2.3.4.7 onbeforeeditfocus
Quirks Mode, IE7 Mode, IE8 Mode, IE9 Mode, IE10 Mode, and IE11 Mode (All Versions)
onbeforeeditfocus of type Function
Occurs before an object contained in an editable element enters a UI-activated state or when an editable container object is control selected.
To invoke, press the Enter key, click an object when it has focus, or double-click an object.
Bubbles: Yes
Cancelable: Yes
Context Info: fromElement, srcElement
This attribute is an extension to HTMLElement.