From 2a7b8a36a19e5ae0f67b48667ca0080a3fdd93ed Mon Sep 17 00:00:00 2001
From: yaolongfei <2991205548@qq.com>
Date: Sun, 31 May 2026 16:21:33 +0800
Subject: [PATCH] =?UTF-8?q?fix(core):=20=E4=BF=AE=E5=A4=8D=20divider=20?=
 =?UTF-8?q?=E6=92=A4=E9=94=80=E5=90=8E=E8=BE=93=E5=85=A5=E6=8A=A5=E9=94=99?=
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beforeinput targetRange 映射改为容错模式

补充回归测试覆盖映射失败与 stale DOM 场景

增加 core patch changeset

Closes: #892
---
 .changeset/tough-snails-dance.md              |  5 ++
 .../event-handlers/before-input.test.ts       | 56 +++++++++++++++++++
 .../text-area/event-handlers/beforeInput.ts   | 18 ++++--
 3 files changed, 74 insertions(+), 5 deletions(-)
 create mode 100644 .changeset/tough-snails-dance.md

diff --git a/.changeset/tough-snails-dance.md b/.changeset/tough-snails-dance.md
new file mode 100644
index 000000000..a32eca5e3
--- /dev/null
+++ b/.changeset/tough-snails-dance.md
@@ -0,0 +1,5 @@
+---
+'@wangeditor-next/core': patch
+---
+
+fix beforeinput target range mapping after divider undo to tolerate stale DOM nodes and avoid "Cannot resolve a Slate node from DOM node" errors when typing
diff --git a/packages/core/__tests__/text-area/event-handlers/before-input.test.ts b/packages/core/__tests__/text-area/event-handlers/before-input.test.ts
index 9c897358e..2b7c3fd3e 100644
--- a/packages/core/__tests__/text-area/event-handlers/before-input.test.ts
+++ b/packages/core/__tests__/text-area/event-handlers/before-input.test.ts
@@ -289,6 +289,62 @@ describe('handleBeforeInput', () => {
     expect(Editor.insertText).toHaveBeenCalledWith(editor, 'same')
   })
 
+  it('skips reselection when target range cannot be mapped to Slate', () => {
+    const editor = {
+      selection: createSelection(false),
+      getConfig: () => ({ readOnly: false }),
+      insertData: vi.fn(),
+    } as any
+    const targetRange = { startContainer: document.createTextNode('x') }
+    const event = {
+      inputType: 'insertText',
+      data: 'hello',
+      dataTransfer: null,
+      target: {},
+      preventDefault: vi.fn(),
+      getTargetRanges: () => [targetRange],
+    } as any
+
+    vi.spyOn(helpers, 'hasEditableTarget').mockReturnValue(true)
+    vi.spyOn(DomEditor, 'toSlateRange').mockReturnValue(null as any)
+    vi.spyOn(Transforms, 'select').mockImplementation(() => {})
+    vi.spyOn(Editor, 'insertText').mockImplementation(() => {})
+
+    expect(() => handleBeforeInput(event, {} as any, editor)).not.toThrow()
+    expect(DomEditor.toSlateRange).toHaveBeenCalledWith(editor, targetRange, {
+      exactMatch: false,
+      suppressThrow: true,
+    })
+    expect(Transforms.select).not.toHaveBeenCalled()
+    expect(Editor.insertText).toHaveBeenCalledWith(editor, 'hello')
+  })
+
+  it('does not throw when target range points to stale DOM nodes', () => {
+    const editor = {
+      selection: createSelection(false),
+      getConfig: () => ({ readOnly: false }),
+      insertData: vi.fn(),
+    } as any
+    const targetRange = { startContainer: document.createTextNode('x') }
+    const event = {
+      inputType: 'insertText',
+      data: 'hello',
+      dataTransfer: null,
+      target: {},
+      preventDefault: vi.fn(),
+      getTargetRanges: () => [targetRange],
+    } as any
+
+    vi.spyOn(helpers, 'hasEditableTarget').mockReturnValue(true)
+    vi.spyOn(DomEditor, 'toSlateRange').mockImplementation(() => {
+      throw new Error('Cannot resolve a Slate node from DOM node')
+    })
+    vi.spyOn(Editor, 'insertText').mockImplementation(() => {})
+
+    expect(() => handleBeforeInput(event, {} as any, editor)).not.toThrow()
+    expect(Editor.insertText).toHaveBeenCalledWith(editor, 'hello')
+  })
+
   it('does not delete when selection partially covers a table', () => {
     const editor = {
       selection: createSelection(true),
diff --git a/packages/core/src/text-area/event-handlers/beforeInput.ts b/packages/core/src/text-area/event-handlers/beforeInput.ts
index aea4f6565..a6bb9eed0 100644
--- a/packages/core/src/text-area/event-handlers/beforeInput.ts
+++ b/packages/core/src/text-area/event-handlers/beforeInput.ts
@@ -56,12 +56,20 @@ function handleBeforeInput(e: Event, textarea: TextArea, editor: IDomEditor) {
     const [targetRange] = event.getTargetRanges()
 
     if (targetRange) {
-      const range = DomEditor.toSlateRange(editor, targetRange, {
-        exactMatch: false,
-        suppressThrow: false,
-      })
+      let range: Range | null = null
+
+      try {
+        range = DomEditor.toSlateRange(editor, targetRange, {
+          exactMatch: false,
+          suppressThrow: true,
+        })
+      } catch {
+        // Undo/redo or IME transitions can leave beforeinput target ranges
+        // pointing to stale DOM nodes for a short time.
+        range = null
+      }
 
-      if (!selection || !Range.equals(selection, range)) {
+      if (range && (!selection || !Range.equals(selection, range))) {
         Transforms.select(editor, range)
       }
     }