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What is the purpose of the AbortController in modern Node.js?

Q: What is the purpose of the AbortController in modern Node.js?

**TL;DR.** AbortController provides a **standard way to cancel** async operations. You pass its signal to a cancelable API (fetch, streams, timers, custom code); calling controller.abort() fires the signal's 'abort' event and makes the operation reject with an AbortError . It's the same primitive used in browsers, so the pattern is portable. AbortController .abort() signal <text class='d-text' x='

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Understand the problem

Explain how to cancel ongoing asynchronous tasks such as fetch requests or event listeners.

asyncabortcontrollerpromises

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Cancel a fetch on a timeout or user action

const controller = new AbortController();
const timer = setTimeout(() => controller.abort(), 2000);

try {
  const res = await fetch('https://slow.api/data', { signal: controller.signal });
  return await res.json();
} catch (err) {
  if (err.name === 'AbortError') console.log('request cancelled');
  else throw err;
} finally {
  clearTimeout(timer);
}

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