.onFocus()

Usage:

[[mdn>Web/API/HTMLElement|HTMLElement]] = Element.''onFocus''(callback)

Member of:

[[mdn>Web/API/HTMLElement|HTMLElement]]

Parameters:

callback – the function to call when the “focus” event occurs (required).

Returns:

The [[mdn>Web/API/HTMLElement|HTMLElement]] it was called on, thus allowing for command chaining.

Notes:

* This is just a shorthand function for the [[toolbox:event:on:index|.on]] method, specific for the “focus” event. See there for more information and examples. * The “focus” event handler can be attached to any [[mdn>Web/API/HTMLElement|HTMLElement]], but of course only makes sense for elements which are either naturally focusable (e.g. '''', '''', '''', '''', etc.), or are otherwise //made// focusable (e.g. by setting the ''tabindex'' property). * Focus behaviour can differ on different platforms. Make sure to extensively test any function that relies on focussing with as many browsers on many different operating systems. </dd></dl> ===== See also ===== * [[toolbox:event:on:index|.on]] * [[toolbox:event:onblur:index|.onBlur]] ===== More information ===== * [[mdn>Web/API/EventTarget/addEventListener|EventTarget: addEventListener() method]] on MDN.