modified polyfill for matchesSelector https://gist.github.com/jonathantneal/3062955 https://github.com/hakubo/onTap/blob/master/ontap.js#L4-24

Element.matches.js

// jonathantneal's polyfill for matchesSelector
if (this.Element) function(ElementPrototype) {
    ElementPrototype.matches = ElementPrototype.matchesSelector =
    ElementPrototype.matchesSelector || 
    ElementPrototype.webkitMatchesSelector ||
    ElementPrototype.mozMatchesSelector ||
    ElementPrototype.msMatchesSelector ||
    ElementPrototype.oMatchesSelector ||
    function (selector) {
        var nodes = (this.parentNode || this.document).querySelectorAll(selector), i = -1;

    	while (nodes[++i] && nodes[i] !== this);

    	return !!nodes[i];
    };
}(Element.prototype);