Function getClosest. Get the parent element with a specific selector

_tools-getClosest.js

/**
 * @function getClosest
 * @description Get the parent element with a specific selector
 * @param {Element} sonElement - Son node
 * @param {String} parentSelector - Parent selector
 * @returns {Element|null}
 */
function getClosest(sonElement, parentSelector) {

	// Element.matches() polyfill
	if (!Element.prototype.matches) {
		Element.prototype.matches =
			Element.prototype.matchesSelector ||
			Element.prototype.mozMatchesSelector ||
			Element.prototype.msMatchesSelector ||
			Element.prototype.oMatchesSelector ||
			Element.prototype.webkitMatchesSelector ||
			function (s) {
				var matches = (this.document || this.ownerDocument).querySelectorAll(s),
					i = matches.length;
				while (--i >= 0 && matches.item(i) !== this) { }
				return i > -1;
			};
	}

	// Get the closest matching element
	for (; sonElement && sonElement !== document; sonElement = sonElement.parentNode) {
		if (sonElement.matches(parentSelector)) return sonElement;
	}
	return null;
};