// element-closest | CC0-1.0 | github.com/jonathantneal/closest
(function (ElementProto) {
if (typeof ElementProto.matches !== 'function') {
ElementProto.matches = ElementProto.msMatchesSelector || ElementProto.mozMatchesSelector || ElementProto.webkitMatchesSelector || function matches(selector) {
var element = this;
var elements = (element.document || element.ownerDocument).querySelectorAll(selector);
var index = 0;
while (elements[index] && elements[index] !== element) {
++index;
}
return Boolean(elements[index]);
};
}
if (typeof ElementProto.closest !== 'function') {
ElementProto.closest = function closest(selector) {
var element = this;
while (element && element.nodeType === 1) {
if (element.matches(selector)) {
return element;
}
element = element.parentNode;
}
return null;
};
}
})(window.Element.prototype);
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