use-storage-state/src/memoryStorage.js

React hook that you can wire with any Storage compatible API like `localStorage`, `sessionStorage`, or a custom one.

class MemoryStorage {
    constructor() {
        this.storage = new Map();
    }
    getItem(key) {
        if (this.storage.has(key)) {
            const value = this.storage.get(key);
            return value === undefined ? "undefined" : value;
        }
        return null;
    }
    setItem(key, value) {
        this.storage.set(key, value);
    }
    removeItem(key) {
        this.storage.delete(key);
    }
}
const memoryStorage = new MemoryStorage();
export default memoryStorage;