source: trip-planner-front/node_modules/@angular/cdk/esm2015/a11y/focus-trap/polyfill.js@ e29cc2e

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
/** IE 11 compatible closest implementation that is able to start from non-Element Nodes. */
export function closest(element, selector) {
    if (!(element instanceof Node)) {
        return null;
    }
    let curr = element;
    while (curr != null && !(curr instanceof Element)) {
        curr = curr.parentNode;
    }
    return curr && (hasNativeClosest ?
        curr.closest(selector) : polyfillClosest(curr, selector));
}
/** Polyfill for browsers without Element.closest. */
function polyfillClosest(element, selector) {
    let curr = element;
    while (curr != null && !(curr instanceof Element && matches(curr, selector))) {
        curr = curr.parentNode;
    }
    return (curr || null);
}
const hasNativeClosest = typeof Element != 'undefined' && !!Element.prototype.closest;
/** IE 11 compatible matches implementation. */
function matches(element, selector) {
    return element.matches ?
        element.matches(selector) :
        element['msMatchesSelector'](selector);
}
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