| /** |
| * @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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