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

The FocusEvent() constructor returns a newly created FocusEvent object with an optional EventTarget. When a change a focus has a source and a destination, the relatedTarget value must be set to the other target.


var focusEvent = new FocusEvent(typeArg, focusEventInit); 


The FocusEvent() constructor also inherits arguments from UIEvent() and from Event().

Is a DOMString representing the name of the event.
Is a FocusEventInit dictionary, having the following fields:
  • "relatedTarget", optional and defaulting to null, is an EventTarget representing the secondary target of a FocusEvent.

The FocusEventInit dictionary also accepts fields from the UIEventInit and EventInit dictionaries.


Specification Status Comment
Document Object Model (DOM) Level 3 Events Specification
The definition of 'FocusEvent()' in that specification.
Obsolete Initial definition

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support Yes Yes24 No Yes Yes
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support Yes Yes Yes24 Yes Yes ?

See also

Document Tags and Contributors

Contributors to this page: fscholz, teoli, kscarfone
Last updated by: fscholz,