -12718,7 +12718,7 @@ exports[`ConfigProvider components Dropdown configProvider componentSize large 1
     </span>
   </button>
   <button
-    class="config-btn config-btn-lg config-btn-icon-only config-dropdown-trigger"
+    class="config-btn config-btn-default config-btn-lg config-btn-icon-only config-dropdown-trigger"
     type="button"
   >
     <span
@@ -12749,7 +12749,7 @@ exports[`ConfigProvider components Dropdown configProvider componentSize middle
   class="config-btn-group config-dropdown-button"
 >
   <button
-    class="config-btn"
+    class="config-btn config-btn-default"
     type="button"
   >
     <span>
@@ -12757,7 +12757,7 @@ exports[`ConfigProvider components Dropdown configProvider componentSize middle
     </span>
   </button>
   <button
-    class="config-btn config-btn-icon-only config-dropdown-trigger"
+    class="config-btn config-btn-default config-btn-icon-only config-dropdown-trigger"
     type="button"
   >
     <span
@@ -12788,7 +12788,7 @@ exports[`ConfigProvider components Dropdown configProvider virtual and dropdownM
   class="ant-btn-group ant-dropdown-button"
 >
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -12796,7 +12796,7 @@ exports[`ConfigProvider components Dropdown configProvider virtual and dropdownM
     </span>
   </button>
   <button
-    class="ant-btn ant-btn-icon-only ant-dropdown-trigger"
+    class="ant-btn ant-btn-default ant-btn-icon-only ant-dropdown-trigger"
     type="button"
   >
     <span
@@ -12827,7 +12827,7 @@ exports[`ConfigProvider components Dropdown normal 1`] = `
   class="ant-btn-group ant-dropdown-button"
 >
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -12835,7 +12835,7 @@ exports[`ConfigProvider components Dropdown normal 1`] = `
     </span>
   </button>
   <button
-    class="ant-btn ant-btn-icon-only ant-dropdown-trigger"
+    class="ant-btn ant-btn-default ant-btn-icon-only ant-dropdown-trigger"
     type="button"
   >
     <span
@@ -12866,7 +12866,7 @@ exports[`ConfigProvider components Dropdown prefixCls 1`] = `
   class="ant-btn-group prefix-Dropdown"
 >
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -12874,7 +12874,7 @@ exports[`ConfigProvider components Dropdown prefixCls 1`] = `
     </span>
   </button>
   <button
-    class="ant-btn ant-btn-icon-only ant-dropdown-trigger"
+    class="ant-btn ant-btn-default ant-btn-icon-only ant-dropdown-trigger"
     type="button"
   >
     <span
@@ -13663,7 +13663,7 @@ exports[`ConfigProvider components Input configProvider 1`] = `
           class="config-input-group-addon"
         >
           <button
-            class="config-btn config-btn-icon-only config-input-search-button"
+            class="config-btn config-btn-default config-btn-icon-only config-input-search-button"
             type="button"
           >
             <span
@@ -13758,7 +13758,7 @@ exports[`ConfigProvider components Input configProvider componentSize large 1`]
           class="config-input-group-addon"
         >
           <button
-            class="config-btn config-btn-lg config-btn-icon-only config-input-search-button"
+            class="config-btn config-btn-default config-btn-lg config-btn-icon-only config-input-search-button"
             type="button"
           >
             <span
@@ -13853,7 +13853,7 @@ exports[`ConfigProvider components Input configProvider componentSize middle 1`]
           class="config-input-group-addon"
         >
           <button
-            class="config-btn config-btn-icon-only config-input-search-button"
+            class="config-btn config-btn-default config-btn-icon-only config-input-search-button"
             type="button"
           >
             <span
@@ -13948,7 +13948,7 @@ exports[`ConfigProvider components Input configProvider virtual and dropdownMatc
           class="ant-input-group-addon"
         >
           <button
-            class="ant-btn ant-btn-icon-only ant-input-search-button"
+            class="ant-btn ant-btn-default ant-btn-icon-only ant-input-search-button"
             type="button"
           >
             <span
@@ -14043,7 +14043,7 @@ exports[`ConfigProvider components Input normal 1`] = `
           class="ant-input-group-addon"
         >
           <button
-            class="ant-btn ant-btn-icon-only ant-input-search-button"
+            class="ant-btn ant-btn-default ant-btn-icon-only ant-input-search-button"
             type="button"
           >
             <span
@@ -14138,7 +14138,7 @@ exports[`ConfigProvider components Input prefixCls 1`] = `
           class="ant-input-group-addon"
         >
           <button
-            class="ant-btn ant-btn-icon-only prefix-Input-button"
+            class="ant-btn ant-btn-default ant-btn-icon-only prefix-Input-button"
             type="button"
           >
             <span
@@ -15624,7 +15624,7 @@ exports[`ConfigProvider components Modal configProvider 1`] = `
             class="config-modal-footer"
           >
             <button
-              class="config-btn"
+              class="config-btn config-btn-default"
               type="button"
             >
               <span>
@@ -15716,7 +15716,7 @@ exports[`ConfigProvider components Modal configProvider componentSize large 1`]
             class="config-modal-footer"
           >
             <button
-              class="config-btn config-btn-lg"
+              class="config-btn config-btn-default config-btn-lg"
               type="button"
             >
               <span>
@@ -15808,7 +15808,7 @@ exports[`ConfigProvider components Modal configProvider componentSize middle 1`]
             class="config-modal-footer"
           >
             <button
-              class="config-btn"
+              class="config-btn config-btn-default"
               type="button"
             >
               <span>
@@ -15900,7 +15900,7 @@ exports[`ConfigProvider components Modal configProvider virtual and dropdownMatc
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -15992,7 +15992,7 @@ exports[`ConfigProvider components Modal normal 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -16084,7 +16084,7 @@ exports[`ConfigProvider components Modal prefixCls 1`] = `
             class="prefix-Modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -18091,7 +18091,7 @@ exports[`ConfigProvider components Popconfirm configProvider 1`] = `
               class="config-popover-buttons"
             >
               <button
-                class="config-btn config-btn-sm"
+                class="config-btn config-btn-default config-btn-sm"
                 type="button"
               >
                 <span>
@@ -18174,7 +18174,7 @@ exports[`ConfigProvider components Popconfirm configProvider componentSize large
               class="config-popover-buttons"
             >
               <button
-                class="config-btn config-btn-sm"
+                class="config-btn config-btn-default config-btn-sm"
                 type="button"
               >
                 <span>
@@ -18257,7 +18257,7 @@ exports[`ConfigProvider components Popconfirm configProvider componentSize middl
               class="config-popover-buttons"
             >
               <button
-                class="config-btn config-btn-sm"
+                class="config-btn config-btn-default config-btn-sm"
                 type="button"
               >
                 <span>
@@ -18340,7 +18340,7 @@ exports[`ConfigProvider components Popconfirm configProvider virtual and dropdow
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -18423,7 +18423,7 @@ exports[`ConfigProvider components Popconfirm normal 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -18506,7 +18506,7 @@ exports[`ConfigProvider components Popconfirm prefixCls 1`] = `
               class="prefix-Popconfirm-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
diff --git a/components/config-provider/__tests__/index.test.js b/components/config-provider/__tests__/index.test.js
index 4b11c42a30..a6dc8a78f4 100644
--- a/components/config-provider/__tests__/index.test.js
+++ b/components/config-provider/__tests__/index.test.js
@@ -54,7 +54,7 @@ describe('ConfigProvider', () => {
       </ConfigProvider>,
     );
 
-    expect(wrapper.find('button').props().className).toEqual('bamboo-btn');
+    expect(wrapper.exists('button.bamboo-btn')).toBeTruthy();
   });
 
   it('dynamic prefixCls', () => {
@@ -76,9 +76,9 @@ describe('ConfigProvider', () => {
 
     const wrapper = mount(<DynamicPrefixCls />);
 
-    expect(wrapper.find('button').last().props().className).toEqual('bamboo-btn');
+    expect(wrapper.exists('button.bamboo-btn')).toBeTruthy();
     wrapper.find('.toggle-button').first().simulate('click');
-    expect(wrapper.find('button').last().props().className).toEqual('light-btn');
+    expect(wrapper.exists('button.light-btn')).toBeTruthy();
   });
 
   it('iconPrefixCls', () => {
diff --git a/components/drawer/__tests__/__snapshots__/DrawerEvent.test.js.snap b/components/drawer/__tests__/__snapshots__/DrawerEvent.test.js.snap
index 4658b9c993..f699b461b9 100644
--- a/components/drawer/__tests__/__snapshots__/DrawerEvent.test.js.snap
+++ b/components/drawer/__tests__/__snapshots__/DrawerEvent.test.js.snap
@@ -3,7 +3,7 @@
 exports[`Drawer render correctly 1`] = `
 <div>
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
diff --git a/components/dropdown/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/dropdown/__tests__/__snapshots__/demo-extend.test.ts.snap
index 7ba1062ede..ff41a07fd6 100644
--- a/components/dropdown/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/dropdown/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -3,7 +3,7 @@
 exports[`renders ./components/dropdown/demo/arrow.md extend context correctly 1`] = `
 Array [
   <button
-    class="ant-btn ant-dropdown-trigger"
+    class="ant-btn ant-btn-default ant-dropdown-trigger"
     type="button"
   >
     <span>
@@ -216,7 +216,7 @@ Array [
     </div>
   </div>,
   <button
-    class="ant-btn ant-dropdown-trigger"
+    class="ant-btn ant-btn-default ant-dropdown-trigger"
     type="button"
   >
     <span>
@@ -429,7 +429,7 @@ Array [
     </div>
   </div>,
   <button
-    class="ant-btn ant-dropdown-trigger"
+    class="ant-btn ant-btn-default ant-dropdown-trigger"
     type="button"
   >
     <span>
@@ -643,7 +643,7 @@ Array [
   </div>,
   <br />,
   <button
-    class="ant-btn ant-dropdown-trigger"
+    class="ant-btn ant-btn-default ant-dropdown-trigger"
     type="button"
   >
     <span>
@@ -856,7 +856,7 @@ Array [
     </div>
   </div>,
   <button
-    class="ant-btn ant-dropdown-trigger"
+    class="ant-btn ant-btn-default ant-dropdown-trigger"
     type="button"
   >
     <span>
@@ -1069,7 +1069,7 @@ Array [
     </div>
   </div>,
   <button
-    class="ant-btn ant-dropdown-trigger"
+    class="ant-btn ant-btn-default ant-dropdown-trigger"
     type="button"
   >
     <span>
@@ -1797,7 +1797,7 @@ exports[`renders ./components/dropdown/demo/dropdown-button.md extend context co
       class="ant-btn-group ant-dropdown-button"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
@@ -1805,7 +1805,7 @@ exports[`renders ./components/dropdown/demo/dropdown-button.md extend context co
         </span>
       </button>
       <button
-        class="ant-btn ant-btn-icon-only ant-dropdown-trigger"
+        class="ant-btn ant-btn-default ant-btn-icon-only ant-dropdown-trigger"
         type="button"
       >
         <span
@@ -2079,7 +2079,7 @@ exports[`renders ./components/dropdown/demo/dropdown-button.md extend context co
       class="ant-btn-group ant-dropdown-button"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
@@ -2087,7 +2087,7 @@ exports[`renders ./components/dropdown/demo/dropdown-button.md extend context co
         </span>
       </button>
       <button
-        class="ant-btn ant-btn-icon-only ant-dropdown-trigger"
+        class="ant-btn ant-btn-default ant-btn-icon-only ant-dropdown-trigger"
         type="button"
       >
         <span
@@ -2361,7 +2361,7 @@ exports[`renders ./components/dropdown/demo/dropdown-button.md extend context co
       class="ant-btn-group ant-dropdown-button"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         disabled=""
         type="button"
       >
@@ -2370,7 +2370,7 @@ exports[`renders ./components/dropdown/demo/dropdown-button.md extend context co
         </span>
       </button>
       <button
-        class="ant-btn ant-btn-icon-only ant-dropdown-trigger"
+        class="ant-btn ant-btn-default ant-btn-icon-only ant-dropdown-trigger"
         disabled=""
         type="button"
       >
@@ -2645,7 +2645,7 @@ exports[`renders ./components/dropdown/demo/dropdown-button.md extend context co
       class="ant-btn-group ant-dropdown-button"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
@@ -2677,7 +2677,7 @@ exports[`renders ./components/dropdown/demo/dropdown-button.md extend context co
         </div>
       </div>
       <button
-        class="ant-btn ant-btn-icon-only ant-btn-loading ant-dropdown-trigger"
+        class="ant-btn ant-btn-default ant-btn-icon-only ant-btn-loading ant-dropdown-trigger"
         type="button"
       >
         <span
@@ -2952,7 +2952,7 @@ exports[`renders ./components/dropdown/demo/dropdown-button.md extend context co
     style="padding-bottom:8px"
   >
     <button
-      class="ant-btn ant-dropdown-trigger"
+      class="ant-btn ant-btn-default ant-dropdown-trigger"
       type="button"
     >
       <span>
@@ -4066,7 +4066,7 @@ exports[`renders ./components/dropdown/demo/loading.md extend context correctly
       class="ant-btn-group ant-dropdown-button"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
@@ -4074,7 +4074,7 @@ exports[`renders ./components/dropdown/demo/loading.md extend context correctly
         </span>
       </button>
       <button
-        class="ant-btn ant-btn-icon-only ant-dropdown-trigger"
+        class="ant-btn ant-btn-default ant-btn-icon-only ant-dropdown-trigger"
         type="button"
       >
         <span
@@ -5535,7 +5535,7 @@ exports[`renders ./components/dropdown/demo/placement.md extend context correctl
         style="margin-right:8px;padding-bottom:8px"
       >
         <button
-          class="ant-btn ant-dropdown-trigger"
+          class="ant-btn ant-btn-default ant-dropdown-trigger"
           type="button"
         >
           <span>
@@ -5750,7 +5750,7 @@ exports[`renders ./components/dropdown/demo/placement.md extend context correctl
         style="margin-right:8px;padding-bottom:8px"
       >
         <button
-          class="ant-btn ant-dropdown-trigger"
+          class="ant-btn ant-btn-default ant-dropdown-trigger"
           type="button"
         >
           <span>
@@ -5965,7 +5965,7 @@ exports[`renders ./components/dropdown/demo/placement.md extend context correctl
         style="padding-bottom:8px"
       >
         <button
-          class="ant-btn ant-dropdown-trigger"
+          class="ant-btn ant-btn-default ant-dropdown-trigger"
           type="button"
         >
           <span>
@@ -6189,7 +6189,7 @@ exports[`renders ./components/dropdown/demo/placement.md extend context correctl
         style="margin-right:8px;padding-bottom:8px"
       >
         <button
-          class="ant-btn ant-dropdown-trigger"
+          class="ant-btn ant-btn-default ant-dropdown-trigger"
           type="button"
         >
           <span>
@@ -6404,7 +6404,7 @@ exports[`renders ./components/dropdown/demo/placement.md extend context correctl
         style="margin-right:8px;padding-bottom:8px"
       >
         <button
-          class="ant-btn ant-dropdown-trigger"
+          class="ant-btn ant-btn-default ant-dropdown-trigger"
           type="button"
         >
           <span>
@@ -6619,7 +6619,7 @@ exports[`renders ./components/dropdown/demo/placement.md extend context correctl
         style="padding-bottom:8px"
       >
         <button
-          class="ant-btn ant-dropdown-trigger"
+          class="ant-btn ant-btn-default ant-dropdown-trigger"
           type="button"
         >
           <span>
diff --git a/components/dropdown/__tests__/__snapshots__/demo.test.js.snap b/components/dropdown/__tests__/__snapshots__/demo.test.js.snap
index 4e4aa98da4..ac10832018 100644
--- a/components/dropdown/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/dropdown/__tests__/__snapshots__/demo.test.js.snap
@@ -3,7 +3,7 @@
 exports[`renders ./components/dropdown/demo/arrow.md correctly 1`] = `
 Array [
   <button
-    class="ant-btn ant-dropdown-trigger"
+    class="ant-btn ant-btn-default ant-dropdown-trigger"
     type="button"
   >
     <span>
@@ -11,7 +11,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-dropdown-trigger"
+    class="ant-btn ant-btn-default ant-dropdown-trigger"
     type="button"
   >
     <span>
@@ -19,7 +19,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-dropdown-trigger"
+    class="ant-btn ant-btn-default ant-dropdown-trigger"
     type="button"
   >
     <span>
@@ -28,7 +28,7 @@ Array [
   </button>,
   <br />,
   <button
-    class="ant-btn ant-dropdown-trigger"
+    class="ant-btn ant-btn-default ant-dropdown-trigger"
     type="button"
   >
     <span>
@@ -36,7 +36,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-dropdown-trigger"
+    class="ant-btn ant-btn-default ant-dropdown-trigger"
     type="button"
   >
     <span>
@@ -44,7 +44,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn ant-dropdown-trigger"
+    class="ant-btn ant-btn-default ant-dropdown-trigger"
     type="button"
   >
     <span>
@@ -103,7 +103,7 @@ exports[`renders ./components/dropdown/demo/dropdown-button.md correctly 1`] = `
       class="ant-btn-group ant-dropdown-button"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
@@ -111,7 +111,7 @@ exports[`renders ./components/dropdown/demo/dropdown-button.md correctly 1`] = `
         </span>
       </button>
       <button
-        class="ant-btn ant-btn-icon-only ant-dropdown-trigger"
+        class="ant-btn ant-btn-default ant-btn-icon-only ant-dropdown-trigger"
         type="button"
       >
         <span
@@ -144,7 +144,7 @@ exports[`renders ./components/dropdown/demo/dropdown-button.md correctly 1`] = `
       class="ant-btn-group ant-dropdown-button"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
@@ -152,7 +152,7 @@ exports[`renders ./components/dropdown/demo/dropdown-button.md correctly 1`] = `
         </span>
       </button>
       <button
-        class="ant-btn ant-btn-icon-only ant-dropdown-trigger"
+        class="ant-btn ant-btn-default ant-btn-icon-only ant-dropdown-trigger"
         type="button"
       >
         <span
@@ -185,7 +185,7 @@ exports[`renders ./components/dropdown/demo/dropdown-button.md correctly 1`] = `
       class="ant-btn-group ant-dropdown-button"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         disabled=""
         type="button"
       >
@@ -194,7 +194,7 @@ exports[`renders ./components/dropdown/demo/dropdown-button.md correctly 1`] = `
         </span>
       </button>
       <button
-        class="ant-btn ant-btn-icon-only ant-dropdown-trigger"
+        class="ant-btn ant-btn-default ant-btn-icon-only ant-dropdown-trigger"
         disabled=""
         type="button"
       >
@@ -228,7 +228,7 @@ exports[`renders ./components/dropdown/demo/dropdown-button.md correctly 1`] = `
       class="ant-btn-group ant-dropdown-button"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
@@ -236,7 +236,7 @@ exports[`renders ./components/dropdown/demo/dropdown-button.md correctly 1`] = `
         </span>
       </button>
       <button
-        class="ant-btn ant-btn-icon-only ant-btn-loading ant-dropdown-trigger"
+        class="ant-btn ant-btn-default ant-btn-icon-only ant-btn-loading ant-dropdown-trigger"
         type="button"
       >
         <span
@@ -270,7 +270,7 @@ exports[`renders ./components/dropdown/demo/dropdown-button.md correctly 1`] = `
     style="padding-bottom:8px"
   >
     <button
-      class="ant-btn ant-dropdown-trigger"
+      class="ant-btn ant-btn-default ant-dropdown-trigger"
       type="button"
     >
       <span>
@@ -534,7 +534,7 @@ exports[`renders ./components/dropdown/demo/loading.md correctly 1`] = `
       class="ant-btn-group ant-dropdown-button"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
@@ -542,7 +542,7 @@ exports[`renders ./components/dropdown/demo/loading.md correctly 1`] = `
         </span>
       </button>
       <button
-        class="ant-btn ant-btn-icon-only ant-dropdown-trigger"
+        class="ant-btn ant-btn-default ant-btn-icon-only ant-dropdown-trigger"
         type="button"
       >
         <span
@@ -641,7 +641,7 @@ exports[`renders ./components/dropdown/demo/placement.md correctly 1`] = `
         style="margin-right:8px;padding-bottom:8px"
       >
         <button
-          class="ant-btn ant-dropdown-trigger"
+          class="ant-btn ant-btn-default ant-dropdown-trigger"
           type="button"
         >
           <span>
@@ -654,7 +654,7 @@ exports[`renders ./components/dropdown/demo/placement.md correctly 1`] = `
         style="margin-right:8px;padding-bottom:8px"
       >
         <button
-          class="ant-btn ant-dropdown-trigger"
+          class="ant-btn ant-btn-default ant-dropdown-trigger"
           type="button"
         >
           <span>
@@ -667,7 +667,7 @@ exports[`renders ./components/dropdown/demo/placement.md correctly 1`] = `
         style="padding-bottom:8px"
       >
         <button
-          class="ant-btn ant-dropdown-trigger"
+          class="ant-btn ant-btn-default ant-dropdown-trigger"
           type="button"
         >
           <span>
@@ -689,7 +689,7 @@ exports[`renders ./components/dropdown/demo/placement.md correctly 1`] = `
         style="margin-right:8px;padding-bottom:8px"
       >
         <button
-          class="ant-btn ant-dropdown-trigger"
+          class="ant-btn ant-btn-default ant-dropdown-trigger"
           type="button"
         >
           <span>
@@ -702,7 +702,7 @@ exports[`renders ./components/dropdown/demo/placement.md correctly 1`] = `
         style="margin-right:8px;padding-bottom:8px"
       >
         <button
-          class="ant-btn ant-dropdown-trigger"
+          class="ant-btn ant-btn-default ant-dropdown-trigger"
           type="button"
         >
           <span>
@@ -715,7 +715,7 @@ exports[`renders ./components/dropdown/demo/placement.md correctly 1`] = `
         style="padding-bottom:8px"
       >
         <button
-          class="ant-btn ant-dropdown-trigger"
+          class="ant-btn ant-btn-default ant-dropdown-trigger"
           type="button"
         >
           <span>
diff --git a/components/dropdown/__tests__/__snapshots__/dropdown-button.test.js.snap b/components/dropdown/__tests__/__snapshots__/dropdown-button.test.js.snap
index 36c779c63a..5d60222278 100644
--- a/components/dropdown/__tests__/__snapshots__/dropdown-button.test.js.snap
+++ b/components/dropdown/__tests__/__snapshots__/dropdown-button.test.js.snap
@@ -5,11 +5,11 @@ exports[`DropdownButton rtl render component should be rendered correctly in RTL
   class="ant-btn-group ant-btn-group-rtl ant-dropdown-button"
 >
   <button
-    class="ant-btn ant-btn-rtl"
+    class="ant-btn ant-btn-default ant-btn-rtl"
     type="button"
   />
   <button
-    class="ant-btn ant-btn-icon-only ant-btn-rtl ant-dropdown-trigger ant-dropdown-rtl"
+    class="ant-btn ant-btn-default ant-btn-icon-only ant-btn-rtl ant-dropdown-trigger ant-dropdown-rtl"
     type="button"
   >
     <span
@@ -40,11 +40,11 @@ exports[`DropdownButton should support href like Button 1`] = `
   class="ant-btn-group ant-dropdown-button"
 >
   <a
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     href="https://ant.design"
   />
   <button
-    class="ant-btn ant-btn-icon-only ant-dropdown-trigger"
+    class="ant-btn ant-btn-default ant-btn-icon-only ant-dropdown-trigger"
     type="button"
   >
     <span
diff --git a/components/form/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/form/__tests__/__snapshots__/demo-extend.test.ts.snap
index d1bfde83d6..377859a68c 100644
--- a/components/form/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/form/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -261,7 +261,7 @@ exports[`renders ./components/form/demo/advanced-search.md extend context correc
           </span>
         </button>
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           style="margin:0 8px"
           type="button"
         >
@@ -846,7 +846,7 @@ exports[`renders ./components/form/demo/control-hooks.md extend context correctl
             </span>
           </button>
           <button
-            class="ant-btn"
+            class="ant-btn ant-btn-default"
             type="button"
           >
             <span>
@@ -1112,7 +1112,7 @@ exports[`renders ./components/form/demo/control-ref.md extend context correctly
             </span>
           </button>
           <button
-            class="ant-btn"
+            class="ant-btn ant-btn-default"
             type="button"
           >
             <span>
@@ -2747,7 +2747,7 @@ exports[`renders ./components/form/demo/form-context.md extend context correctly
             </span>
           </button>
           <button
-            class="ant-btn"
+            class="ant-btn ant-btn-default"
             style="margin:0 8px"
             type="button"
           >
@@ -3920,7 +3920,7 @@ exports[`renders ./components/form/demo/ref-item.md extend context correctly 1`]
     </span>
   </button>
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -5157,7 +5157,7 @@ exports[`renders ./components/form/demo/register.md extend context correctly 1`]
               style="padding-left:4px;padding-right:4px"
             >
               <button
-                class="ant-btn"
+                class="ant-btn ant-btn-default"
                 type="button"
               >
                 <span>
@@ -6890,7 +6890,7 @@ exports[`renders ./components/form/demo/size.md extend context correctly 1`] = `
           class="ant-form-item-control-input-content"
         >
           <button
-            class="ant-btn"
+            class="ant-btn ant-btn-default"
             type="button"
           >
             <span>
@@ -15825,7 +15825,7 @@ exports[`renders ./components/form/demo/validate-other.md extend context correct
                   type="file"
                 />
                 <button
-                  class="ant-btn"
+                  class="ant-btn ant-btn-default"
                   type="button"
                 >
                   <span
@@ -20547,7 +20547,7 @@ exports[`renders ./components/form/demo/warning-only.md extend context correctly
               class="ant-space-item"
             >
               <button
-                class="ant-btn"
+                class="ant-btn ant-btn-default"
                 type="button"
               >
                 <span>
diff --git a/components/form/__tests__/__snapshots__/demo.test.js.snap b/components/form/__tests__/__snapshots__/demo.test.js.snap
index 8201258bc2..8dbd143577 100644
--- a/components/form/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/form/__tests__/__snapshots__/demo.test.js.snap
@@ -261,7 +261,7 @@ exports[`renders ./components/form/demo/advanced-search.md correctly 1`] = `
           </span>
         </button>
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           style="margin:0 8px"
           type="button"
         >
@@ -747,7 +747,7 @@ exports[`renders ./components/form/demo/control-hooks.md correctly 1`] = `
             </span>
           </button>
           <button
-            class="ant-btn"
+            class="ant-btn ant-btn-default"
             type="button"
           >
             <span>
@@ -914,7 +914,7 @@ exports[`renders ./components/form/demo/control-ref.md correctly 1`] = `
             </span>
           </button>
           <button
-            class="ant-btn"
+            class="ant-btn ant-btn-default"
             type="button"
           >
             <span>
@@ -2385,7 +2385,7 @@ exports[`renders ./components/form/demo/form-context.md correctly 1`] = `
             </span>
           </button>
           <button
-            class="ant-btn"
+            class="ant-btn ant-btn-default"
             style="margin:0 8px"
             type="button"
           >
@@ -3558,7 +3558,7 @@ exports[`renders ./components/form/demo/ref-item.md correctly 1`] = `
     </span>
   </button>
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -4404,7 +4404,7 @@ exports[`renders ./components/form/demo/register.md correctly 1`] = `
               style="padding-left:4px;padding-right:4px"
             >
               <button
-                class="ant-btn"
+                class="ant-btn ant-btn-default"
                 type="button"
               >
                 <span>
@@ -5327,7 +5327,7 @@ exports[`renders ./components/form/demo/size.md correctly 1`] = `
           class="ant-form-item-control-input-content"
         >
           <button
-            class="ant-btn"
+            class="ant-btn ant-btn-default"
             type="button"
           >
             <span>
@@ -7050,7 +7050,7 @@ exports[`renders ./components/form/demo/validate-other.md correctly 1`] = `
                   type="file"
                 />
                 <button
-                  class="ant-btn"
+                  class="ant-btn ant-btn-default"
                   type="button"
                 >
                   <span
@@ -8615,7 +8615,7 @@ exports[`renders ./components/form/demo/warning-only.md correctly 1`] = `
               class="ant-space-item"
             >
               <button
-                class="ant-btn"
+                class="ant-btn ant-btn-default"
                 type="button"
               >
                 <span>
diff --git a/components/input/__tests__/__snapshots__/Search.test.js.snap b/components/input/__tests__/__snapshots__/Search.test.js.snap
index d224e0be32..29de245a3a 100644
--- a/components/input/__tests__/__snapshots__/Search.test.js.snap
+++ b/components/input/__tests__/__snapshots__/Search.test.js.snap
@@ -16,7 +16,7 @@ exports[`Input.Search rtl render component should be rendered correctly in RTL d
       class="ant-input-group-addon"
     >
       <button
-        class="ant-btn ant-btn-icon-only ant-btn-rtl ant-input-search-button"
+        class="ant-btn ant-btn-default ant-btn-icon-only ant-btn-rtl ant-input-search-button"
         type="button"
       >
         <span
@@ -71,7 +71,7 @@ exports[`Input.Search should support ReactNode suffix without error 1`] = `
       class="ant-input-group-addon"
     >
       <button
-        class="ant-btn ant-btn-icon-only ant-input-search-button"
+        class="ant-btn ant-btn-default ant-btn-icon-only ant-input-search-button"
         type="button"
       >
         <span
@@ -115,7 +115,7 @@ exports[`Input.Search should support addonAfter 1`] = `
       class="ant-input-group-addon"
     >
       <button
-        class="ant-btn ant-btn-icon-only ant-input-search-button"
+        class="ant-btn ant-btn-default ant-btn-icon-only ant-input-search-button"
         type="button"
       >
         <span
@@ -218,7 +218,7 @@ exports[`Input.Search should support addonAfter and suffix for loading 1`] = `
       class="ant-input-group-addon"
     >
       <button
-        class="ant-btn ant-btn-icon-only ant-btn-loading ant-input-search-button"
+        class="ant-btn ant-btn-default ant-btn-icon-only ant-btn-loading ant-input-search-button"
         type="button"
       >
         <span
@@ -325,7 +325,7 @@ exports[`Input.Search should support custom Button 1`] = `
       class="ant-input-group-addon"
     >
       <button
-        class="ant-btn ant-input-search-button"
+        class="ant-btn ant-btn-default ant-input-search-button"
         type="button"
       >
         <span>
@@ -429,7 +429,7 @@ exports[`Input.Search should support invalid suffix 1`] = `
       class="ant-input-group-addon"
     >
       <button
-        class="ant-btn ant-btn-icon-only ant-input-search-button"
+        class="ant-btn ant-btn-default ant-btn-icon-only ant-input-search-button"
         type="button"
       >
         <span
@@ -473,7 +473,7 @@ exports[`Input.Search should support loading 1`] = `
       class="ant-input-group-addon"
     >
       <button
-        class="ant-btn ant-btn-icon-only ant-btn-loading ant-input-search-button"
+        class="ant-btn ant-btn-default ant-btn-icon-only ant-btn-loading ant-input-search-button"
         type="button"
       >
         <span
diff --git a/components/input/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/input/__tests__/__snapshots__/demo-extend.test.ts.snap
index f7d7cc1217..7d5a57b656 100644
--- a/components/input/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/input/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -5094,7 +5094,7 @@ exports[`renders ./components/input/demo/focus.md extend context correctly 1`] =
         style="margin-right:8px;padding-bottom:8px"
       >
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
@@ -5107,7 +5107,7 @@ exports[`renders ./components/input/demo/focus.md extend context correctly 1`] =
         style="margin-right:8px;padding-bottom:8px"
       >
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
@@ -5120,7 +5120,7 @@ exports[`renders ./components/input/demo/focus.md extend context correctly 1`] =
         style="margin-right:8px;padding-bottom:8px"
       >
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
@@ -5133,7 +5133,7 @@ exports[`renders ./components/input/demo/focus.md extend context correctly 1`] =
         style="margin-right:8px;padding-bottom:8px"
       >
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
@@ -5262,7 +5262,7 @@ exports[`renders ./components/input/demo/group.md extend context correctly 1`] =
       value="git@github.com:ant-design/ant-design.git"
     />
     <button
-      class="ant-btn ant-btn-icon-only"
+      class="ant-btn ant-btn-default ant-btn-icon-only"
       type="button"
     >
       <span
@@ -5510,7 +5510,7 @@ exports[`renders ./components/input/demo/group.md extend context correctly 1`] =
           class="ant-input-group-addon"
         >
           <button
-            class="ant-btn ant-btn-icon-only ant-input-search-button"
+            class="ant-btn ant-btn-default ant-btn-icon-only ant-input-search-button"
             type="button"
           >
             <span
@@ -5580,7 +5580,7 @@ exports[`renders ./components/input/demo/group.md extend context correctly 1`] =
           class="ant-input-group-addon"
         >
           <button
-            class="ant-btn ant-btn-icon-only ant-input-search-button"
+            class="ant-btn ant-btn-default ant-btn-icon-only ant-input-search-button"
             type="button"
           >
             <span
@@ -8886,7 +8886,7 @@ exports[`renders ./components/input/demo/search-input.md extend context correctl
           class="ant-input-group-addon"
         >
           <button
-            class="ant-btn ant-btn-icon-only ant-input-search-button"
+            class="ant-btn ant-btn-default ant-btn-icon-only ant-input-search-button"
             type="button"
           >
             <span
@@ -8962,7 +8962,7 @@ exports[`renders ./components/input/demo/search-input.md extend context correctl
           class="ant-input-group-addon"
         >
           <button
-            class="ant-btn ant-btn-icon-only ant-input-search-button"
+            class="ant-btn ant-btn-default ant-btn-icon-only ant-input-search-button"
             type="button"
           >
             <span
@@ -9043,7 +9043,7 @@ exports[`renders ./components/input/demo/search-input.md extend context correctl
           class="ant-input-group-addon"
         >
           <button
-            class="ant-btn ant-btn-icon-only ant-input-search-button"
+            class="ant-btn ant-btn-default ant-btn-icon-only ant-input-search-button"
             type="button"
           >
             <span
@@ -9255,7 +9255,7 @@ Array [
         class="ant-input-group-addon"
       >
         <button
-          class="ant-btn ant-btn-icon-only ant-btn-loading ant-input-search-button"
+          class="ant-btn ant-btn-default ant-btn-icon-only ant-btn-loading ant-input-search-button"
           type="button"
         >
           <span
@@ -9539,7 +9539,7 @@ exports[`renders ./components/input/demo/textarea.md extend context correctly 1`
 exports[`renders ./components/input/demo/textarea-resize.md extend context correctly 1`] = `
 Array [
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     style="margin-bottom:16px"
     type="button"
   >
diff --git a/components/input/__tests__/__snapshots__/demo.test.js.snap b/components/input/__tests__/__snapshots__/demo.test.js.snap
index 186e859af6..8df6ddb3fd 100644
--- a/components/input/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/input/__tests__/__snapshots__/demo.test.js.snap
@@ -1311,7 +1311,7 @@ exports[`renders ./components/input/demo/focus.md correctly 1`] = `
         style="margin-right:8px;padding-bottom:8px"
       >
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
@@ -1324,7 +1324,7 @@ exports[`renders ./components/input/demo/focus.md correctly 1`] = `
         style="margin-right:8px;padding-bottom:8px"
       >
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
@@ -1337,7 +1337,7 @@ exports[`renders ./components/input/demo/focus.md correctly 1`] = `
         style="margin-right:8px;padding-bottom:8px"
       >
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
@@ -1350,7 +1350,7 @@ exports[`renders ./components/input/demo/focus.md correctly 1`] = `
         style="margin-right:8px;padding-bottom:8px"
       >
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
@@ -1479,7 +1479,7 @@ exports[`renders ./components/input/demo/group.md correctly 1`] = `
       value="git@github.com:ant-design/ant-design.git"
     />
     <button
-      class="ant-btn ant-btn-icon-only"
+      class="ant-btn ant-btn-default ant-btn-icon-only"
       type="button"
     >
       <span
@@ -1621,7 +1621,7 @@ exports[`renders ./components/input/demo/group.md correctly 1`] = `
           class="ant-input-group-addon"
         >
           <button
-            class="ant-btn ant-btn-icon-only ant-input-search-button"
+            class="ant-btn ant-btn-default ant-btn-icon-only ant-input-search-button"
             type="button"
           >
             <span
@@ -1691,7 +1691,7 @@ exports[`renders ./components/input/demo/group.md correctly 1`] = `
           class="ant-input-group-addon"
         >
           <button
-            class="ant-btn ant-btn-icon-only ant-input-search-button"
+            class="ant-btn ant-btn-default ant-btn-icon-only ant-input-search-button"
             type="button"
           >
             <span
@@ -2660,7 +2660,7 @@ exports[`renders ./components/input/demo/search-input.md correctly 1`] = `
           class="ant-input-group-addon"
         >
           <button
-            class="ant-btn ant-btn-icon-only ant-input-search-button"
+            class="ant-btn ant-btn-default ant-btn-icon-only ant-input-search-button"
             type="button"
           >
             <span
@@ -2736,7 +2736,7 @@ exports[`renders ./components/input/demo/search-input.md correctly 1`] = `
           class="ant-input-group-addon"
         >
           <button
-            class="ant-btn ant-btn-icon-only ant-input-search-button"
+            class="ant-btn ant-btn-default ant-btn-icon-only ant-input-search-button"
             type="button"
           >
             <span
@@ -2817,7 +2817,7 @@ exports[`renders ./components/input/demo/search-input.md correctly 1`] = `
           class="ant-input-group-addon"
         >
           <button
-            class="ant-btn ant-btn-icon-only ant-input-search-button"
+            class="ant-btn ant-btn-default ant-btn-icon-only ant-input-search-button"
             type="button"
           >
             <span
@@ -3029,7 +3029,7 @@ Array [
         class="ant-input-group-addon"
       >
         <button
-          class="ant-btn ant-btn-icon-only ant-btn-loading ant-input-search-button"
+          class="ant-btn ant-btn-default ant-btn-icon-only ant-btn-loading ant-input-search-button"
           type="button"
         >
           <span
@@ -3313,7 +3313,7 @@ exports[`renders ./components/input/demo/textarea.md correctly 1`] = `
 exports[`renders ./components/input/demo/textarea-resize.md correctly 1`] = `
 Array [
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     style="margin-bottom:16px"
     type="button"
   >
diff --git a/components/locale-provider/__tests__/__snapshots__/index.test.js.snap b/components/locale-provider/__tests__/__snapshots__/index.test.js.snap
index 13e7a6f06b..8de740a492 100644
--- a/components/locale-provider/__tests__/__snapshots__/index.test.js.snap
+++ b/components/locale-provider/__tests__/__snapshots__/index.test.js.snap
@@ -5351,7 +5351,7 @@ exports[`Locale Provider should display the text as ar 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -6915,7 +6915,7 @@ exports[`Locale Provider should display the text as ar 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -10428,7 +10428,7 @@ exports[`Locale Provider should display the text as az 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -11992,7 +11992,7 @@ exports[`Locale Provider should display the text as az 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -15505,7 +15505,7 @@ exports[`Locale Provider should display the text as bg 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -17069,7 +17069,7 @@ exports[`Locale Provider should display the text as bg 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -20582,7 +20582,7 @@ exports[`Locale Provider should display the text as bn-bd 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -22146,7 +22146,7 @@ exports[`Locale Provider should display the text as bn-bd 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -25659,7 +25659,7 @@ exports[`Locale Provider should display the text as by 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -27223,7 +27223,7 @@ exports[`Locale Provider should display the text as by 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -30736,7 +30736,7 @@ exports[`Locale Provider should display the text as ca 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -32300,7 +32300,7 @@ exports[`Locale Provider should display the text as ca 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -35813,7 +35813,7 @@ exports[`Locale Provider should display the text as cs 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -37377,7 +37377,7 @@ exports[`Locale Provider should display the text as cs 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -40890,7 +40890,7 @@ exports[`Locale Provider should display the text as da 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -42454,7 +42454,7 @@ exports[`Locale Provider should display the text as da 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -45967,7 +45967,7 @@ exports[`Locale Provider should display the text as de 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -47531,7 +47531,7 @@ exports[`Locale Provider should display the text as de 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -51044,7 +51044,7 @@ exports[`Locale Provider should display the text as el 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -52608,7 +52608,7 @@ exports[`Locale Provider should display the text as el 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -56121,7 +56121,7 @@ exports[`Locale Provider should display the text as en 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -57685,7 +57685,7 @@ exports[`Locale Provider should display the text as en 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -61198,7 +61198,7 @@ exports[`Locale Provider should display the text as en-gb 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -62762,7 +62762,7 @@ exports[`Locale Provider should display the text as en-gb 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -66275,7 +66275,7 @@ exports[`Locale Provider should display the text as es 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -67839,7 +67839,7 @@ exports[`Locale Provider should display the text as es 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -71352,7 +71352,7 @@ exports[`Locale Provider should display the text as et 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -72916,7 +72916,7 @@ exports[`Locale Provider should display the text as et 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -76429,7 +76429,7 @@ exports[`Locale Provider should display the text as fa 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -77993,7 +77993,7 @@ exports[`Locale Provider should display the text as fa 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -81506,7 +81506,7 @@ exports[`Locale Provider should display the text as fi 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -83070,7 +83070,7 @@ exports[`Locale Provider should display the text as fi 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -86583,7 +86583,7 @@ exports[`Locale Provider should display the text as fr 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -88147,7 +88147,7 @@ exports[`Locale Provider should display the text as fr 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -91660,7 +91660,7 @@ exports[`Locale Provider should display the text as fr 2`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -93224,7 +93224,7 @@ exports[`Locale Provider should display the text as fr 2`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -96737,7 +96737,7 @@ exports[`Locale Provider should display the text as fr 3`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -98301,7 +98301,7 @@ exports[`Locale Provider should display the text as fr 3`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -101814,7 +101814,7 @@ exports[`Locale Provider should display the text as ga 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -103378,7 +103378,7 @@ exports[`Locale Provider should display the text as ga 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -106891,7 +106891,7 @@ exports[`Locale Provider should display the text as gl 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -108455,7 +108455,7 @@ exports[`Locale Provider should display the text as gl 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -111968,7 +111968,7 @@ exports[`Locale Provider should display the text as he 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -113532,7 +113532,7 @@ exports[`Locale Provider should display the text as he 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -117045,7 +117045,7 @@ exports[`Locale Provider should display the text as hi 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -118609,7 +118609,7 @@ exports[`Locale Provider should display the text as hi 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -122122,7 +122122,7 @@ exports[`Locale Provider should display the text as hr 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -123686,7 +123686,7 @@ exports[`Locale Provider should display the text as hr 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -127199,7 +127199,7 @@ exports[`Locale Provider should display the text as hu 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -128763,7 +128763,7 @@ exports[`Locale Provider should display the text as hu 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -132276,7 +132276,7 @@ exports[`Locale Provider should display the text as hy-am 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -133840,7 +133840,7 @@ exports[`Locale Provider should display the text as hy-am 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -137353,7 +137353,7 @@ exports[`Locale Provider should display the text as id 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -138917,7 +138917,7 @@ exports[`Locale Provider should display the text as id 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -142430,7 +142430,7 @@ exports[`Locale Provider should display the text as is 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -143994,7 +143994,7 @@ exports[`Locale Provider should display the text as is 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -147507,7 +147507,7 @@ exports[`Locale Provider should display the text as it 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -149071,7 +149071,7 @@ exports[`Locale Provider should display the text as it 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -152584,7 +152584,7 @@ exports[`Locale Provider should display the text as ja 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -154148,7 +154148,7 @@ exports[`Locale Provider should display the text as ja 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -157661,7 +157661,7 @@ exports[`Locale Provider should display the text as ka 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -159225,7 +159225,7 @@ exports[`Locale Provider should display the text as ka 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -162738,7 +162738,7 @@ exports[`Locale Provider should display the text as kk 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -164302,7 +164302,7 @@ exports[`Locale Provider should display the text as kk 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -167815,7 +167815,7 @@ exports[`Locale Provider should display the text as km 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -169379,7 +169379,7 @@ exports[`Locale Provider should display the text as km 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -172892,7 +172892,7 @@ exports[`Locale Provider should display the text as kn 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -174456,7 +174456,7 @@ exports[`Locale Provider should display the text as kn 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -177969,7 +177969,7 @@ exports[`Locale Provider should display the text as ko 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -179533,7 +179533,7 @@ exports[`Locale Provider should display the text as ko 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -183046,7 +183046,7 @@ exports[`Locale Provider should display the text as ku 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -184610,7 +184610,7 @@ exports[`Locale Provider should display the text as ku 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -188123,7 +188123,7 @@ exports[`Locale Provider should display the text as ku-iq 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -189687,7 +189687,7 @@ exports[`Locale Provider should display the text as ku-iq 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -193200,7 +193200,7 @@ exports[`Locale Provider should display the text as lt 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -194764,7 +194764,7 @@ exports[`Locale Provider should display the text as lt 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -198277,7 +198277,7 @@ exports[`Locale Provider should display the text as lv 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -199841,7 +199841,7 @@ exports[`Locale Provider should display the text as lv 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -203354,7 +203354,7 @@ exports[`Locale Provider should display the text as mk 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -204918,7 +204918,7 @@ exports[`Locale Provider should display the text as mk 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -208431,7 +208431,7 @@ exports[`Locale Provider should display the text as ml 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -209995,7 +209995,7 @@ exports[`Locale Provider should display the text as ml 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -213508,7 +213508,7 @@ exports[`Locale Provider should display the text as mn-mn 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -215072,7 +215072,7 @@ exports[`Locale Provider should display the text as mn-mn 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -218585,7 +218585,7 @@ exports[`Locale Provider should display the text as ms-my 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -220149,7 +220149,7 @@ exports[`Locale Provider should display the text as ms-my 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -223662,7 +223662,7 @@ exports[`Locale Provider should display the text as nb 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -225226,7 +225226,7 @@ exports[`Locale Provider should display the text as nb 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -228739,7 +228739,7 @@ exports[`Locale Provider should display the text as ne-np 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -230303,7 +230303,7 @@ exports[`Locale Provider should display the text as ne-np 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -233816,7 +233816,7 @@ exports[`Locale Provider should display the text as nl 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -235380,7 +235380,7 @@ exports[`Locale Provider should display the text as nl 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -238893,7 +238893,7 @@ exports[`Locale Provider should display the text as nl-be 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -240457,7 +240457,7 @@ exports[`Locale Provider should display the text as nl-be 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -243970,7 +243970,7 @@ exports[`Locale Provider should display the text as pl 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -245534,7 +245534,7 @@ exports[`Locale Provider should display the text as pl 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -249047,7 +249047,7 @@ exports[`Locale Provider should display the text as pt 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -250611,7 +250611,7 @@ exports[`Locale Provider should display the text as pt 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -254124,7 +254124,7 @@ exports[`Locale Provider should display the text as pt-br 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -255688,7 +255688,7 @@ exports[`Locale Provider should display the text as pt-br 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -259201,7 +259201,7 @@ exports[`Locale Provider should display the text as ro 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -260765,7 +260765,7 @@ exports[`Locale Provider should display the text as ro 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -264278,7 +264278,7 @@ exports[`Locale Provider should display the text as ru 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -265842,7 +265842,7 @@ exports[`Locale Provider should display the text as ru 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -269355,7 +269355,7 @@ exports[`Locale Provider should display the text as sk 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -270919,7 +270919,7 @@ exports[`Locale Provider should display the text as sk 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -274432,7 +274432,7 @@ exports[`Locale Provider should display the text as sl 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -275996,7 +275996,7 @@ exports[`Locale Provider should display the text as sl 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -279509,7 +279509,7 @@ exports[`Locale Provider should display the text as sr 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -281073,7 +281073,7 @@ exports[`Locale Provider should display the text as sr 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -284586,7 +284586,7 @@ exports[`Locale Provider should display the text as sv 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -286150,7 +286150,7 @@ exports[`Locale Provider should display the text as sv 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -289663,7 +289663,7 @@ exports[`Locale Provider should display the text as ta 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -291227,7 +291227,7 @@ exports[`Locale Provider should display the text as ta 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -294740,7 +294740,7 @@ exports[`Locale Provider should display the text as th 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -296304,7 +296304,7 @@ exports[`Locale Provider should display the text as th 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -299817,7 +299817,7 @@ exports[`Locale Provider should display the text as tr 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -301381,7 +301381,7 @@ exports[`Locale Provider should display the text as tr 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -304894,7 +304894,7 @@ exports[`Locale Provider should display the text as uk 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -306458,7 +306458,7 @@ exports[`Locale Provider should display the text as uk 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -309971,7 +309971,7 @@ exports[`Locale Provider should display the text as ur 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -311535,7 +311535,7 @@ exports[`Locale Provider should display the text as ur 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -315048,7 +315048,7 @@ exports[`Locale Provider should display the text as vi 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -316612,7 +316612,7 @@ exports[`Locale Provider should display the text as vi 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -320125,7 +320125,7 @@ exports[`Locale Provider should display the text as zh-cn 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -321689,7 +321689,7 @@ exports[`Locale Provider should display the text as zh-cn 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -325202,7 +325202,7 @@ exports[`Locale Provider should display the text as zh-hk 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -326766,7 +326766,7 @@ exports[`Locale Provider should display the text as zh-hk 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
@@ -330279,7 +330279,7 @@ exports[`Locale Provider should display the text as zh-tw 1`] = `
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -331843,7 +331843,7 @@ exports[`Locale Provider should display the text as zh-tw 1`] = `
             class="ant-modal-footer"
           >
             <button
-              class="ant-btn"
+              class="ant-btn ant-btn-default"
               type="button"
             >
               <span>
diff --git a/components/mentions/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/mentions/__tests__/__snapshots__/demo-extend.test.ts.snap
index 1ac579e19d..b4fa0ec84f 100644
--- a/components/mentions/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/mentions/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -137,7 +137,7 @@ exports[`renders ./components/mentions/demo/form.md extend context correctly 1`]
           </button>
              
           <button
-            class="ant-btn"
+            class="ant-btn ant-btn-default"
             type="button"
           >
             <span>
diff --git a/components/mentions/__tests__/__snapshots__/demo.test.js.snap b/components/mentions/__tests__/__snapshots__/demo.test.js.snap
index cbc7404939..8440ca56a2 100644
--- a/components/mentions/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/mentions/__tests__/__snapshots__/demo.test.js.snap
@@ -137,7 +137,7 @@ exports[`renders ./components/mentions/demo/form.md correctly 1`] = `
           </button>
              
           <button
-            class="ant-btn"
+            class="ant-btn ant-btn-default"
             type="button"
           >
             <span>
diff --git a/components/message/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/message/__tests__/__snapshots__/demo-extend.test.ts.snap
index 466199a057..aaf34e8b5c 100644
--- a/components/message/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/message/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -2,7 +2,7 @@
 
 exports[`renders ./components/message/demo/custom-style.md extend context correctly 1`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span>
@@ -13,7 +13,7 @@ exports[`renders ./components/message/demo/custom-style.md extend context correc
 
 exports[`renders ./components/message/demo/duration.md extend context correctly 1`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span>
@@ -46,7 +46,7 @@ exports[`renders ./components/message/demo/info.md extend context correctly 1`]
 
 exports[`renders ./components/message/demo/loading.md extend context correctly 1`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span>
@@ -64,7 +64,7 @@ exports[`renders ./components/message/demo/other.md extend context correctly 1`]
     style="margin-right:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -77,7 +77,7 @@ exports[`renders ./components/message/demo/other.md extend context correctly 1`]
     style="margin-right:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -89,7 +89,7 @@ exports[`renders ./components/message/demo/other.md extend context correctly 1`]
     class="ant-space-item"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -102,7 +102,7 @@ exports[`renders ./components/message/demo/other.md extend context correctly 1`]
 
 exports[`renders ./components/message/demo/thenable.md extend context correctly 1`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span>
diff --git a/components/message/__tests__/__snapshots__/demo.test.js.snap b/components/message/__tests__/__snapshots__/demo.test.js.snap
index 20ad7eb7e3..fb50c7859a 100644
--- a/components/message/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/message/__tests__/__snapshots__/demo.test.js.snap
@@ -2,7 +2,7 @@
 
 exports[`renders ./components/message/demo/custom-style.md correctly 1`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span>
@@ -13,7 +13,7 @@ exports[`renders ./components/message/demo/custom-style.md correctly 1`] = `
 
 exports[`renders ./components/message/demo/duration.md correctly 1`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span>
@@ -46,7 +46,7 @@ exports[`renders ./components/message/demo/info.md correctly 1`] = `
 
 exports[`renders ./components/message/demo/loading.md correctly 1`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span>
@@ -64,7 +64,7 @@ exports[`renders ./components/message/demo/other.md correctly 1`] = `
     style="margin-right:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -77,7 +77,7 @@ exports[`renders ./components/message/demo/other.md correctly 1`] = `
     style="margin-right:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -89,7 +89,7 @@ exports[`renders ./components/message/demo/other.md correctly 1`] = `
     class="ant-space-item"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -102,7 +102,7 @@ exports[`renders ./components/message/demo/other.md correctly 1`] = `
 
 exports[`renders ./components/message/demo/thenable.md correctly 1`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span>
diff --git a/components/modal/__tests__/__snapshots__/Modal.test.js.snap b/components/modal/__tests__/__snapshots__/Modal.test.js.snap
index c73b489c08..ce43823dd2 100644
--- a/components/modal/__tests__/__snapshots__/Modal.test.js.snap
+++ b/components/modal/__tests__/__snapshots__/Modal.test.js.snap
@@ -69,7 +69,7 @@ exports[`Modal render correctly 1`] = `
                 class="ant-modal-footer"
               >
                 <button
-                  class="ant-btn"
+                  class="ant-btn ant-btn-default"
                   type="button"
                 >
                   <span>
@@ -225,7 +225,7 @@ exports[`Modal support closeIcon 1`] = `
           class="ant-modal-footer"
         >
           <button
-            class="ant-btn"
+            class="ant-btn ant-btn-default"
             type="button"
           >
             <span>
diff --git a/components/modal/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/modal/__tests__/__snapshots__/demo-extend.test.ts.snap
index 8e95a247a0..e542b889b3 100644
--- a/components/modal/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/modal/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -43,7 +43,7 @@ exports[`renders ./components/modal/demo/confirm.md extend context correctly 1`]
     style="margin-right:8px;padding-bottom:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -56,7 +56,7 @@ exports[`renders ./components/modal/demo/confirm.md extend context correctly 1`]
     style="margin-right:8px;padding-bottom:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -95,7 +95,7 @@ exports[`renders ./components/modal/demo/confirm.md extend context correctly 1`]
 
 exports[`renders ./components/modal/demo/confirm-router.md extend context correctly 1`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span>
@@ -135,7 +135,7 @@ exports[`renders ./components/modal/demo/hooks.md extend context correctly 1`] =
     style="margin-right:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -148,7 +148,7 @@ exports[`renders ./components/modal/demo/hooks.md extend context correctly 1`] =
     style="margin-right:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -161,7 +161,7 @@ exports[`renders ./components/modal/demo/hooks.md extend context correctly 1`] =
     style="margin-right:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -173,7 +173,7 @@ exports[`renders ./components/modal/demo/hooks.md extend context correctly 1`] =
     class="ant-space-item"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -194,7 +194,7 @@ exports[`renders ./components/modal/demo/info.md extend context correctly 1`] =
     style="margin-right:8px;padding-bottom:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -207,7 +207,7 @@ exports[`renders ./components/modal/demo/info.md extend context correctly 1`] =
     style="margin-right:8px;padding-bottom:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -220,7 +220,7 @@ exports[`renders ./components/modal/demo/info.md extend context correctly 1`] =
     style="margin-right:8px;padding-bottom:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -233,7 +233,7 @@ exports[`renders ./components/modal/demo/info.md extend context correctly 1`] =
     style="padding-bottom:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -265,7 +265,7 @@ exports[`renders ./components/modal/demo/locale.md extend context correctly 1`]
     class="ant-space-item"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -278,7 +278,7 @@ exports[`renders ./components/modal/demo/locale.md extend context correctly 1`]
 
 exports[`renders ./components/modal/demo/manual.md extend context correctly 1`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span>
@@ -289,7 +289,7 @@ exports[`renders ./components/modal/demo/manual.md extend context correctly 1`]
 
 exports[`renders ./components/modal/demo/modal-render.md extend context correctly 1`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span>
diff --git a/components/modal/__tests__/__snapshots__/demo.test.js.snap b/components/modal/__tests__/__snapshots__/demo.test.js.snap
index ff51051b2a..69f56e5901 100644
--- a/components/modal/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/modal/__tests__/__snapshots__/demo.test.js.snap
@@ -43,7 +43,7 @@ exports[`renders ./components/modal/demo/confirm.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -56,7 +56,7 @@ exports[`renders ./components/modal/demo/confirm.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -95,7 +95,7 @@ exports[`renders ./components/modal/demo/confirm.md correctly 1`] = `
 
 exports[`renders ./components/modal/demo/confirm-router.md correctly 1`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span>
@@ -135,7 +135,7 @@ exports[`renders ./components/modal/demo/hooks.md correctly 1`] = `
     style="margin-right:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -148,7 +148,7 @@ exports[`renders ./components/modal/demo/hooks.md correctly 1`] = `
     style="margin-right:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -161,7 +161,7 @@ exports[`renders ./components/modal/demo/hooks.md correctly 1`] = `
     style="margin-right:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -173,7 +173,7 @@ exports[`renders ./components/modal/demo/hooks.md correctly 1`] = `
     class="ant-space-item"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -194,7 +194,7 @@ exports[`renders ./components/modal/demo/info.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -207,7 +207,7 @@ exports[`renders ./components/modal/demo/info.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -220,7 +220,7 @@ exports[`renders ./components/modal/demo/info.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -233,7 +233,7 @@ exports[`renders ./components/modal/demo/info.md correctly 1`] = `
     style="padding-bottom:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -265,7 +265,7 @@ exports[`renders ./components/modal/demo/locale.md correctly 1`] = `
     class="ant-space-item"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -278,7 +278,7 @@ exports[`renders ./components/modal/demo/locale.md correctly 1`] = `
 
 exports[`renders ./components/modal/demo/manual.md correctly 1`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span>
@@ -289,7 +289,7 @@ exports[`renders ./components/modal/demo/manual.md correctly 1`] = `
 
 exports[`renders ./components/modal/demo/modal-render.md correctly 1`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span>
diff --git a/components/notification/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/notification/__tests__/__snapshots__/demo-extend.test.ts.snap
index 00ddf7235f..55b6e2fd12 100644
--- a/components/notification/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/notification/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -361,7 +361,7 @@ exports[`renders ./components/notification/demo/with-icon.md extend context corr
     style="margin-right:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -374,7 +374,7 @@ exports[`renders ./components/notification/demo/with-icon.md extend context corr
     style="margin-right:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -387,7 +387,7 @@ exports[`renders ./components/notification/demo/with-icon.md extend context corr
     style="margin-right:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -399,7 +399,7 @@ exports[`renders ./components/notification/demo/with-icon.md extend context corr
     class="ant-space-item"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
diff --git a/components/notification/__tests__/__snapshots__/demo.test.js.snap b/components/notification/__tests__/__snapshots__/demo.test.js.snap
index 5659351ece..7717828a77 100644
--- a/components/notification/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/notification/__tests__/__snapshots__/demo.test.js.snap
@@ -361,7 +361,7 @@ exports[`renders ./components/notification/demo/with-icon.md correctly 1`] = `
     style="margin-right:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -374,7 +374,7 @@ exports[`renders ./components/notification/demo/with-icon.md correctly 1`] = `
     style="margin-right:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -387,7 +387,7 @@ exports[`renders ./components/notification/demo/with-icon.md correctly 1`] = `
     style="margin-right:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -399,7 +399,7 @@ exports[`renders ./components/notification/demo/with-icon.md correctly 1`] = `
     class="ant-space-item"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
diff --git a/components/page-header/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/page-header/__tests__/__snapshots__/demo-extend.test.ts.snap
index c35fce913f..23b5f206f9 100644
--- a/components/page-header/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/page-header/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -59,7 +59,7 @@ Array [
         class="ant-page-header-heading-extra"
       >
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
@@ -67,7 +67,7 @@ Array [
           </span>
         </button>
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
@@ -273,7 +273,7 @@ Array [
         class="ant-page-header-heading-extra"
       >
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
@@ -281,7 +281,7 @@ Array [
           </span>
         </button>
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
@@ -621,7 +621,7 @@ exports[`renders ./components/page-header/demo/content.md extend context correct
       class="ant-page-header-heading-extra"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
@@ -629,7 +629,7 @@ exports[`renders ./components/page-header/demo/content.md extend context correct
         </span>
       </button>
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
@@ -645,7 +645,7 @@ exports[`renders ./components/page-header/demo/content.md extend context correct
         </span>
       </button>
       <button
-        class="ant-btn ant-dropdown-trigger"
+        class="ant-btn ant-btn-default ant-dropdown-trigger"
         style="border:none;padding:0"
         type="button"
       >
@@ -1001,7 +1001,7 @@ exports[`renders ./components/page-header/demo/ghost.md extend context correctly
         class="ant-page-header-heading-extra"
       >
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
@@ -1009,7 +1009,7 @@ exports[`renders ./components/page-header/demo/ghost.md extend context correctly
           </span>
         </button>
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
@@ -1209,7 +1209,7 @@ exports[`renders ./components/page-header/demo/responsive.md extend context corr
       class="ant-page-header-heading-extra"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
@@ -1217,7 +1217,7 @@ exports[`renders ./components/page-header/demo/responsive.md extend context corr
         </span>
       </button>
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
diff --git a/components/page-header/__tests__/__snapshots__/demo.test.js.snap b/components/page-header/__tests__/__snapshots__/demo.test.js.snap
index 4a46047a8b..13297d3ab8 100644
--- a/components/page-header/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/page-header/__tests__/__snapshots__/demo.test.js.snap
@@ -59,7 +59,7 @@ Array [
         class="ant-page-header-heading-extra"
       >
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
@@ -67,7 +67,7 @@ Array [
           </span>
         </button>
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
@@ -273,7 +273,7 @@ Array [
         class="ant-page-header-heading-extra"
       >
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
@@ -281,7 +281,7 @@ Array [
           </span>
         </button>
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
@@ -621,7 +621,7 @@ exports[`renders ./components/page-header/demo/content.md correctly 1`] = `
       class="ant-page-header-heading-extra"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
@@ -629,7 +629,7 @@ exports[`renders ./components/page-header/demo/content.md correctly 1`] = `
         </span>
       </button>
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
@@ -645,7 +645,7 @@ exports[`renders ./components/page-header/demo/content.md correctly 1`] = `
         </span>
       </button>
       <button
-        class="ant-btn ant-dropdown-trigger"
+        class="ant-btn ant-btn-default ant-dropdown-trigger"
         style="border:none;padding:0"
         type="button"
       >
@@ -799,7 +799,7 @@ exports[`renders ./components/page-header/demo/ghost.md correctly 1`] = `
         class="ant-page-header-heading-extra"
       >
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
@@ -807,7 +807,7 @@ exports[`renders ./components/page-header/demo/ghost.md correctly 1`] = `
           </span>
         </button>
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
@@ -1007,7 +1007,7 @@ exports[`renders ./components/page-header/demo/responsive.md correctly 1`] = `
       class="ant-page-header-heading-extra"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
@@ -1015,7 +1015,7 @@ exports[`renders ./components/page-header/demo/responsive.md correctly 1`] = `
         </span>
       </button>
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
diff --git a/components/popconfirm/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/popconfirm/__tests__/__snapshots__/demo-extend.test.ts.snap
index e93a8bb3d5..1f8a149cd4 100644
--- a/components/popconfirm/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/popconfirm/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -64,7 +64,7 @@ Array [
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -149,7 +149,7 @@ Array [
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -234,7 +234,7 @@ exports[`renders ./components/popconfirm/demo/dynamic-trigger.md extend context
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -339,7 +339,7 @@ Array [
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -424,7 +424,7 @@ Array [
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
@@ -456,7 +456,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
     style="margin-left:70px;white-space:nowrap"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -517,7 +517,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
                 class="ant-popover-buttons"
               >
                 <button
-                  class="ant-btn ant-btn-sm"
+                  class="ant-btn ant-btn-default ant-btn-sm"
                   type="button"
                 >
                   <span>
@@ -539,7 +539,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -600,7 +600,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
                 class="ant-popover-buttons"
               >
                 <button
-                  class="ant-btn ant-btn-sm"
+                  class="ant-btn ant-btn-default ant-btn-sm"
                   type="button"
                 >
                   <span>
@@ -622,7 +622,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -683,7 +683,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
                 class="ant-popover-buttons"
               >
                 <button
-                  class="ant-btn ant-btn-sm"
+                  class="ant-btn ant-btn-default ant-btn-sm"
                   type="button"
                 >
                   <span>
@@ -709,7 +709,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
     style="width:70px;float:left"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -770,7 +770,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
                 class="ant-popover-buttons"
               >
                 <button
-                  class="ant-btn ant-btn-sm"
+                  class="ant-btn ant-btn-default ant-btn-sm"
                   type="button"
                 >
                   <span>
@@ -792,7 +792,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -853,7 +853,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
                 class="ant-popover-buttons"
               >
                 <button
-                  class="ant-btn ant-btn-sm"
+                  class="ant-btn ant-btn-default ant-btn-sm"
                   type="button"
                 >
                   <span>
@@ -875,7 +875,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -936,7 +936,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
                 class="ant-popover-buttons"
               >
                 <button
-                  class="ant-btn ant-btn-sm"
+                  class="ant-btn ant-btn-default ant-btn-sm"
                   type="button"
                 >
                   <span>
@@ -962,7 +962,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
     style="width:70px;margin-left:304px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1023,7 +1023,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
                 class="ant-popover-buttons"
               >
                 <button
-                  class="ant-btn ant-btn-sm"
+                  class="ant-btn ant-btn-default ant-btn-sm"
                   type="button"
                 >
                   <span>
@@ -1045,7 +1045,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1106,7 +1106,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
                 class="ant-popover-buttons"
               >
                 <button
-                  class="ant-btn ant-btn-sm"
+                  class="ant-btn ant-btn-default ant-btn-sm"
                   type="button"
                 >
                   <span>
@@ -1128,7 +1128,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1189,7 +1189,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
                 class="ant-popover-buttons"
               >
                 <button
-                  class="ant-btn ant-btn-sm"
+                  class="ant-btn ant-btn-default ant-btn-sm"
                   type="button"
                 >
                   <span>
@@ -1215,7 +1215,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
     style="margin-left:70px;clear:both;white-space:nowrap"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1276,7 +1276,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
                 class="ant-popover-buttons"
               >
                 <button
-                  class="ant-btn ant-btn-sm"
+                  class="ant-btn ant-btn-default ant-btn-sm"
                   type="button"
                 >
                   <span>
@@ -1298,7 +1298,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1359,7 +1359,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
                 class="ant-popover-buttons"
               >
                 <button
-                  class="ant-btn ant-btn-sm"
+                  class="ant-btn ant-btn-default ant-btn-sm"
                   type="button"
                 >
                   <span>
@@ -1381,7 +1381,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1442,7 +1442,7 @@ exports[`renders ./components/popconfirm/demo/placement.md extend context correc
                 class="ant-popover-buttons"
               >
                 <button
-                  class="ant-btn ant-btn-sm"
+                  class="ant-btn ant-btn-default ant-btn-sm"
                   type="button"
                 >
                   <span>
@@ -1531,7 +1531,7 @@ Array [
               class="ant-popover-buttons"
             >
               <button
-                class="ant-btn ant-btn-sm"
+                class="ant-btn ant-btn-default ant-btn-sm"
                 type="button"
               >
                 <span>
diff --git a/components/popconfirm/__tests__/__snapshots__/demo.test.js.snap b/components/popconfirm/__tests__/__snapshots__/demo.test.js.snap
index ea79b71bf1..ca5d35422b 100644
--- a/components/popconfirm/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/popconfirm/__tests__/__snapshots__/demo.test.js.snap
@@ -69,7 +69,7 @@ exports[`renders ./components/popconfirm/demo/placement.md correctly 1`] = `
     style="margin-left:70px;white-space:nowrap"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -77,7 +77,7 @@ exports[`renders ./components/popconfirm/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -85,7 +85,7 @@ exports[`renders ./components/popconfirm/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -97,7 +97,7 @@ exports[`renders ./components/popconfirm/demo/placement.md correctly 1`] = `
     style="width:70px;float:left"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -105,7 +105,7 @@ exports[`renders ./components/popconfirm/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -113,7 +113,7 @@ exports[`renders ./components/popconfirm/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -125,7 +125,7 @@ exports[`renders ./components/popconfirm/demo/placement.md correctly 1`] = `
     style="width:70px;margin-left:304px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -133,7 +133,7 @@ exports[`renders ./components/popconfirm/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -141,7 +141,7 @@ exports[`renders ./components/popconfirm/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -153,7 +153,7 @@ exports[`renders ./components/popconfirm/demo/placement.md correctly 1`] = `
     style="margin-left:70px;clear:both;white-space:nowrap"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -161,7 +161,7 @@ exports[`renders ./components/popconfirm/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -169,7 +169,7 @@ exports[`renders ./components/popconfirm/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
diff --git a/components/popconfirm/__tests__/__snapshots__/index.test.js.snap b/components/popconfirm/__tests__/__snapshots__/index.test.js.snap
index 46ad172ace..004b24fc4d 100644
--- a/components/popconfirm/__tests__/__snapshots__/index.test.js.snap
+++ b/components/popconfirm/__tests__/__snapshots__/index.test.js.snap
@@ -2,8 +2,8 @@
 
 exports[`Popconfirm rtl render component should be rendered correctly in RTL direction 1`] = `<span />`;
 
-exports[`Popconfirm should show overlay when trigger is clicked 1`] = `"<div class=\\"ant-popover-content\\"><div class=\\"ant-popover-arrow\\"><span class=\\"ant-popover-arrow-content\\"></span></div><div class=\\"ant-popover-inner\\" role=\\"tooltip\\"><div class=\\"ant-popover-inner-content\\"><div class=\\"ant-popover-message\\"><span role=\\"img\\" aria-label=\\"exclamation-circle\\" class=\\"anticon anticon-exclamation-circle\\"><svg viewBox=\\"64 64 896 896\\" focusable=\\"false\\" data-icon=\\"exclamation-circle\\" width=\\"1em\\" height=\\"1em\\" fill=\\"currentColor\\" aria-hidden=\\"true\\"><path d=\\"M512 64C264.6 64 64 264.6 64 512s200.6 448 448 448 448-200.6 448-448S759.4 64 512 64zm-32 232c0-4.4 3.6-8 8-8h48c4.4 0 8 3.6 8 8v272c0 4.4-3.6 8-8 8h-48c-4.4 0-8-3.6-8-8V296zm32 440a48.01 48.01 0 010-96 48.01 48.01 0 010 96z\\"></path></svg></span><div class=\\"ant-popover-message-title\\">code</div></div><div class=\\"ant-popover-buttons\\"><button type=\\"button\\" class=\\"ant-btn ant-btn-sm\\"><span>Cancel</span></button><button type=\\"button\\" class=\\"ant-btn ant-btn-primary ant-btn-sm\\"><span>OK</span></button></div></div></div></div>"`;
+exports[`Popconfirm should show overlay when trigger is clicked 1`] = `"<div class=\\"ant-popover-content\\"><div class=\\"ant-popover-arrow\\"><span class=\\"ant-popover-arrow-content\\"></span></div><div class=\\"ant-popover-inner\\" role=\\"tooltip\\"><div class=\\"ant-popover-inner-content\\"><div class=\\"ant-popover-message\\"><span role=\\"img\\" aria-label=\\"exclamation-circle\\" class=\\"anticon anticon-exclamation-circle\\"><svg viewBox=\\"64 64 896 896\\" focusable=\\"false\\" data-icon=\\"exclamation-circle\\" width=\\"1em\\" height=\\"1em\\" fill=\\"currentColor\\" aria-hidden=\\"true\\"><path d=\\"M512 64C264.6 64 64 264.6 64 512s200.6 448 448 448 448-200.6 448-448S759.4 64 512 64zm-32 232c0-4.4 3.6-8 8-8h48c4.4 0 8 3.6 8 8v272c0 4.4-3.6 8-8 8h-48c-4.4 0-8-3.6-8-8V296zm32 440a48.01 48.01 0 010-96 48.01 48.01 0 010 96z\\"></path></svg></span><div class=\\"ant-popover-message-title\\">code</div></div><div class=\\"ant-popover-buttons\\"><button type=\\"button\\" class=\\"ant-btn ant-btn-default ant-btn-sm\\"><span>Cancel</span></button><button type=\\"button\\" class=\\"ant-btn ant-btn-primary ant-btn-sm\\"><span>OK</span></button></div></div></div></div>"`;
 
-exports[`Popconfirm should show overlay when trigger is clicked 2`] = `"<div class=\\"ant-popover-content\\"><div class=\\"ant-popover-arrow\\"><span class=\\"ant-popover-arrow-content\\"></span></div><div class=\\"ant-popover-inner\\" role=\\"tooltip\\"><div class=\\"ant-popover-inner-content\\"><div class=\\"ant-popover-message\\"><span role=\\"img\\" aria-label=\\"exclamation-circle\\" class=\\"anticon anticon-exclamation-circle\\"><svg viewBox=\\"64 64 896 896\\" focusable=\\"false\\" data-icon=\\"exclamation-circle\\" width=\\"1em\\" height=\\"1em\\" fill=\\"currentColor\\" aria-hidden=\\"true\\"><path d=\\"M512 64C264.6 64 64 264.6 64 512s200.6 448 448 448 448-200.6 448-448S759.4 64 512 64zm-32 232c0-4.4 3.6-8 8-8h48c4.4 0 8 3.6 8 8v272c0 4.4-3.6 8-8 8h-48c-4.4 0-8-3.6-8-8V296zm32 440a48.01 48.01 0 010-96 48.01 48.01 0 010 96z\\"></path></svg></span><div class=\\"ant-popover-message-title\\">code</div></div><div class=\\"ant-popover-buttons\\"><button type=\\"button\\" class=\\"ant-btn ant-btn-sm\\"><span>Cancel</span></button><button type=\\"button\\" class=\\"ant-btn ant-btn-primary ant-btn-sm\\"><span>OK</span></button></div></div></div></div>"`;
+exports[`Popconfirm should show overlay when trigger is clicked 2`] = `"<div class=\\"ant-popover-content\\"><div class=\\"ant-popover-arrow\\"><span class=\\"ant-popover-arrow-content\\"></span></div><div class=\\"ant-popover-inner\\" role=\\"tooltip\\"><div class=\\"ant-popover-inner-content\\"><div class=\\"ant-popover-message\\"><span role=\\"img\\" aria-label=\\"exclamation-circle\\" class=\\"anticon anticon-exclamation-circle\\"><svg viewBox=\\"64 64 896 896\\" focusable=\\"false\\" data-icon=\\"exclamation-circle\\" width=\\"1em\\" height=\\"1em\\" fill=\\"currentColor\\" aria-hidden=\\"true\\"><path d=\\"M512 64C264.6 64 64 264.6 64 512s200.6 448 448 448 448-200.6 448-448S759.4 64 512 64zm-32 232c0-4.4 3.6-8 8-8h48c4.4 0 8 3.6 8 8v272c0 4.4-3.6 8-8 8h-48c-4.4 0-8-3.6-8-8V296zm32 440a48.01 48.01 0 010-96 48.01 48.01 0 010 96z\\"></path></svg></span><div class=\\"ant-popover-message-title\\">code</div></div><div class=\\"ant-popover-buttons\\"><button type=\\"button\\" class=\\"ant-btn ant-btn-default ant-btn-sm\\"><span>Cancel</span></button><button type=\\"button\\" class=\\"ant-btn ant-btn-primary ant-btn-sm\\"><span>OK</span></button></div></div></div></div>"`;
 
-exports[`Popconfirm shows content for render functions 1`] = `"<div class=\\"ant-popover-content\\"><div class=\\"ant-popover-arrow\\"><span class=\\"ant-popover-arrow-content\\"></span></div><div class=\\"ant-popover-inner\\" role=\\"tooltip\\"><div class=\\"ant-popover-inner-content\\"><div class=\\"ant-popover-message\\"><span role=\\"img\\" aria-label=\\"exclamation-circle\\" class=\\"anticon anticon-exclamation-circle\\"><svg viewBox=\\"64 64 896 896\\" focusable=\\"false\\" data-icon=\\"exclamation-circle\\" width=\\"1em\\" height=\\"1em\\" fill=\\"currentColor\\" aria-hidden=\\"true\\"><path d=\\"M512 64C264.6 64 64 264.6 64 512s200.6 448 448 448 448-200.6 448-448S759.4 64 512 64zm-32 232c0-4.4 3.6-8 8-8h48c4.4 0 8 3.6 8 8v272c0 4.4-3.6 8-8 8h-48c-4.4 0-8-3.6-8-8V296zm32 440a48.01 48.01 0 010-96 48.01 48.01 0 010 96z\\"></path></svg></span><div class=\\"ant-popover-message-title\\">some-title</div></div><div class=\\"ant-popover-buttons\\"><button type=\\"button\\" class=\\"ant-btn ant-btn-sm\\"><span>Cancel</span></button><button type=\\"button\\" class=\\"ant-btn ant-btn-primary ant-btn-sm\\"><span>OK</span></button></div></div></div></div>"`;
+exports[`Popconfirm shows content for render functions 1`] = `"<div class=\\"ant-popover-content\\"><div class=\\"ant-popover-arrow\\"><span class=\\"ant-popover-arrow-content\\"></span></div><div class=\\"ant-popover-inner\\" role=\\"tooltip\\"><div class=\\"ant-popover-inner-content\\"><div class=\\"ant-popover-message\\"><span role=\\"img\\" aria-label=\\"exclamation-circle\\" class=\\"anticon anticon-exclamation-circle\\"><svg viewBox=\\"64 64 896 896\\" focusable=\\"false\\" data-icon=\\"exclamation-circle\\" width=\\"1em\\" height=\\"1em\\" fill=\\"currentColor\\" aria-hidden=\\"true\\"><path d=\\"M512 64C264.6 64 64 264.6 64 512s200.6 448 448 448 448-200.6 448-448S759.4 64 512 64zm-32 232c0-4.4 3.6-8 8-8h48c4.4 0 8 3.6 8 8v272c0 4.4-3.6 8-8 8h-48c-4.4 0-8-3.6-8-8V296zm32 440a48.01 48.01 0 010-96 48.01 48.01 0 010 96z\\"></path></svg></span><div class=\\"ant-popover-message-title\\">some-title</div></div><div class=\\"ant-popover-buttons\\"><button type=\\"button\\" class=\\"ant-btn ant-btn-default ant-btn-sm\\"><span>Cancel</span></button><button type=\\"button\\" class=\\"ant-btn ant-btn-primary ant-btn-sm\\"><span>OK</span></button></div></div></div></div>"`;
diff --git a/components/popover/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/popover/__tests__/__snapshots__/demo-extend.test.ts.snap
index 2e2b45f83a..55286e6bd0 100644
--- a/components/popover/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/popover/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -3,7 +3,7 @@
 exports[`renders ./components/popover/demo/arrow-point-at-center.md extend context correctly 1`] = `
 Array [
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -49,7 +49,7 @@ Array [
     </div>
   </div>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -201,7 +201,7 @@ Array [
 exports[`renders ./components/popover/demo/hover-with-click.md extend context correctly 1`] = `
 Array [
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -294,7 +294,7 @@ exports[`renders ./components/popover/demo/placement.md extend context correctly
     style="margin-left:70px;white-space:nowrap"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -344,7 +344,7 @@ exports[`renders ./components/popover/demo/placement.md extend context correctly
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -394,7 +394,7 @@ exports[`renders ./components/popover/demo/placement.md extend context correctly
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -448,7 +448,7 @@ exports[`renders ./components/popover/demo/placement.md extend context correctly
     style="width:70px;float:left"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -498,7 +498,7 @@ exports[`renders ./components/popover/demo/placement.md extend context correctly
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -548,7 +548,7 @@ exports[`renders ./components/popover/demo/placement.md extend context correctly
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -602,7 +602,7 @@ exports[`renders ./components/popover/demo/placement.md extend context correctly
     style="width:70px;margin-left:304px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -652,7 +652,7 @@ exports[`renders ./components/popover/demo/placement.md extend context correctly
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -702,7 +702,7 @@ exports[`renders ./components/popover/demo/placement.md extend context correctly
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -756,7 +756,7 @@ exports[`renders ./components/popover/demo/placement.md extend context correctly
     style="margin-left:70px;clear:both;white-space:nowrap"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -806,7 +806,7 @@ exports[`renders ./components/popover/demo/placement.md extend context correctly
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -856,7 +856,7 @@ exports[`renders ./components/popover/demo/placement.md extend context correctly
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -912,7 +912,7 @@ exports[`renders ./components/popover/demo/placement.md extend context correctly
 exports[`renders ./components/popover/demo/triggerType.md extend context correctly 1`] = `
 <div>
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -960,7 +960,7 @@ exports[`renders ./components/popover/demo/triggerType.md extend context correct
     </div>
   </div>
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -1008,7 +1008,7 @@ exports[`renders ./components/popover/demo/triggerType.md extend context correct
     </div>
   </div>
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
diff --git a/components/popover/__tests__/__snapshots__/demo.test.js.snap b/components/popover/__tests__/__snapshots__/demo.test.js.snap
index 086a2fa41f..bf4b03f1ce 100644
--- a/components/popover/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/popover/__tests__/__snapshots__/demo.test.js.snap
@@ -3,7 +3,7 @@
 exports[`renders ./components/popover/demo/arrow-point-at-center.md correctly 1`] = `
 Array [
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -11,7 +11,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -45,7 +45,7 @@ exports[`renders ./components/popover/demo/control.md correctly 1`] = `
 
 exports[`renders ./components/popover/demo/hover-with-click.md correctly 1`] = `
 <button
-  class="ant-btn"
+  class="ant-btn ant-btn-default"
   type="button"
 >
   <span>
@@ -62,7 +62,7 @@ exports[`renders ./components/popover/demo/placement.md correctly 1`] = `
     style="margin-left:70px;white-space:nowrap"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -70,7 +70,7 @@ exports[`renders ./components/popover/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -78,7 +78,7 @@ exports[`renders ./components/popover/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -90,7 +90,7 @@ exports[`renders ./components/popover/demo/placement.md correctly 1`] = `
     style="width:70px;float:left"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -98,7 +98,7 @@ exports[`renders ./components/popover/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -106,7 +106,7 @@ exports[`renders ./components/popover/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -118,7 +118,7 @@ exports[`renders ./components/popover/demo/placement.md correctly 1`] = `
     style="width:70px;margin-left:304px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -126,7 +126,7 @@ exports[`renders ./components/popover/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -134,7 +134,7 @@ exports[`renders ./components/popover/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -146,7 +146,7 @@ exports[`renders ./components/popover/demo/placement.md correctly 1`] = `
     style="margin-left:70px;clear:both;white-space:nowrap"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -154,7 +154,7 @@ exports[`renders ./components/popover/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -162,7 +162,7 @@ exports[`renders ./components/popover/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -176,7 +176,7 @@ exports[`renders ./components/popover/demo/placement.md correctly 1`] = `
 exports[`renders ./components/popover/demo/triggerType.md correctly 1`] = `
 <div>
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -184,7 +184,7 @@ exports[`renders ./components/popover/demo/triggerType.md correctly 1`] = `
     </span>
   </button>
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -192,7 +192,7 @@ exports[`renders ./components/popover/demo/triggerType.md correctly 1`] = `
     </span>
   </button>
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
diff --git a/components/progress/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/progress/__tests__/__snapshots__/demo-extend.test.ts.snap
index f451b1e757..8af9ef5c4d 100644
--- a/components/progress/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/progress/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -261,7 +261,7 @@ Array [
     class="ant-btn-group"
   >
     <button
-      class="ant-btn ant-btn-icon-only"
+      class="ant-btn ant-btn-default ant-btn-icon-only"
       type="button"
     >
       <span
@@ -285,7 +285,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn ant-btn-icon-only"
+      class="ant-btn ant-btn-default ant-btn-icon-only"
       type="button"
     >
       <span
@@ -658,7 +658,7 @@ Array [
     class="ant-btn-group"
   >
     <button
-      class="ant-btn ant-btn-icon-only"
+      class="ant-btn ant-btn-default ant-btn-icon-only"
       type="button"
     >
       <span
@@ -682,7 +682,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn ant-btn-icon-only"
+      class="ant-btn ant-btn-default ant-btn-icon-only"
       type="button"
     >
       <span
diff --git a/components/progress/__tests__/__snapshots__/demo.test.js.snap b/components/progress/__tests__/__snapshots__/demo.test.js.snap
index 63ff0bc978..b4fa85ff12 100644
--- a/components/progress/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/progress/__tests__/__snapshots__/demo.test.js.snap
@@ -261,7 +261,7 @@ Array [
     class="ant-btn-group"
   >
     <button
-      class="ant-btn ant-btn-icon-only"
+      class="ant-btn ant-btn-default ant-btn-icon-only"
       type="button"
     >
       <span
@@ -285,7 +285,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn ant-btn-icon-only"
+      class="ant-btn ant-btn-default ant-btn-icon-only"
       type="button"
     >
       <span
@@ -658,7 +658,7 @@ Array [
     class="ant-btn-group"
   >
     <button
-      class="ant-btn ant-btn-icon-only"
+      class="ant-btn ant-btn-default ant-btn-icon-only"
       type="button"
     >
       <span
@@ -682,7 +682,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn ant-btn-icon-only"
+      class="ant-btn ant-btn-default ant-btn-icon-only"
       type="button"
     >
       <span
diff --git a/components/result/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/result/__tests__/__snapshots__/demo-extend.test.ts.snap
index de0dfb3e25..7b71e470f7 100644
--- a/components/result/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/result/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -1118,7 +1118,7 @@ exports[`renders ./components/result/demo/error.md extend context correctly 1`]
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1305,7 +1305,7 @@ exports[`renders ./components/result/demo/success.md extend context correctly 1`
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
diff --git a/components/result/__tests__/__snapshots__/demo.test.js.snap b/components/result/__tests__/__snapshots__/demo.test.js.snap
index 706911cbd7..7a8a9e7658 100644
--- a/components/result/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/result/__tests__/__snapshots__/demo.test.js.snap
@@ -1118,7 +1118,7 @@ exports[`renders ./components/result/demo/error.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1305,7 +1305,7 @@ exports[`renders ./components/result/demo/success.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
diff --git a/components/select/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/select/__tests__/__snapshots__/demo-extend.test.ts.snap
index 44877b162f..b2dd668aef 100644
--- a/components/select/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/select/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -2428,7 +2428,7 @@ exports[`renders ./components/select/demo/debug.md extend context correctly 1`]
     AntDesign
   </span>
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
diff --git a/components/select/__tests__/__snapshots__/demo.test.js.snap b/components/select/__tests__/__snapshots__/demo.test.js.snap
index 4530c0b237..bc0421d4b0 100644
--- a/components/select/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/select/__tests__/__snapshots__/demo.test.js.snap
@@ -1059,7 +1059,7 @@ exports[`renders ./components/select/demo/debug.md correctly 1`] = `
     AntDesign
   </span>
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
diff --git a/components/skeleton/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/skeleton/__tests__/__snapshots__/demo-extend.test.ts.snap
index 96d8785635..259207bae4 100644
--- a/components/skeleton/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/skeleton/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -61,7 +61,7 @@ exports[`renders ./components/skeleton/demo/children.md extend context correctly
     </p>
   </div>
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
diff --git a/components/skeleton/__tests__/__snapshots__/demo.test.js.snap b/components/skeleton/__tests__/__snapshots__/demo.test.js.snap
index d93c28bb3c..92a75efccb 100644
--- a/components/skeleton/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/skeleton/__tests__/__snapshots__/demo.test.js.snap
@@ -61,7 +61,7 @@ exports[`renders ./components/skeleton/demo/children.md correctly 1`] = `
     </p>
   </div>
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
diff --git a/components/space/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/space/__tests__/__snapshots__/demo-extend.test.ts.snap
index 266b928ddc..e4907f8a9e 100644
--- a/components/space/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/space/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -195,7 +195,7 @@ exports[`renders ./components/space/demo/base.md extend context correctly 1`] =
             type="file"
           />
           <button
-            class="ant-btn"
+            class="ant-btn ant-btn-default"
             type="button"
           >
             <span
@@ -232,7 +232,7 @@ exports[`renders ./components/space/demo/base.md extend context correctly 1`] =
     class="ant-space-item"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -293,7 +293,7 @@ exports[`renders ./components/space/demo/base.md extend context correctly 1`] =
                 class="ant-popover-buttons"
               >
                 <button
-                  class="ant-btn ant-btn-sm"
+                  class="ant-btn ant-btn-default ant-btn-sm"
                   type="button"
                 >
                   <span>
@@ -394,7 +394,7 @@ Array [
       style="margin-right:8px"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
@@ -446,7 +446,7 @@ exports[`renders ./components/space/demo/debug.md extend context correctly 1`] =
     style="margin-right:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -465,7 +465,7 @@ exports[`renders ./components/space/demo/debug.md extend context correctly 1`] =
     style="margin-right:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -526,7 +526,7 @@ exports[`renders ./components/space/demo/debug.md extend context correctly 1`] =
                 class="ant-popover-buttons"
               >
                 <button
-                  class="ant-btn ant-btn-sm"
+                  class="ant-btn ant-btn-default ant-btn-sm"
                   type="button"
                 >
                   <span>
@@ -557,7 +557,7 @@ exports[`renders ./components/space/demo/debug.md extend context correctly 1`] =
       style="display:inline-block;cursor:not-allowed"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         disabled=""
         style="pointer-events:none"
         type="button"
@@ -621,7 +621,7 @@ exports[`renders ./components/space/demo/debug.md extend context correctly 1`] =
                 class="ant-popover-buttons"
               >
                 <button
-                  class="ant-btn ant-btn-sm"
+                  class="ant-btn ant-btn-default ant-btn-sm"
                   type="button"
                 >
                   <span>
@@ -803,7 +803,7 @@ Array [
       style="margin-right:8px"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
@@ -976,7 +976,7 @@ exports[`renders ./components/space/demo/wrap.md extend context correctly 1`] =
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -989,7 +989,7 @@ exports[`renders ./components/space/demo/wrap.md extend context correctly 1`] =
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1002,7 +1002,7 @@ exports[`renders ./components/space/demo/wrap.md extend context correctly 1`] =
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1015,7 +1015,7 @@ exports[`renders ./components/space/demo/wrap.md extend context correctly 1`] =
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1028,7 +1028,7 @@ exports[`renders ./components/space/demo/wrap.md extend context correctly 1`] =
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1041,7 +1041,7 @@ exports[`renders ./components/space/demo/wrap.md extend context correctly 1`] =
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1054,7 +1054,7 @@ exports[`renders ./components/space/demo/wrap.md extend context correctly 1`] =
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1067,7 +1067,7 @@ exports[`renders ./components/space/demo/wrap.md extend context correctly 1`] =
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1080,7 +1080,7 @@ exports[`renders ./components/space/demo/wrap.md extend context correctly 1`] =
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1093,7 +1093,7 @@ exports[`renders ./components/space/demo/wrap.md extend context correctly 1`] =
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1106,7 +1106,7 @@ exports[`renders ./components/space/demo/wrap.md extend context correctly 1`] =
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1119,7 +1119,7 @@ exports[`renders ./components/space/demo/wrap.md extend context correctly 1`] =
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1132,7 +1132,7 @@ exports[`renders ./components/space/demo/wrap.md extend context correctly 1`] =
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1145,7 +1145,7 @@ exports[`renders ./components/space/demo/wrap.md extend context correctly 1`] =
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1158,7 +1158,7 @@ exports[`renders ./components/space/demo/wrap.md extend context correctly 1`] =
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1171,7 +1171,7 @@ exports[`renders ./components/space/demo/wrap.md extend context correctly 1`] =
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1184,7 +1184,7 @@ exports[`renders ./components/space/demo/wrap.md extend context correctly 1`] =
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1197,7 +1197,7 @@ exports[`renders ./components/space/demo/wrap.md extend context correctly 1`] =
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1210,7 +1210,7 @@ exports[`renders ./components/space/demo/wrap.md extend context correctly 1`] =
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1223,7 +1223,7 @@ exports[`renders ./components/space/demo/wrap.md extend context correctly 1`] =
     style="padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
diff --git a/components/space/__tests__/__snapshots__/demo.test.js.snap b/components/space/__tests__/__snapshots__/demo.test.js.snap
index e44d7782e7..9a26d2b2cb 100644
--- a/components/space/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/space/__tests__/__snapshots__/demo.test.js.snap
@@ -195,7 +195,7 @@ exports[`renders ./components/space/demo/base.md correctly 1`] = `
             type="file"
           />
           <button
-            class="ant-btn"
+            class="ant-btn ant-btn-default"
             type="button"
           >
             <span
@@ -232,7 +232,7 @@ exports[`renders ./components/space/demo/base.md correctly 1`] = `
     class="ant-space-item"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -295,7 +295,7 @@ Array [
       style="margin-right:8px"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
@@ -347,7 +347,7 @@ exports[`renders ./components/space/demo/debug.md correctly 1`] = `
     style="margin-right:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -366,7 +366,7 @@ exports[`renders ./components/space/demo/debug.md correctly 1`] = `
     style="margin-right:8px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -383,7 +383,7 @@ exports[`renders ./components/space/demo/debug.md correctly 1`] = `
       style="display:inline-block;cursor:not-allowed"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         disabled=""
         style="pointer-events:none"
         type="button"
@@ -554,7 +554,7 @@ Array [
       style="margin-right:8px"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
@@ -727,7 +727,7 @@ exports[`renders ./components/space/demo/wrap.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -740,7 +740,7 @@ exports[`renders ./components/space/demo/wrap.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -753,7 +753,7 @@ exports[`renders ./components/space/demo/wrap.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -766,7 +766,7 @@ exports[`renders ./components/space/demo/wrap.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -779,7 +779,7 @@ exports[`renders ./components/space/demo/wrap.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -792,7 +792,7 @@ exports[`renders ./components/space/demo/wrap.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -805,7 +805,7 @@ exports[`renders ./components/space/demo/wrap.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -818,7 +818,7 @@ exports[`renders ./components/space/demo/wrap.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -831,7 +831,7 @@ exports[`renders ./components/space/demo/wrap.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -844,7 +844,7 @@ exports[`renders ./components/space/demo/wrap.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -857,7 +857,7 @@ exports[`renders ./components/space/demo/wrap.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -870,7 +870,7 @@ exports[`renders ./components/space/demo/wrap.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -883,7 +883,7 @@ exports[`renders ./components/space/demo/wrap.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -896,7 +896,7 @@ exports[`renders ./components/space/demo/wrap.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -909,7 +909,7 @@ exports[`renders ./components/space/demo/wrap.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -922,7 +922,7 @@ exports[`renders ./components/space/demo/wrap.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -935,7 +935,7 @@ exports[`renders ./components/space/demo/wrap.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -948,7 +948,7 @@ exports[`renders ./components/space/demo/wrap.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -961,7 +961,7 @@ exports[`renders ./components/space/demo/wrap.md correctly 1`] = `
     style="margin-right:8px;padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -974,7 +974,7 @@ exports[`renders ./components/space/demo/wrap.md correctly 1`] = `
     style="padding-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
diff --git a/components/steps/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/steps/__tests__/__snapshots__/demo-extend.test.ts.snap
index d449dfe0ec..3a85799724 100644
--- a/components/steps/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/steps/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -1496,7 +1496,7 @@ exports[`renders ./components/steps/demo/progress.md extend context correctly 1`
 exports[`renders ./components/steps/demo/progress-debug.md extend context correctly 1`] = `
 Array [
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -1504,7 +1504,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -1512,7 +1512,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -1520,7 +1520,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -1528,7 +1528,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -1536,7 +1536,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -1544,7 +1544,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
diff --git a/components/steps/__tests__/__snapshots__/demo.test.js.snap b/components/steps/__tests__/__snapshots__/demo.test.js.snap
index 8444128cff..62e26cc1a9 100644
--- a/components/steps/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/steps/__tests__/__snapshots__/demo.test.js.snap
@@ -1376,7 +1376,7 @@ exports[`renders ./components/steps/demo/progress.md correctly 1`] = `
 exports[`renders ./components/steps/demo/progress-debug.md correctly 1`] = `
 Array [
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -1384,7 +1384,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -1392,7 +1392,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -1400,7 +1400,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -1408,7 +1408,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -1416,7 +1416,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -1424,7 +1424,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
diff --git a/components/table/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/table/__tests__/__snapshots__/demo-extend.test.ts.snap
index a69bedafd0..24fa04674c 100644
--- a/components/table/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/table/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -1363,7 +1363,7 @@ exports[`renders ./components/table/demo/custom-filter-panel.md extend context c
                                   style="margin-right:8px"
                                 >
                                   <button
-                                    class="ant-btn ant-btn-sm"
+                                    class="ant-btn ant-btn-default ant-btn-sm"
                                     style="width:90px"
                                     type="button"
                                   >
@@ -1486,7 +1486,7 @@ exports[`renders ./components/table/demo/custom-filter-panel.md extend context c
                                   style="margin-right:8px"
                                 >
                                   <button
-                                    class="ant-btn ant-btn-sm"
+                                    class="ant-btn ant-btn-default ant-btn-sm"
                                     style="width:90px"
                                     type="button"
                                   >
@@ -1687,7 +1687,7 @@ exports[`renders ./components/table/demo/custom-filter-panel.md extend context c
                                   style="margin-right:8px"
                                 >
                                   <button
-                                    class="ant-btn ant-btn-sm"
+                                    class="ant-btn ant-btn-default ant-btn-sm"
                                     style="width:90px"
                                     type="button"
                                   >
@@ -4766,7 +4766,7 @@ exports[`renders ./components/table/demo/edit-cell.md extend context correctly 1
                                   class="ant-popover-buttons"
                                 >
                                   <button
-                                    class="ant-btn ant-btn-sm"
+                                    class="ant-btn ant-btn-default ant-btn-sm"
                                     type="button"
                                   >
                                     <span>
@@ -4873,7 +4873,7 @@ exports[`renders ./components/table/demo/edit-cell.md extend context correctly 1
                                   class="ant-popover-buttons"
                                 >
                                   <button
-                                    class="ant-btn ant-btn-sm"
+                                    class="ant-btn ant-btn-default ant-btn-sm"
                                     type="button"
                                   >
                                     <span>
@@ -16424,7 +16424,7 @@ Array [
       style="margin-right:8px"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
@@ -16437,7 +16437,7 @@ Array [
       style="margin-right:8px"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
@@ -16449,7 +16449,7 @@ Array [
       class="ant-space-item"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
diff --git a/components/table/__tests__/__snapshots__/demo.test.js.snap b/components/table/__tests__/__snapshots__/demo.test.js.snap
index 5a33e70d63..154f2d538f 100644
--- a/components/table/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/table/__tests__/__snapshots__/demo.test.js.snap
@@ -13144,7 +13144,7 @@ Array [
       style="margin-right:8px"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
@@ -13157,7 +13157,7 @@ Array [
       style="margin-right:8px"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
@@ -13169,7 +13169,7 @@ Array [
       class="ant-space-item"
     >
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span>
diff --git a/components/tabs/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/tabs/__tests__/__snapshots__/demo-extend.test.ts.snap
index d625b1b2f6..ba07286225 100644
--- a/components/tabs/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/tabs/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -594,7 +594,7 @@ exports[`renders ./components/tabs/demo/custom-add-trigger.md extend context cor
     style="margin-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1601,7 +1601,7 @@ Array [
         class="ant-tabs-extra-content"
       >
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
@@ -1708,7 +1708,7 @@ Array [
         class="ant-tabs-extra-content"
       >
         <button
-          class="ant-btn tabs-extra-demo-button"
+          class="ant-btn ant-btn-default tabs-extra-demo-button"
           type="button"
         >
           <span>
@@ -1822,7 +1822,7 @@ Array [
         class="ant-tabs-extra-content"
       >
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
diff --git a/components/tabs/__tests__/__snapshots__/demo.test.js.snap b/components/tabs/__tests__/__snapshots__/demo.test.js.snap
index a7aa88b5fa..0b3a6273ae 100644
--- a/components/tabs/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/tabs/__tests__/__snapshots__/demo.test.js.snap
@@ -518,7 +518,7 @@ exports[`renders ./components/tabs/demo/custom-add-trigger.md correctly 1`] = `
     style="margin-bottom:16px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1411,7 +1411,7 @@ Array [
         class="ant-tabs-extra-content"
       >
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
@@ -1518,7 +1518,7 @@ Array [
         class="ant-tabs-extra-content"
       >
         <button
-          class="ant-btn tabs-extra-demo-button"
+          class="ant-btn ant-btn-default tabs-extra-demo-button"
           type="button"
         >
           <span>
@@ -1613,7 +1613,7 @@ Array [
         class="ant-tabs-extra-content"
       >
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span>
diff --git a/components/tag/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/tag/__tests__/__snapshots__/demo-extend.test.ts.snap
index a9ca7cb093..19510d5410 100644
--- a/components/tag/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/tag/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -528,7 +528,7 @@ Array [
   </span>,
   <br />,
   <button
-    class="ant-btn ant-btn-sm"
+    class="ant-btn ant-btn-default ant-btn-sm"
     type="button"
   >
     <span>
diff --git a/components/tag/__tests__/__snapshots__/demo.test.js.snap b/components/tag/__tests__/__snapshots__/demo.test.js.snap
index 771cb2461f..e748f67c2b 100644
--- a/components/tag/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/tag/__tests__/__snapshots__/demo.test.js.snap
@@ -528,7 +528,7 @@ Array [
   </span>,
   <br />,
   <button
-    class="ant-btn ant-btn-sm"
+    class="ant-btn ant-btn-default ant-btn-sm"
     type="button"
   >
     <span>
diff --git a/components/tooltip/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/tooltip/__tests__/__snapshots__/demo-extend.test.ts.snap
index 7297275a19..ef424197dd 100644
--- a/components/tooltip/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/tooltip/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -3,7 +3,7 @@
 exports[`renders ./components/tooltip/demo/arrow-point-at-center.md extend context correctly 1`] = `
 Array [
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -35,7 +35,7 @@ Array [
     </div>
   </div>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -74,7 +74,7 @@ exports[`renders ./components/tooltip/demo/auto-adjust-overflow.md extend contex
   style="overflow:hidden;position:relative;padding:24px;border:1px solid #e9e9e9"
 >
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -107,7 +107,7 @@ exports[`renders ./components/tooltip/demo/auto-adjust-overflow.md extend contex
   </div>
   <br />
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -187,7 +187,7 @@ Array [
   </div>,
   <div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -219,7 +219,7 @@ Array [
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -251,7 +251,7 @@ Array [
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -283,7 +283,7 @@ Array [
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -315,7 +315,7 @@ Array [
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -347,7 +347,7 @@ Array [
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -379,7 +379,7 @@ Array [
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -411,7 +411,7 @@ Array [
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -443,7 +443,7 @@ Array [
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -475,7 +475,7 @@ Array [
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -507,7 +507,7 @@ Array [
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -539,7 +539,7 @@ Array [
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -571,7 +571,7 @@ Array [
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -615,7 +615,7 @@ Array [
   </div>,
   <div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -649,7 +649,7 @@ Array [
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -683,7 +683,7 @@ Array [
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -717,7 +717,7 @@ Array [
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -794,7 +794,7 @@ exports[`renders ./components/tooltip/demo/placement.md extend context correctly
     style="margin-left:70px;white-space:nowrap"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -828,7 +828,7 @@ exports[`renders ./components/tooltip/demo/placement.md extend context correctly
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -862,7 +862,7 @@ exports[`renders ./components/tooltip/demo/placement.md extend context correctly
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -900,7 +900,7 @@ exports[`renders ./components/tooltip/demo/placement.md extend context correctly
     style="width:70px;float:left"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -934,7 +934,7 @@ exports[`renders ./components/tooltip/demo/placement.md extend context correctly
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -968,7 +968,7 @@ exports[`renders ./components/tooltip/demo/placement.md extend context correctly
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1006,7 +1006,7 @@ exports[`renders ./components/tooltip/demo/placement.md extend context correctly
     style="width:70px;margin-left:304px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1040,7 +1040,7 @@ exports[`renders ./components/tooltip/demo/placement.md extend context correctly
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1074,7 +1074,7 @@ exports[`renders ./components/tooltip/demo/placement.md extend context correctly
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1112,7 +1112,7 @@ exports[`renders ./components/tooltip/demo/placement.md extend context correctly
     style="margin-left:70px;clear:both;white-space:nowrap"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1146,7 +1146,7 @@ exports[`renders ./components/tooltip/demo/placement.md extend context correctly
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -1180,7 +1180,7 @@ exports[`renders ./components/tooltip/demo/placement.md extend context correctly
       </div>
     </div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
diff --git a/components/tooltip/__tests__/__snapshots__/demo.test.js.snap b/components/tooltip/__tests__/__snapshots__/demo.test.js.snap
index f7b4428abc..348fb3c4bb 100644
--- a/components/tooltip/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/tooltip/__tests__/__snapshots__/demo.test.js.snap
@@ -3,7 +3,7 @@
 exports[`renders ./components/tooltip/demo/arrow-point-at-center.md correctly 1`] = `
 Array [
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -11,7 +11,7 @@ Array [
     </span>
   </button>,
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -26,7 +26,7 @@ exports[`renders ./components/tooltip/demo/auto-adjust-overflow.md correctly 1`]
   style="overflow:hidden;position:relative;padding:24px;border:1px solid #e9e9e9"
 >
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -35,7 +35,7 @@ exports[`renders ./components/tooltip/demo/auto-adjust-overflow.md correctly 1`]
   </button>
   <br />
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     type="button"
   >
     <span>
@@ -65,7 +65,7 @@ Array [
   </div>,
   <div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -73,7 +73,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -81,7 +81,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -89,7 +89,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -97,7 +97,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -105,7 +105,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -113,7 +113,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -121,7 +121,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -129,7 +129,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -137,7 +137,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -145,7 +145,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -153,7 +153,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -161,7 +161,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -181,7 +181,7 @@ Array [
   </div>,
   <div>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -189,7 +189,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -197,7 +197,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -205,7 +205,7 @@ Array [
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -230,7 +230,7 @@ exports[`renders ./components/tooltip/demo/placement.md correctly 1`] = `
     style="margin-left:70px;white-space:nowrap"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -238,7 +238,7 @@ exports[`renders ./components/tooltip/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -246,7 +246,7 @@ exports[`renders ./components/tooltip/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -258,7 +258,7 @@ exports[`renders ./components/tooltip/demo/placement.md correctly 1`] = `
     style="width:70px;float:left"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -266,7 +266,7 @@ exports[`renders ./components/tooltip/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -274,7 +274,7 @@ exports[`renders ./components/tooltip/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -286,7 +286,7 @@ exports[`renders ./components/tooltip/demo/placement.md correctly 1`] = `
     style="width:70px;margin-left:304px"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -294,7 +294,7 @@ exports[`renders ./components/tooltip/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -302,7 +302,7 @@ exports[`renders ./components/tooltip/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -314,7 +314,7 @@ exports[`renders ./components/tooltip/demo/placement.md correctly 1`] = `
     style="margin-left:70px;clear:both;white-space:nowrap"
   >
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -322,7 +322,7 @@ exports[`renders ./components/tooltip/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
@@ -330,7 +330,7 @@ exports[`renders ./components/tooltip/demo/placement.md correctly 1`] = `
       </span>
     </button>
     <button
-      class="ant-btn"
+      class="ant-btn ant-btn-default"
       type="button"
     >
       <span>
diff --git a/components/tooltip/__tests__/__snapshots__/tooltip.test.js.snap b/components/tooltip/__tests__/__snapshots__/tooltip.test.js.snap
index 776998c5f7..8fb819c3d7 100644
--- a/components/tooltip/__tests__/__snapshots__/tooltip.test.js.snap
+++ b/components/tooltip/__tests__/__snapshots__/tooltip.test.js.snap
@@ -8,7 +8,7 @@ exports[`Tooltip should hide when mouse leave antd disabled component Button 1`]
   style="display: inline-block; cursor: not-allowed;"
 >
   <button
-    class="ant-btn"
+    class="ant-btn ant-btn-default"
     disabled=""
     style="pointer-events: none;"
     type="button"
diff --git a/components/transfer/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/transfer/__tests__/__snapshots__/demo-extend.test.ts.snap
index 05c678f3e7..ef4cbef76f 100644
--- a/components/transfer/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/transfer/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -302,7 +302,7 @@ exports[`renders ./components/transfer/demo/advanced.md extend context correctly
       class="ant-transfer-list-footer"
     >
       <button
-        class="ant-btn ant-btn-sm"
+        class="ant-btn ant-btn-default ant-btn-sm"
         style="float:left;margin:5px"
         type="button"
       >
@@ -670,7 +670,7 @@ exports[`renders ./components/transfer/demo/advanced.md extend context correctly
       class="ant-transfer-list-footer"
     >
       <button
-        class="ant-btn ant-btn-sm"
+        class="ant-btn ant-btn-default ant-btn-sm"
         style="float:right;margin:5px"
         type="button"
       >
diff --git a/components/transfer/__tests__/__snapshots__/demo.test.js.snap b/components/transfer/__tests__/__snapshots__/demo.test.js.snap
index 7be91319e0..992beb9297 100644
--- a/components/transfer/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/transfer/__tests__/__snapshots__/demo.test.js.snap
@@ -173,7 +173,7 @@ exports[`renders ./components/transfer/demo/advanced.md correctly 1`] = `
       class="ant-transfer-list-footer"
     >
       <button
-        class="ant-btn ant-btn-sm"
+        class="ant-btn ant-btn-default ant-btn-sm"
         style="float:left;margin:5px"
         type="button"
       >
@@ -412,7 +412,7 @@ exports[`renders ./components/transfer/demo/advanced.md correctly 1`] = `
       class="ant-transfer-list-footer"
     >
       <button
-        class="ant-btn ant-btn-sm"
+        class="ant-btn ant-btn-default ant-btn-sm"
         style="float:right;margin:5px"
         type="button"
       >
diff --git a/components/tree/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/tree/__tests__/__snapshots__/demo-extend.test.ts.snap
index 724f7d4eba..27e518a331 100644
--- a/components/tree/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/tree/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -3627,7 +3627,7 @@ exports[`renders ./components/tree/demo/search.md extend context correctly 1`] =
         class="ant-input-group-addon"
       >
         <button
-          class="ant-btn ant-btn-icon-only ant-input-search-button"
+          class="ant-btn ant-btn-default ant-btn-icon-only ant-input-search-button"
           type="button"
         >
           <span
diff --git a/components/tree/__tests__/__snapshots__/demo.test.js.snap b/components/tree/__tests__/__snapshots__/demo.test.js.snap
index ace8588f9e..a175fcd4f3 100644
--- a/components/tree/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/tree/__tests__/__snapshots__/demo.test.js.snap
@@ -3627,7 +3627,7 @@ exports[`renders ./components/tree/demo/search.md correctly 1`] = `
         class="ant-input-group-addon"
       >
         <button
-          class="ant-btn ant-btn-icon-only ant-input-search-button"
+          class="ant-btn ant-btn-default ant-btn-icon-only ant-input-search-button"
           type="button"
         >
           <span
diff --git a/components/upload/__tests__/__snapshots__/demo-extend.test.ts.snap b/components/upload/__tests__/__snapshots__/demo-extend.test.ts.snap
index 8a1b0b4063..d43fa5fb08 100644
--- a/components/upload/__tests__/__snapshots__/demo-extend.test.ts.snap
+++ b/components/upload/__tests__/__snapshots__/demo-extend.test.ts.snap
@@ -70,7 +70,7 @@ exports[`renders ./components/upload/demo/basic.md extend context correctly 1`]
         type="file"
       />
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span
@@ -242,7 +242,7 @@ exports[`renders ./components/upload/demo/customize-progress-bar.md extend conte
         type="file"
       />
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span
@@ -294,7 +294,7 @@ exports[`renders ./components/upload/demo/defaultFileList.md extend context corr
         type="file"
       />
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span
@@ -607,7 +607,7 @@ exports[`renders ./components/upload/demo/directory.md extend context correctly
         webkitdirectory="webkitdirectory"
       />
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span
@@ -720,7 +720,7 @@ exports[`renders ./components/upload/demo/drag-sorting.md extend context correct
         type="file"
       />
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span
@@ -1924,7 +1924,7 @@ exports[`renders ./components/upload/demo/fileList.md extend context correctly 1
         type="file"
       />
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span
@@ -2063,7 +2063,7 @@ exports[`renders ./components/upload/demo/max-count.md extend context correctly
             type="file"
           />
           <button
-            class="ant-btn"
+            class="ant-btn ant-btn-default"
             type="button"
           >
             <span
@@ -2117,7 +2117,7 @@ exports[`renders ./components/upload/demo/max-count.md extend context correctly
             type="file"
           />
           <button
-            class="ant-btn"
+            class="ant-btn ant-btn-default"
             type="button"
           >
             <span
@@ -2772,7 +2772,7 @@ Array [
           type="file"
         />
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span
@@ -3007,7 +3007,7 @@ Array [
           type="file"
         />
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span
@@ -3244,7 +3244,7 @@ exports[`renders ./components/upload/demo/preview-file.md extend context correct
         type="file"
       />
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span
@@ -3296,7 +3296,7 @@ exports[`renders ./components/upload/demo/transform-file.md extend context corre
         type="file"
       />
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span
@@ -3348,7 +3348,7 @@ exports[`renders ./components/upload/demo/upload-custom-action-icon.md extend co
         type="file"
       />
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span
@@ -3678,7 +3678,7 @@ Array [
           type="file"
         />
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span
@@ -3741,7 +3741,7 @@ exports[`renders ./components/upload/demo/upload-png-only.md extend context corr
         type="file"
       />
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span
@@ -3819,7 +3819,7 @@ exports[`renders ./components/upload/demo/upload-with-aliyun-oss.md extend conte
                   type="file"
                 />
                 <button
-                  class="ant-btn"
+                  class="ant-btn ant-btn-default"
                   type="button"
                 >
                   <span
diff --git a/components/upload/__tests__/__snapshots__/demo.test.js.snap b/components/upload/__tests__/__snapshots__/demo.test.js.snap
index 95cc62a8c9..d9e77dfba2 100644
--- a/components/upload/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/upload/__tests__/__snapshots__/demo.test.js.snap
@@ -70,7 +70,7 @@ exports[`renders ./components/upload/demo/basic.md correctly 1`] = `
         type="file"
       />
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span
@@ -242,7 +242,7 @@ exports[`renders ./components/upload/demo/customize-progress-bar.md correctly 1`
         type="file"
       />
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span
@@ -294,7 +294,7 @@ exports[`renders ./components/upload/demo/defaultFileList.md correctly 1`] = `
         type="file"
       />
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span
@@ -583,7 +583,7 @@ exports[`renders ./components/upload/demo/directory.md correctly 1`] = `
         webkitdirectory="webkitdirectory"
       />
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span
@@ -696,7 +696,7 @@ exports[`renders ./components/upload/demo/drag-sorting.md correctly 1`] = `
         type="file"
       />
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span
@@ -1804,7 +1804,7 @@ exports[`renders ./components/upload/demo/fileList.md correctly 1`] = `
         type="file"
       />
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span
@@ -1943,7 +1943,7 @@ exports[`renders ./components/upload/demo/max-count.md correctly 1`] = `
             type="file"
           />
           <button
-            class="ant-btn"
+            class="ant-btn ant-btn-default"
             type="button"
           >
             <span
@@ -1997,7 +1997,7 @@ exports[`renders ./components/upload/demo/max-count.md correctly 1`] = `
             type="file"
           />
           <button
-            class="ant-btn"
+            class="ant-btn ant-btn-default"
             type="button"
           >
             <span
@@ -2628,7 +2628,7 @@ Array [
           type="file"
         />
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span
@@ -2839,7 +2839,7 @@ Array [
           type="file"
         />
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span
@@ -3052,7 +3052,7 @@ exports[`renders ./components/upload/demo/preview-file.md correctly 1`] = `
         type="file"
       />
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span
@@ -3104,7 +3104,7 @@ exports[`renders ./components/upload/demo/transform-file.md correctly 1`] = `
         type="file"
       />
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span
@@ -3156,7 +3156,7 @@ exports[`renders ./components/upload/demo/upload-custom-action-icon.md correctly
         type="file"
       />
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span
@@ -3462,7 +3462,7 @@ Array [
           type="file"
         />
         <button
-          class="ant-btn"
+          class="ant-btn ant-btn-default"
           type="button"
         >
           <span
@@ -3525,7 +3525,7 @@ exports[`renders ./components/upload/demo/upload-png-only.md correctly 1`] = `
         type="file"
       />
       <button
-        class="ant-btn"
+        class="ant-btn ant-btn-default"
         type="button"
       >
         <span
@@ -3603,7 +3603,7 @@ exports[`renders ./components/upload/demo/upload-with-aliyun-oss.md correctly 1`
                   type="file"
                 />
                 <button
-                  class="ant-btn"
+                  class="ant-btn ant-btn-default"
                   type="button"
                 >
                   <span