What are async iterators?

Short answer: Async iterators allow looping over asynchronous data sources. Example: async function* fetchItems() { yield await fetch('/item1'); yield await fetch('/item2'); } for await (let item of fetchItems()) { console.log(item); }

Example code

Async iterators allow looping over asynchronous data sources. Example: async function* fetchItems() { yield await fetch('/item1'); yield await fetch('/item2'); }
for await (let item of fetchItems()) { console.log(item); }

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.