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This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The abort event of the Fetch API is fired when a fetch request is aborted, i.e. using FetchController.abort().

Bubbles No
Cancelable No
Target objects FetchSignal
Interface Event


In the following snippet, we create a new AbortController object, and get its AbortSignal (available in the signal property). Later on we check whether or not it the signal has been aborted using the onabort property, and send an appropriate log to the console.

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

signal.onabort = function() {
  console.log('Request aborted');


The abort event implements the Event interface — it has available the properties and methods defined on this interface.


Specification Status Comment
The definition of 'abort' in that specification.
Living Standard Initial definition

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support


? 57 (57) No support


No support
Feature Android Android Webview Edge Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile Chrome for Android
Basic support No support ? ? 57.0 (57) No support ? No support ?

See also

Document Tags and Contributors

 Contributors to this page: chrisdavidmills
 Last updated by: chrisdavidmills,