get name of Transitionend event for current browser, src: https://stackoverflow.com/q/12250329/2823589

getTransitionEndEventName.js

var whichTransitionEvent = (function (){
	var t;
	var el = document.createElement('fakeelement');
	var transitions = {
	  'transition'       :'transitionEnd',
	  'OTransition'      :'oTransitionEnd',
	  'MSTransition'     :'msTransitionEnd',
	  'MozTransition'    :'transitionend',
	  'WebkitTransition' :'webkitTransitionEnd'
	}

	for(t in transitions){
		 if( el.style[t] !== undefined ){
			  return transitions[t];
		 }
	}
} ());

console.log(whichTransitionEvent);        // returns "webkitTransitionEvent" in Chrome
console.log(typeof whichTransitionEvent); // returns "string"

https://stackoverflow.com/q/12250329/2823589