From c52a6026fcdd6e3e0867a395ef85a28aa91cd90e Mon Sep 17 00:00:00 2001
From: Nantris <6835891+Nantris@users.noreply.github.com>
Date: Thu, 9 May 2024 09:49:59 -0400
Subject: [PATCH] Prevent history checkpoints during backspace in empty editor
 (#5063)

* Prevent history checkpoints during backspace in empty editor

* Remove errant comment/lint problem
---
 packages/core/src/extensions/keymap.ts | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/packages/core/src/extensions/keymap.ts b/packages/core/src/extensions/keymap.ts
index ad5847230..ec3587d89 100644
--- a/packages/core/src/extensions/keymap.ts
+++ b/packages/core/src/extensions/keymap.ts
@@ -27,7 +27,13 @@ export const Keymap = Extension.create({
           ? parentPos === $anchor.pos
           : Selection.atStart(doc).from === pos
 
-        if (!empty || !isAtStart || !parent.type.isTextblock || parent.textContent.length) {
+        if (
+          !empty
+          || !parent.type.isTextblock
+          || parent.textContent.length
+          || !isAtStart
+          || (isAtStart && $anchor.parent.type.name === 'paragraph') // prevent clearNodes when no nodes to clear, otherwise history stack is appended
+        ) {
           return false
         }