WindowEventHandlers

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Properties
Methods
Specifications
Browser compatibility
See also

The WindowEventHandlers mixin describes the event handlers common to several interfaces like Window, or HTMLBodyElement and HTMLFrameSetElement. Each of these interfaces can implement additional specific event handlers.

Note: WindowEventHandlers is a mixin and not an interface; you can't actually create an object of type WindowEventHandlers.

Properties

The events properties, of the form onXYZ, are defined on the WindowEventHandlers, and implemented by Window, and WorkerGlobalScope for Web Workers.

WindowEventHandlers.onafterprint: Is an EventHandler representing the code to be called when the afterprint event is raised.
WindowEventHandlers.onbeforeprint: Is an EventHandler representing the code to be called when the beforeprint event is raised.
WindowEventHandlers.onbeforeunload: Is an EventHandler representing the code to be called when the beforeunload event is raised.
WindowEventHandlers.onhashchange: Is an EventHandler representing the code to be called when the hashchange event is raised.
WindowEventHandlers.onlanguagechange: Is an EventHandler representing the code to be called when the languagechange event is raised.
WindowEventHandlers.onmessage: Is an EventHandler representing the code to be called when the message event is raised.
WindowEventHandlers.onmessageerror: Is an EventHandler representing the code to be called when the MessageError event is raised.
WindowEventHandlers.onoffline: Is an EventHandler representing the code to be called when the offline event is raised.
WindowEventHandlers.ononline: Is an EventHandler representing the code to be called when the online event is raised.
WindowEventHandlers.onpagehide: Is an EventHandler representing the code to be called when the pagehide event is raised.
WindowEventHandlers.onpageshow: Is an EventHandler representing the code to be called when the pageshow event is raised.
WindowEventHandlers.onpopstate: Is an EventHandler representing the code to be called when the popstate event is raised.
WindowEventHandlers.onstorage: Is an EventHandler representing the code to be called when the storage event is raised.
WindowEventHandlers.onunhandledrejection: An event handler for unhandled Promise rejection events.
WindowEventHandlers.onunload: Is an EventHandler representing the code to be called when the unload event is raised.

Methods

This interface defines no method.

Specifications

Specification	Status	Comment
HTML Living Standard The definition of 'WindowEventHandlers' in that specification.	Living Standard	No change since the latest snapshot, HTML 5.1.
HTML 5.1 The definition of 'WindowEventHandlers' in that specification.	Recommendation	Snapshot of HTML Living Standard. Added `onlanguage` since the HTML5 snapshot.
HTML5 The definition of 'WindowEventHandlers' in that specification.	Recommendation	Snapshot of HTML Living Standard. Creation of `WindowEventHandlers` (properties where on the target before it).

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`WindowEventHandlers`	Chrome Full support Yes	Edge ?	Firefox Full support Yes	IE ?	Opera Full support Yes	Safari ?	WebView Android Full support Yes	Chrome Android Full support Yes	Edge Mobile ?	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS ?	Samsung Internet Android ?
`onafterprint`	Chrome Full support 63	Edge Full support Yes	Firefox Full support 6	IE Full support Yes	Opera Full support 50	Safari No support No	WebView Android Full support 63	Chrome Android Full support 63	Edge Mobile Full support Yes	Firefox Android ?	Opera Android Full support 46	Safari iOS ?	Samsung Internet Android ?
`onbeforeprint`	Chrome Full support 63	Edge Full support Yes	Firefox Full support 6	IE Full support Yes	Opera Full support 50	Safari No support No	WebView Android Full support 63	Chrome Android Full support 63	Edge Mobile Full support Yes	Firefox Android ?	Opera Android Full support 46	Safari iOS ?	Samsung Internet Android ?
`onbeforeunload`	Chrome Full support 1	Edge Full support Yes	Firefox Full support 1	IE Full support 4	Opera Full support 12	Safari Full support 3	WebView Android Full support Yes	Chrome Android Full support Yes	Edge Mobile Full support Yes	Firefox Android ?	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android ?
`onhashchange`	Chrome Full support 5	Edge Full support Yes	Firefox Full support 3.6	IE Full support 8	Opera Full support 10	Safari Full support 5	WebView Android Full support Yes	Chrome Android Full support Yes	Edge Mobile Full support Yes	Firefox Android Full support 4	Opera Android Full support 10.1	Safari iOS Full support 5	Samsung Internet Android ?
`onlanguagechange` Experimental	Chrome Full support 37	Edge ?	Firefox Full support 32	IE No support No	Opera Full support 24	Safari ?	WebView Android Full support 37	Chrome Android Full support 37	Edge Mobile ?	Firefox Android Full support 4	Opera Android Full support 24	Safari iOS ?	Samsung Internet Android ?
`onmessage`	Chrome Full support 60	Edge ?	Firefox ?	IE ?	Opera Full support 47	Safari ?	WebView Android Full support 60	Chrome Android Full support 60	Edge Mobile ?	Firefox Android ?	Opera Android Full support 44	Safari iOS ?	Samsung Internet Android ?
`onmessageerror`	Chrome Full support 60	Edge ?	Firefox Full support 57	IE ?	Opera Full support 47	Safari ?	WebView Android Full support 60	Chrome Android Full support 60	Edge Mobile ?	Firefox Android Full support 57	Opera Android Full support 44	Safari iOS ?	Samsung Internet Android ?
`onpopstate`	Chrome Full support 5	Edge Full support 12	Firefox Full support 4	IE Full support 10	Opera Full support 11.5	Safari Full support 6	WebView Android ?	Chrome Android Full support 18	Edge Mobile ?	Firefox Android Full support 4	Opera Android Full support 11.5	Safari iOS Full support 5.1	Samsung Internet Android ?
`onrejectionhandled`	Chrome Full support 49	Edge ?	Firefox Partial support 55 Notes Disabled Partial support 55 Notes Disabled Notes Firefox doesn't yet send the unhandledrejection or understand rejectionhandled events. Completing the implementation will be addressed in bug 1362272. Disabled From version 55: this feature is behind the `dom.promise_rejection_events.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE No support No	Opera Full support 36	Safari Full support 11	WebView Android Full support 49	Chrome Android Full support 49	Edge Mobile ?	Firefox Android Partial support 55 Notes Disabled Partial support 55 Notes Disabled Notes Firefox doesn't yet send the unhandledrejection or understand rejectionhandled events. Completing the implementation will be addressed in bug 1362272. Disabled From version 55: this feature is behind the `dom.promise_rejection_events.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	Opera Android No support No	Safari iOS Full support 11.3	Samsung Internet Android ?
`onstorage`	Chrome ?	Edge Full support Yes	Firefox Full support 45	IE ?	Opera ?	Safari ?	WebView Android No support No	Chrome Android No support No	Edge Mobile Full support Yes	Firefox Android Full support 45	Opera Android ?	Safari iOS ?	Samsung Internet Android ?
`onunhandledrejection`	Chrome Full support 49	Edge ?	Firefox Partial support 55 Notes Disabled Partial support 55 Notes Disabled Notes Firefox doesn't yet send the unhandledrejection or understand rejectionhandled events. Completing the implementation will be addressed in bug 1362272. Disabled From version 55: this feature is behind the `dom.promise_rejection_events.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE No support No	Opera Full support 36	Safari Full support 11	WebView Android Full support 49	Chrome Android Full support 49	Edge Mobile ?	Firefox Android Partial support 55 Notes Disabled Partial support 55 Notes Disabled Notes Firefox doesn't yet send the unhandledrejection or understand rejectionhandled events. Completing the implementation will be addressed in bug 1362272. Disabled From version 55: this feature is behind the `dom.promise_rejection_events.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	Opera Android No support No	Safari iOS Full support 11.3	Samsung Internet Android ?
`onunload`	Chrome Full support Yes	Edge Full support Yes	Firefox Full support Yes	IE Full support Yes	Opera Full support Yes	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Edge Mobile Full support Yes	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android ?

Legend

Full support: Full support
Partial support: Partial support
No support: No support
Compatibility unknown: Compatibility unknown
Experimental. Expect behavior to change in the future.: Experimental. Expect behavior to change in the future.
See implementation notes.: See implementation notes.
User must explicitly enable this feature.: User must explicitly enable this feature.

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Contributors to this page: chrisdavidmills, mdnwebdocs-bot, mfluehr, sideshowbarker, fscholz, jpmedley, teoli, Ehsan

Last updated by: chrisdavidmills, Apr 26, 2019, 4:31:30 AM