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// 1. Namespace keys to avoid conflicts localStorage.setItem("myapp:theme", "dark"); // 2. Always use try/catch around parse function safeGet(key) { try { return JSON.parse(localStorage.getItem(key)); } catch { return null; } } // 3. Handle QuotaExceededError function safeSet(key, val) { try { localStorage.setItem(key, JSON.stringify(val)); } catch (e) { if (e.name === "QuotaExceededError") handleFull(); } } // 4. Clean up expired data const cached = safeGet("cache"); if (cached && cached.expiresAt < Date.now()) { localStorage.removeItem("cache"); }
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