"If the instance of the activation trigger is not an event of event type click (that is, when it does not result from a user's activation of a button or link using a mouse or equivalent pointing device), the implementation MUST synthesize and dispatch an event of event type click as one of the default actions of that activation trigger. The value of the Event.target MUST be set to the event target (normally, the currently focused element), and the event MUST simulate a left click (i.e., the MouseEvent.button attribute value MUST be 0, and the MouseEvent.buttons attribute value MUST be 1). Other context information of such a simulated click event is implementation dependent, but for historical purposes, the interface for the click event MUST be the MouseEvent interface, regardless of the actual device used to activate the element. Preventing the default action of the activation trigger, such as with the Event.preventDefault(), MUST stop the initiation of the activation behavior."

This isn't clear as to what we're supposed to do with the original event. 

For example, if the user hits enter on a form control, should we also dispatch keyboard events for the enter key, or only a mouse click event?