1. Mozilla
  2. Add-ons
  3. Browser extensions
  4. JavaScript APIs
  5. events

events

Common types used by APIs that dispatch events.

Types

events.Rule

Description of a declarative rule for handling events.

events.Event

An object which allows the addition and removal of listeners for a browser event.

events.UrlFilter

Filters URLs for various criteria. If any of the given criteria match, then the whole filter matches.

Browser compatibility

Chrome
Edge
Firefox
Opera
Safari
Firefox for Android
Safari on iOS
events
Chrome – Full support
Chrome 21 (Release date: 2012-07-31)
footnote Full support
Edge – Full support
Edge 14 (Release date: 2016-08-02)
footnote Full support
Firefox – Full support
Firefox 50 (Release date: 2016-11-15)
footnote Full support
Opera – Full support
Opera 15 (Release date: 2013-07-02)
footnote Full support
Safari – Full support
Safari 14 (Release date: 2020-09-16)
footnote Full support
Firefox for Android – Full support
Firefox for Android 50 (Release date: 2016-11-15)
footnote Full support
Safari on iOS – Full support
Safari on iOS 15 (Release date: 2021-09-20)
footnote Full support
Event
Chrome – Full support
Chrome 21 (Release date: 2012-07-31)
footnote Full support
Edge – Full support
Edge 14 (Release date: 2016-08-02)
footnote Full support
Firefox – Full support
Firefox 53 (Release date: 2017-04-19)
footnote Full support
Opera – Full support
Opera 15 (Release date: 2013-07-02)
footnote Full support
Safari – Full support
Safari 14 (Release date: 2020-09-16)
footnote Full support
Firefox for Android – Full support
Firefox for Android 53 (Release date: 2017-04-19)
footnote Full support
Safari on iOS – Full support
Safari on iOS 15 (Release date: 2021-09-20)
footnote Full support
Event.addListener
Chrome – Full support
Chrome 21 (Release date: 2012-07-31)
footnote Full support
Edge – Full support
Edge 14 (Release date: 2016-08-02)
footnote Full support
Firefox – Full support
Firefox 59 (Release date: 2018-03-13)
footnote Full support
Opera – Full support
Opera 15 (Release date: 2013-07-02)
footnote Full support
Safari – Full support
Safari 14 (Release date: 2020-09-16)
footnote Full support
Firefox for Android – Full support
Firefox for Android 59 (Release date: 2018-03-13)
footnote Full support
Safari on iOS – Full support
Safari on iOS 15 (Release date: 2021-09-20)
footnote Full support
Event.addRules
Chrome – Full support
Chrome 21 (Release date: 2012-07-31)
footnote Full support
Edge – Full support
Edge 79 (Release date: 2020-01-15)
footnote Full support
Firefox – No support
Firefox
footnote No support
Opera – Full support
Opera 15 (Release date: 2013-07-02)
footnote Full support
Safari – No support
Safari
footnote No support
Firefox for Android – No support
Firefox for Android
footnote No support
Safari on iOS – No support
Safari on iOS
footnote No support
Event.getRules
Chrome – Full support
Chrome 21 (Release date: 2012-07-31)
footnote Full support
Edge – Full support
Edge 79 (Release date: 2020-01-15)
footnote Full support
Firefox – No support
Firefox
footnote No support
Opera – Full support
Opera 15 (Release date: 2013-07-02)
footnote Full support
Safari – No support
Safari
footnote No support
Firefox for Android – No support
Firefox for Android
footnote No support
Safari on iOS – No support
Safari on iOS
footnote No support
Event.hasListener
Chrome – Full support
Chrome 21 (Release date: 2012-07-31)
footnote Full support
Edge – Full support
Edge 14 (Release date: 2016-08-02)
footnote Full support
Firefox – Full support
Firefox 59 (Release date: 2018-03-13)
footnote Full support
Opera – Full support
Opera 15 (Release date: 2013-07-02)
footnote Full support
Safari – Full support
Safari 14 (Release date: 2020-09-16)
footnote Full support
Firefox for Android – Full support
Firefox for Android 59 (Release date: 2018-03-13)
footnote Full support
Safari on iOS – Full support
Safari on iOS 15 (Release date: 2021-09-20)
footnote Full support
Event.hasListeners
Chrome – Full support
Chrome 21 (Release date: 2012-07-31)
footnote Full support
Edge – Full support
Edge 79 (Release date: 2020-01-15)
footnote Full support
Firefox – No support
Firefox
footnote No support
Opera – Full support
Opera 15 (Release date: 2013-07-02)
footnote Full support
Safari – No support
Safari
footnote No support
Firefox for Android – No support
Firefox for Android
footnote No support
Safari on iOS – No support
Safari on iOS
footnote No support
Event.removeListener
Chrome – Full support
Chrome 21 (Release date: 2012-07-31)
footnote Full support
Edge – Full support
Edge 14 (Release date: 2016-08-02)
footnote Full support
Firefox – Full support
Firefox 59 (Release date: 2018-03-13)
footnote Full support
Opera – Full support
Opera 15 (Release date: 2013-07-02)
footnote Full support
Safari – Full support
Safari 14 (Release date: 2020-09-16)
footnote Full support
Firefox for Android – Full support
Firefox for Android 59 (Release date: 2018-03-13)
footnote Full support
Safari on iOS – Full support
Safari on iOS 15 (Release date: 2021-09-20)
footnote Full support
Event.removeRules
Chrome – Full support
Chrome 21 (Release date: 2012-07-31)
footnote Full support
Edge – Full support
Edge 79 (Release date: 2020-01-15)
footnote Full support
Firefox – No support
Firefox
footnote No support
Opera – Full support
Opera 15 (Release date: 2013-07-02)
footnote Full support
Safari – No support
Safari
footnote No support
Firefox for Android – No support
Firefox for Android
footnote No support
Safari on iOS – No support
Safari on iOS
footnote No support
Rule
Chrome – Full support
Chrome 21 (Release date: 2012-07-31)
footnote Full support
Edge – Full support
Edge 79 (Release date: 2020-01-15)
footnote Full support
Firefox – No support
Firefox
footnote No support
Opera – Full support
Opera 15 (Release date: 2013-07-02)
footnote Full support
Safari – No support
Safari
footnote No support
Firefox for Android – No support
Firefox for Android
footnote No support
Safari on iOS – No support
Safari on iOS
footnote No support
UrlFilter
Chrome – Full support
Chrome 21 (Release date: 2012-07-31)
footnote Full support
Edge – Full support
Edge 79 (Release date: 2020-01-15)
footnote Full support
Firefox – Full support
Firefox 50 (Release date: 2016-11-15)
footnote Full support
Opera – Full support
Opera 15 (Release date: 2013-07-02)
footnote Full support
Safari – Full support
Safari 14 (Release date: 2020-09-16)
footnote Full support
Firefox for Android – Full support
Firefox for Android 50 (Release date: 2016-11-15)
footnote Full support
Safari on iOS – Full support
Safari on iOS 15 (Release date: 2021-09-20)
footnote Full support

Tip: you can click/tap on a cell for more information.

Full support
No support

Note: This API is based on Chromium's chrome.events API. This documentation is derived from events.json in the Chromium code.

This page was last modified on by MDN contributors.

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