What are abort controller polyfills and how do I use them?

What are abort controller polyfills and how do I use them?

Abort controller polyfills are JavaScript implementations that allow you to cancel ongoing asynchronous operations. They are useful when you want to abort fetch requests or other promises.

Can you give me an example of how to implement an abort controller polyfill?

Sure! Here's a simple example:

const controller = new AbortController();
const signal = controller.signal;

fetch('https://api.example.com/data', { signal })
  .then(response => response.json())
  .then(data => console.log(data))
  .catch(err => {
    if (err.name === 'AbortError') {
      console.log('Fetch aborted');
    }
  });

// To abort the fetch request:
controller.abort();

Are there any libraries that provide these polyfills?

Yes, libraries like 'abort-controller' and 'abortcontroller-polyfill' can be used to add support for abort controllers in environments that do not support them natively.

What browsers support abort controllers natively?

Abort controllers are natively supported in most modern browsers, including Chrome, Firefox, and Edge. However, older versions of Internet Explorer do not support them.