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    This is an experimental technology
    Because this technology's specification has not stabilized, check the compatibility table for the proper prefixes to use in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the spec changes.

    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.
    Working Draft Initial definition

    Browser compatibility

    Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
    Basic support (Yes) 24.0 (24.0) Not supported (Yes) (Yes)
    Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
    Basic support (Yes) 24.0 (24.0) Not supported (Yes) (Yes)

    See also


    Document Tags and Contributors

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