/*******************************************************************************
 * Copyright 2019 Adobe
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

/**
 * Element.matches()
 * https://developer.mozilla.org/enUS/docs/Web/API/Element/matches#Polyfill
 */
if (!Element.prototype.matches) {
    Element.prototype.matches = Element.prototype.msMatchesSelector || Element.prototype.webkitMatchesSelector;
}

// eslint-disable-next-line valid-jsdoc
/**
 * Element.closest()
 * https://developer.mozilla.org/enUS/docs/Web/API/Element/closest#Polyfill
 */
if (!Element.prototype.closest) {
    Element.prototype.closest = function(s) {
        "use strict";
        var el = this;
        if (!document.documentElement.contains(el)) {
            return null;
        }
        do {
            if (el.matches(s)) {
                return el;
            }
            el = el.parentElement || el.parentNode;
        } while (el !== null && el.nodeType === 1);
        return null;
    };
}
