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React Custom Hook - useLocalStorage

Lv.5619@mukitaro11 playsDec 28, 2025

Custom React hook for localStorage persistence. Common pattern in React apps.

preview.js
JavaScript
1import { useState, useEffect } from 'react';
2
3function useLocalStorage(key, initialValue) {
4 const [storedValue, setStoredValue] = useState(() => {
5 try {
6 const item = window.localStorage.getItem(key);
7 return item ? JSON.parse(item) : initialValue;
8 } catch (error) {
9 console.error(error);
10 return initialValue;
11 }
12 });
13
14 const setValue = (value) => {
15 try {
16 setStoredValue(value);
17 window.localStorage.setItem(key, JSON.stringify(value));
18 } catch (error) {
19 console.error(error);
20 }
21 };
22
23 return [storedValue, setValue];
24}
25
26export default useLocalStorage;

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