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How do you avoid callback hell?

Senior JavaScript
Quick Answer Callback hell: deeply nested callbacks that make code hard to read and debug. Solutions: use Promises (flat .then() chains), async/await (reads like sync code), or named functions instead of anonymous callbacks. Modularize: break large callback-heavy functions into smaller named async functions. Promisify legacy callback APIs with util.promisify or manual wrapping.

Answer

Callback hell occurs from deeply nested callbacks. Solutions include:

  • Promises – chain operations instead of nesting.
  • Async/await – write asynchronous code in synchronous style.
  • Modular functions – split logic into reusable functions.
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