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