From 58cd8244ba49987beb69ce589e063851530e0770 Mon Sep 17 00:00:00 2001
From: Tyrone Yeh <siryeh@gmail.com>
Date: Thu, 22 Jan 2026 08:24:37 +0800
Subject: [PATCH] Fix markdown newline handling during IME composition (#36421)

### Summary

Fix incorrect newline handling in markdown editor when using IME input.

### Details

While composing text with an IME, pressing Enter should not trigger
markdown indentation logic.
This change skips indentation handling during composition by checking
`e.isComposing`.

This prevents unexpected line breaks and formatting issues for CJK
users.
---
 web_src/js/features/comp/EditorMarkdown.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/web_src/js/features/comp/EditorMarkdown.ts b/web_src/js/features/comp/EditorMarkdown.ts
index da7bbcfef7..cdc9bdaf9a 100644
--- a/web_src/js/features/comp/EditorMarkdown.ts
+++ b/web_src/js/features/comp/EditorMarkdown.ts
@@ -186,6 +186,7 @@ export function markdownHandleIndention(tvs: TextareaValueSelection): MarkdownHa
 }
 
 function handleNewline(textarea: HTMLTextAreaElement, e: KeyboardEvent) {
+  if (e.isComposing) return;
   const ret = markdownHandleIndention({value: textarea.value, selStart: textarea.selectionStart, selEnd: textarea.selectionEnd});
   if (!ret.handled || !ret.valueSelection) return; // FIXME: the "handled" seems redundant, only valueSelection is enough (null for unhandled)
   e.preventDefault();