<HTMLElement>.onFocus()

Attaches an event handler callback function to the “focus” event of an element.

Usage:

HTMLElement = Element.onFocus(callback)

Member of:

HTMLElement

Parameters:

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

Returns:

The HTMLElement it was called on, thus allowing for command chaining.

Notes:

• This is just a shorthand function for the .on method, specific for the “focus” event. See there for more information and examples.
• The “focus” event handler can be attached to any HTMLElement, but of course only makes sense for elements which are either naturally focusable (e.g. <a>, <input>, <button>, <textarea>, etc.), or are otherwise made focusable (e.g. by setting the tabindex property). Also note that focus may behavior may not be the same across different platforms.

See also

More information