28 lines
622 B
TypeScript
28 lines
622 B
TypeScript
// Copyright 2020 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import { useEffect, useState } from 'react';
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export function usePageVisibility(): boolean {
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const [result, setResult] = useState(!document.hidden);
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useEffect(() => {
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const updatePageVisibility = () => {
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setResult(!document.hidden);
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};
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updatePageVisibility();
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document.addEventListener('visibilitychange', updatePageVisibility, false);
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return () => {
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document.removeEventListener(
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'visibilitychange',
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updatePageVisibility,
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false
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);
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};
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}, []);
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return result;
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}
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