Checking Web Inspector protocol (specifically mouseEventNodeId) for the Accessibility Node Inspector.

Click handler on body delegate.
click
click
click
click
DOM1 inline click on parent div.
DOM1 inline click on parent div with role="button".
DOM1 inline click on parent div with tabindex="0".
DOM1 inline click on parent span.
click
mousedown
mouseup
DOM1 click on parent div.
DOM1 mousedown on parent div.
DOM1 mouseup on parent div
click
mousedown
mouseup
DOM2 click on parent div.
DOM2 mousedown on parent div.
DOM2 mouseup on parent div.