47 lines
1.1 KiB
JavaScript
47 lines
1.1 KiB
JavaScript
import React from 'react';
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var getItem = function getItem(key) {
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try {
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var itemValue = localStorage.getItem(key);
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if (typeof itemValue === 'string') {
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return JSON.parse(itemValue);
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}
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return undefined;
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} catch (_unused) {
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return undefined;
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}
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};
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export default function useLocalStorage(key, defaultValue) {
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var _React$useState = React.useState(),
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value = _React$useState[0],
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setValue = _React$useState[1];
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React.useEffect(function () {
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var initialValue = getItem(key);
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if (typeof initialValue === 'undefined' || initialValue === null) {
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setValue(typeof defaultValue === 'function' ? defaultValue() : defaultValue);
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} else {
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setValue(initialValue);
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}
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}, [defaultValue, key]);
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var setter = React.useCallback(function (updater) {
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setValue(function (old) {
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var newVal = updater;
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if (typeof updater == 'function') {
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newVal = updater(old);
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}
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try {
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localStorage.setItem(key, JSON.stringify(newVal));
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} catch (_unused2) {}
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return newVal;
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});
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}, [key]);
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return [value, setter];
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} |