What is localStorage vs sessionStorage in HTML5?

Short answer: Both store data in the browser, but they differ in duration and scope. Feature localStorage sessionStorage Lifetime Until manually cleared Until the tab is closed Scope Shared across tabs Specific to one tab Capacity ~5–10MB ~5MB

Example code

localStorage.setItem("username", "Sandeep"); sessionStorage.setItem("theme", "dark"); Key Takeaway: Use localStorage for long-term data; sessionStorage for temporary, tab-specific data.

Real-world example (ShopNest)

ShopNest’s browser cart uses modern JavaScript: fetch APIs with async/await, modules, and clear error handling.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.