useLocalStorage
Implementation:
import { useState } from "react";
function useLocalStorage<T>(key: string, initialValue: T) {
const [storedValue, setStoredValue] = useState<T>(() => {
try {
const item = window.localStorage.getItem(key);
return item ? JSON.parse(item) : initialValue;
} catch (error) {
console.error(error);
return initialValue;
}
});
const setValue = (value: T) => {
try {
setStoredValue(value);
window.localStorage.setItem(key, JSON.stringify(value));
} catch (error) {
console.error(error);
}
};
return [storedValue, setValue] as const;
}
export default useLocalStorage;Usage:
const [theme, setTheme] = useLocalStorage('theme', 'light');
return (
<button onClick={() => setTheme(theme === 'light' ? 'dark' : 'light')}>
Toggle Theme
</button>
);