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Last change
on this file was d565449, checked in by stefan toskovski <stefantoska84@…>, 4 weeks ago |
Update repo after prototype presentation
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100644
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File size:
1.4 KB
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[d565449] | 1 | import { useEffect, useState } from 'react';
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| 2 | import { isBrowser } from './misc/util';
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| 3 | var getInitialState = function (query, defaultState) {
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| 4 | // Prevent a React hydration mismatch when a default value is provided by not defaulting to window.matchMedia(query).matches.
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| 5 | if (defaultState !== undefined) {
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| 6 | return defaultState;
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| 7 | }
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| 8 | if (isBrowser) {
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| 9 | return window.matchMedia(query).matches;
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| 10 | }
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| 11 | // A default value has not been provided, and you are rendering on the server, warn of a possible hydration mismatch when defaulting to false.
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| 12 | if (process.env.NODE_ENV !== 'production') {
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| 13 | console.warn('`useMedia` When server side rendering, defaultState should be defined to prevent a hydration mismatches.');
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| 14 | }
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| 15 | return false;
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| 16 | };
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| 17 | var useMedia = function (query, defaultState) {
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| 18 | var _a = useState(getInitialState(query, defaultState)), state = _a[0], setState = _a[1];
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| 19 | useEffect(function () {
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| 20 | var mounted = true;
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| 21 | var mql = window.matchMedia(query);
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| 22 | var onChange = function () {
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| 23 | if (!mounted) {
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| 24 | return;
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| 25 | }
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| 26 | setState(!!mql.matches);
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| 27 | };
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| 28 | mql.addEventListener('change', onChange);
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| 29 | setState(mql.matches);
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| 30 | return function () {
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| 31 | mounted = false;
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| 32 | mql.removeEventListener('change', onChange);
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| 33 | };
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| 34 | }, [query]);
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| 35 | return state;
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| 36 | };
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| 37 | export default useMedia;
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