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How do you handle asynchronous operations in JavaScript?

Q: How do you handle asynchronous operations in JavaScript?

**Core concept (TL;DR).** There are three generations of async handling, each fixing the last one's pain: **callbacks** (a function to run when work finishes), **Promises** (a chainable object representing a future value), and **async/await** (syntax that lets you write Promise-based code in a flat, synchronous-looking style). Modern code defaults to async/await. The evolution of async handling 1 · Callbacks

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Assesses knowledge of modern async patterns beyond just callbacks.

asyncpromisesasync/awaitcallbacks

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JSPromise chaining vs async/await + Promise.all

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