From 86c11e5eb54c44c1b63c594a613794426ca3c7df Mon Sep 17 00:00:00 2001
From: afc163 <afc163@gmail.com>
Date: Wed, 17 Oct 2018 11:07:25 +0800
Subject: [PATCH] Fix vertical align issue of empty button

close #12681
---
 components/button/style/index.less | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/components/button/style/index.less b/components/button/style/index.less
index 8057a0a3fa..8fb398bffb 100644
--- a/components/button/style/index.less
+++ b/components/button/style/index.less
@@ -177,6 +177,11 @@
   .christmas&-primary&-sm:before {
     background-size: 56px;
   }
+
+  // https://github.com/ant-design/ant-design/issues/12681
+  &:empty {
+    vertical-align: top;
+  }
 }
 
 a.@{btn-prefix-cls} {