Question

If e.preventDefault() is called, can see reflected in e.defaultPrevented method.

Is there a similar property for e.stopPropagation()? If not, how to determine?

Answer 1

I haven’t looked through jQuery to see their method, but it seems you could override the stopPropagation method on the base Event object, set a flag, and then call the overridden method.

Something like:

var overriddenStop =  Event.prototype.stopPropagation;
Event.prototype.stopPropagation = function(){
    this.isPropagationStopped = true;
    overriddenStop.apply(this, arguments);
}