How do I detect a transition end without a JavaScript library?

Question

I\'d like to delete an object after it\'s done animating with a CSS transition, but I\'m not able to use a JavaScript library.

How do I detect when the animation is

Answer 1

I was unable to find a suitable 'transitionend' polyfill that met my requirements. So if you want something for hooking the transition end once, use this:

(function() {
    var i,
        el = document.createElement('div'),
        transitions = {
            'transition':'transitionend',
            'OTransition':'otransitionend',  // oTransitionEnd in very old Opera
            'MozTransition':'transitionend',
            'WebkitTransition':'webkitTransitionEnd'
        };

    var transitionEnd = '';
    for (i in transitions) {
        if (transitions.hasOwnProperty(i) && el.style[i] !== undefined) {
            transitionEnd = transitions[i];
            break;
        }
    }

    Object.prototype.onTransitionEndOnce = function(callback) {
        if (transitionEnd === '') {
            callback();
            return this;
        }
        var transitionEndWrap = function(e) {
            callback(); 
            e.target.removeEventListener(e.type, transitionEndWrap);
        };
        this.addEventListener(transitionEnd, transitionEndWrap);
        return this;
    };
}());