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[lexical-website][lexical-y] Bug Fix: Stop a format, comment or link from spreading to the end of the document after an undo or delete races an edit inside it #9505

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Merged
zurfyx merged 3 commits into from
Oct 29, 2026
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[lexical-website][lexical-y] Bug Fix: Stop a format, comment or link from spreading to the end of the document after an undo or delete races an edit inside it #9505

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[lexical-website][lexical-y] Bug Fix: Stop a format, comment or link …
zurfyx Oct 29, 2026
9479566
[lexical-y] Bug Fix: End a run a write opens with its own null where …
zurfyx Oct 29, 2026
603812b
[lexical-y] Bug Fix: Keep a comment's end when a paste and an undo ra…
zurfyx Oct 29, 2026
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7 changes: 7 additions & 0 deletions .changeset/lexical-y-undo-run-end.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,7 @@
---
'@lexical/y': patch
---

[fix] Stop a format, comment or link from spreading to the end of the document in `@lexical/y` when a collaborator edits inside it while it is undone or its end is deleted

Verify: undo a format, a comment or a link, or delete the text at its end, while a collaborator types, pastes or changes a format inside it; on every client, no text past it gets the value.
14 changes: 9 additions & 5 deletions packages/lexical-website/docs/collaboration/y.md
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Expand Up @@ -841,11 +841,15 @@ not merge as a user might expect:
Undoing a format change does not undo a collaborator's later change of
part of its range, nor the value that change restored after itself: color
`abc`, let a collaborator recolor `b`, then undo the color, and `c` keeps
the old color. Where a collaborator overwrote a step of yours entirely,
the undo manager skips that step as changing nothing, and the same undo
also reverts your step before it. When you undo a format change while a
collaborator removes that format and undoes the removal, the text keeps
the format: the collaborator's undo brings it back.
the old color, up to the end of the range (the same holds for text a
collaborator types or pastes inside the range as you undo). Undoing a link
while a collaborator formats text inside it keeps the link on its text:
formatting text in a link also sets the link's text format, which writes
the link there again. Where a collaborator overwrote a step of yours
entirely, the undo manager skips that step as changing nothing, and the
same undo also reverts your step before it. When you undo a format change
while a collaborator removes that format and undoes the removal, the text
keeps the format: the collaborator's undo brings it back.
- **Large lists.** A structural edit in a list costs time proportional to
the list on every client.
- **The caret when a collaborator rewrites its line.** A caret stays after
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