38 lines
1.3 KiB
TypeScript
38 lines
1.3 KiB
TypeScript
/*
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Copyright 2019 The Matrix.org Foundation C.I.C.
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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 {useEffect, useRef, useState} from "react";
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// Hook behaving like useState but persisting the value to localStorage. Returns same as useState
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export const useLocalStorageState = (key: string, initialValue: boolean) => {
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const lsKey = useRef("useLocalStorageState_" + key).current;
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const [value, setValue] = useState(() => {
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try {
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const item = window.localStorage.getItem(lsKey);
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return item ? JSON.parse(item) : initialValue;
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} catch (error) {
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return initialValue;
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}
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});
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useEffect(() => {
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window.localStorage.setItem(lsKey, JSON.stringify(value));
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}, [lsKey, value]);
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return [value, setValue];
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};
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