Cancel JavaScript Async Ops with AbortController

Introduction to AbortController

The AbortController API is a powerful tool in JavaScript that allows developers to cancel asynchronous operations, such as network requests or long-running tasks, gracefully and efficiently. This capability is crucial for building responsive web applications where users expect immediate feedback and control over their actions.

Key Concepts

• AbortSignal: A signal object used to communicate cancellation requests between an AbortController and the consumers of its signals.
• AbortError: An error thrown when a request or task is cancelled via an AbortSignal.

Basic Usage Example

Here’s how you can use AbortController in a simple scenario:

javascript
 
1// Create an AbortController instance
2const controller = new AbortController();
3const signal = controller.signal;
4
5// Use the signal with fetch API to cancel the network request
6fetch('https://api.example.com/data', { signal })
7  .then(response => response.json())
8  .then(data => console.log(data))
9  .catch(error => {
10    if (error.name === 'AbortError') {
11      console.log('Request was cancelled');
12    } else {
13      console.error('An unexpected error occurred:', error);
14    }
15  });
16
17// Cancel the request after a certain time
18setTimeout
19
20[Read the full article at DEV Community](https://dev.to/maanu07/cancel-javascript-async-ops-with-abortcontroller-3g87)
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