class ExpiringStorage { get(key) { const cached = JSON.parse( localStorage.getItem(key) ); if (!cached) { return null; } const expires = new Date(cached.expires); if (expires < new Date()) { localStorage.removeItem(key); return null; } return cached.value; } set(key, value, lifeTimeInMinutes) { const currentTime = new Date().getTime(); const expires = new Date(currentTime + lifeTimeInMinutes * 60000); localStorage.setItem(key, JSON.stringify({ value, expires })); } } export default new ExpiringStorage();