/* * Copyright (c) 2021-2026 ahriman team. * * This file is part of ahriman * (see https://github.com/arcan1s/ahriman). * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ import { type Dispatch, type SetStateAction, useCallback, useState } from "react"; export function useLocalStorage(key: string, initialValue: T): [T, Dispatch>] { const [storedValue, setStoredValue] = useState(() => { try { const item = window.localStorage.getItem(key); return item !== null ? (JSON.parse(item) as T) : initialValue; } catch { return initialValue; } }); const setValue: Dispatch> = useCallback( value => { setStoredValue(prev => { const nextValue = value instanceof Function ? value(prev) : value; window.localStorage.setItem(key, JSON.stringify(nextValue)); return nextValue; }); }, [key], ); return [storedValue, setValue]; }