31 lines
1.3 KiB
JavaScript
31 lines
1.3 KiB
JavaScript
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import * as React from 'react';
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import { useFluent_unstable as useFluent } from '@fluentui/react-shared-contexts';
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const REDUCED_MEDIA_QUERY = 'screen and (prefers-reduced-motion: reduce)';
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// TODO: find a better approach there as each hook creates a separate subscription
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export function useIsReducedMotion() {
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const { targetDocument } = useFluent();
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var _targetDocument_defaultView;
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const targetWindow = (_targetDocument_defaultView = targetDocument === null || targetDocument === void 0 ? void 0 : targetDocument.defaultView) !== null && _targetDocument_defaultView !== void 0 ? _targetDocument_defaultView : null;
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const queryValue = React.useRef(false);
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const isEnabled = React.useCallback(()=>queryValue.current, []);
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React.useEffect(()=>{
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if (targetWindow === null || typeof targetWindow.matchMedia !== 'function') {
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return;
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}
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const queryMatch = targetWindow.matchMedia(REDUCED_MEDIA_QUERY);
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if (queryMatch.matches) {
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queryValue.current = true;
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}
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const matchListener = (e)=>{
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queryValue.current = e.matches;
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};
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queryMatch.addEventListener('change', matchListener);
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return ()=>{
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queryMatch.removeEventListener('change', matchListener);
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};
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}, [
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targetWindow
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]);
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return isEnabled;
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}
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