Markdown toolbar buttons clear the textarea's native undo/redo history #107

New Issue

2026-09-01T00:21:14-04:00

jared commented

2026-09-01 00:21:14 -04:00

Severity: Medium

assets/js/markdown.js (insertMarkdownFormat, insertMarkdownText, toolbarList, toolbarHeading, toolbarQuote, ~lines 360-503) all set textarea.value = ... directly. Assigning .value programmatically discards the browser's native undo stack (vs. document.execCommand('insertText', ...), which preserves it).

Repro: Type a paragraph, click Bold on a selection, then press Ctrl+Z — instead of undoing just the bold markup, the entire typed paragraph disappears (or undo does nothing further), because the whole prior undo history was wiped the moment the toolbar action ran.

Fix: Replace the direct .value = assignment in these toolbar handlers with document.execCommand('insertText', false, newText) (with a fallback to the current approach for browsers where execCommand is unavailable/deprecated) to preserve native undo/redo.

**Severity:** Medium `assets/js/markdown.js` (`insertMarkdownFormat`, `insertMarkdownText`, `toolbarList`, `toolbarHeading`, `toolbarQuote`, ~lines 360-503) all set `textarea.value = ...` directly. Assigning `.value` programmatically discards the browser's native undo stack (vs. `document.execCommand('insertText', ...)`, which preserves it). **Repro:** Type a paragraph, click Bold on a selection, then press Ctrl+Z — instead of undoing just the bold markup, the entire typed paragraph disappears (or undo does nothing further), because the whole prior undo history was wiped the moment the toolbar action ran. **Fix:** Replace the direct `.value =` assignment in these toolbar handlers with `document.execCommand('insertText', false, newText)` (with a fallback to the current approach for browsers where `execCommand` is unavailable/deprecated) to preserve native undo/redo.

jared added the priority/medium ux labels 2026-09-08 10:15:51 -04:00

jared referenced this issue from a commit

2026-09-08 14:35:21 -04:00

Preserve native undo/redo in markdown toolbar buttons (#107)

jared referenced this issue from a commit

2026-09-08 15:39:42 -04:00

Merge development into main: 15-issue triage + fix batch

Sign in to join this conversation.