What is the difference between Object.seal(), Object.freeze(), and Object.preventExtensions()?

Short answer: Method Add Props Modify Delete preventExtensio ns() ❌ No ✅ Yes ✅ Yes seal() ❌ No ✅ Yes ❌ No freeze() ❌ No ❌ No ❌ No

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.