56 lines
1.3 KiB
JavaScript
56 lines
1.3 KiB
JavaScript
"use strict";
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var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
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exports.__esModule = true;
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exports.default = useLocalStorage;
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var _react = _interopRequireDefault(require("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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function useLocalStorage(key, defaultValue) {
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var _React$useState = _react.default.useState(),
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value = _React$useState[0],
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setValue = _React$useState[1];
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_react.default.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.default.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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} |