42 lines
1.2 KiB
TypeScript
42 lines
1.2 KiB
TypeScript
/*
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Copyright 2022 New Vector Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import { useCallback, useRef, useState } from "react";
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import { useEventTarget } from "./useEvents";
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/**
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* @returns Whether the user has requested reduced motion.
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*/
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export const usePrefersReducedMotion = () => {
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const mediaQuery = useRef<MediaQueryList>();
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if (mediaQuery.current === undefined)
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mediaQuery.current = matchMedia("(prefers-reduced-motion)");
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const [prefersReducedMotion, setPrefersReducedMotion] = useState(
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mediaQuery.current.matches
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);
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useEventTarget(
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mediaQuery.current!,
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"change",
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useCallback(
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() => setPrefersReducedMotion(mediaQuery.current!.matches),
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[setPrefersReducedMotion]
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)
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);
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return prefersReducedMotion;
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};
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