javascript - How check if custom event was prevented -

in code need interact custom event after dispatched

// ... let customevent = new customevent('myevent', {   bubbles: true,   cancelable: true });  button.addeventlistener('click', function (e) {   e.preventdefault();   otherelement.dispatchevent( customevent );   // @ point neeed   // if ( customevent canceled or prevented ) { } }); 

how can check if has been prevented/canceled or solution "feedback" event?

lots of ways this. 1 way:

var iscanceled = !otherelement.dispatchevent(event);