main
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Last change
on this file was d565449, checked in by stefan toskovski <stefantoska84@…>, 4 weeks ago |
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Update repo after prototype presentation
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Property mode
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100644
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File size:
797 bytes
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| [d565449] | 1 | import { useCallback, useEffect } from 'react';
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| 2 | import { off, on } from './misc/util';
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| 3 | var useBeforeUnload = function (enabled, message) {
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| 4 | if (enabled === void 0) { enabled = true; }
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| 5 | var handler = useCallback(function (event) {
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| 6 | var finalEnabled = typeof enabled === 'function' ? enabled() : true;
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| 7 | if (!finalEnabled) {
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| 8 | return;
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| 9 | }
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| 10 | event.preventDefault();
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| 11 | if (message) {
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| 12 | event.returnValue = message;
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| 13 | }
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| 14 | return message;
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| 15 | }, [enabled, message]);
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| 16 | useEffect(function () {
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| 17 | if (!enabled) {
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| 18 | return;
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| 19 | }
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| 20 | on(window, 'beforeunload', handler);
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| 21 | return function () { return off(window, 'beforeunload', handler); };
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| 22 | }, [enabled, handler]);
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| 23 | };
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| 24 | export default useBeforeUnload;
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