Explain the concept of promises and async flow.

Short answer: A Promise represents a value that may be available now, later, or never. It helps handle asynchronous operations in a cleaner way. Follow me on LinkedIn:

Example code

fetch('/data') .then(res => res.json()) .then(data => console.log(data)) .catch(err => console.error(err)); ✅ async/await simplifies promise syntax.

Real-world example (ShopNest)

The checkout button uses async/await to call /api/orders, shows a spinner, and catches network errors with a toast.

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.