D7849.1765342668.diff
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D7849.1765342668.diff
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	diff --git a/web/chat/edit-text-message.react.js b/web/chat/edit-text-message.react.js
	--- a/web/chat/edit-text-message.react.js
	+++ b/web/chat/edit-text-message.react.js
	@@ -86,15 +86,28 @@
	});
	}, [background, updatePosition]);

	+ const preventCloseTab = React.useCallback(
	+ event => {
	+ if (!isMessageEdited) {
	+ return null;
	+ }
	+ event.preventDefault();
	+ return (event.returnValue = '');
	+ },
	+ [isMessageEdited],
	+ );
	+
	useEffect(() => {
	if (!background) {
	return () => {};
	}
	window.addEventListener('resize', updateDimensions);
	+ window.addEventListener('beforeunload', preventCloseTab);
	return () => {
	window.removeEventListener('resize', updateDimensions);
	+ window.removeEventListener('beforeunload', preventCloseTab);
	};
	- }, [background, updateDimensions]);
	+ }, [background, preventCloseTab, updateDimensions]);

	useEffect(() => {
	updateDimensions();