Test if the browser support the transitionend event

gistfile1.js

var transitionend;

// Test for transitionend event
(function() {
	if (!window.addEventListener) {
		return;
	}

	var div = document.createElement("div");
	function handler(e) {
		transitionend = e.type;
		abort();
	}

	function abort() {
		if (div) {
			div.parentNode.removeChild(div);
			div = null;
		}
	}

	div.setAttribute("style", "-webkit-transition: opacity 1ms; -moz-transition: opacity 1ms; -o-transition: opacity 1ms; transition: opacity 1ms");
	div.addEventListener("WebkitTransitionEnd", handler, false);
	div.addEventListener("MozTransitionEnd",    handler, false);
	div.addEventListener("oTransitionEnd",      handler, false);
	div.addEventListener("transitionend",       handler, false);
	document.body.appendChild(div);

	window.setTimeout(function() {
		div.style.opacity = 0;
		window.setTimeout(abort, 100);
	}, 0);
}());