Web/API/Window/event

The read-only Window property event returns the Event which is currently being handled by the site's code. Outside the context of an event handler, the value is always undefined.

You should avoid using this property in new code, and should instead use the Event passed into the event handler function. This property is not universally supported and even when supported introduces potential fragility to your code.

Note: This property can be fragile, in that there may be situations in which the returned Event is not the expected value. In addition, Window.event is not accurate for events dispatched within shadow trees.

Specifications

Specification	Status	Comment
DOMThe definition of 'Window.event' in that specification.	Living Standard	Initial definition.

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
event	Chrome Full support 1	Edge Full support 12	Firefox Full support 66 Full support 66 Full support 63 Notes' Disabled' Notes' This was briefly enabled by default in 65, then removed again while related compatibility issues are sorted out (see bug 1520756). Disabled' From version 63: this feature is behind the dom.window.event.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.	IE Full support 4	Opera Full support 7	Safari Full support 1.1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 66 Full support 66 Full support 63 Notes' Disabled' Notes' This was briefly enabled by default in 65, then removed again while related compatibility issues are sorted out (see bug 1520756). Disabled' From version 63: this feature is behind the dom.window.event.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.	Opera Android Full support 10.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0

Legend

Full support  

Full support

See implementation notes.'

See implementation notes.

User must explicitly enable this feature.'

User must explicitly enable this feature.

See also

• Event.srcElement

Window.event by Mozilla Contributors is licensed under CC-BY-SA 2.5.