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fix: Composer AutoGrow causing the message list to shift #41007

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Merged
dionisio-bot merged 2 commits into from
Jun 20, 2026
+23 −5
Merged

fix: Composer AutoGrow causing the message list to shift #41007

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02ccd1d
fix: Composer AutoGrow causing the message list to shift
MartinSchoeler Jun 18, 2026
edc204b
chore: changeset
MartinSchoeler Jun 18, 2026
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5 changes: 5 additions & 0 deletions .changeset/famous-birds-join.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
"@rocket.chat/meteor": patch
---

Fixes the message list shifting when typing in the fully expanded message composer
23 changes: 18 additions & 5 deletions apps/meteor/client/views/room/MessageList/hooks/useKeepAtBottom.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -15,22 +15,35 @@ export const useKeepAtBottom = (isAtBottom: MutableRefObject<boolean | null>) =>
const keepAtBottomRef = useSafeRefCallback(
useCallback(
(node: HTMLDivElement) => {
const sendToBottom = () => {
if (isAtBottom.current && handleRef.current) {
handleRef.current();
}
};
const listWrapper = node.firstChild;
const observer = new ResizeObserver(() => {
if (isAtBottom.current) {
if (handleRef.current) {
handleRef.current();
}
}
sendToBottom();
});

observer.observe(node);
if (listWrapper instanceof HTMLElement) {
observer.observe(listWrapper);
}

const sendToBottomEvent = (e: Event) => {
if (!(e.target instanceof HTMLElement)) return;
if (!e.target.closest('.rc-message-box')) return;
sendToBottom();
};

// Workaround for height hack in useAutoGrow
// node.style.height = '0';
// node.style.height = `${node.scrollHeight}px`;
window.addEventListener('input', sendToBottomEvent);

return () => {
observer.disconnect();
window.removeEventListener('input', sendToBottomEvent);
};
},
[isAtBottom],
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