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closest.js
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33 lines (29 loc) · 864 Bytes
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var DOCUMENT_NODE_TYPE = 9;
/**
* A polyfill for Element.matches()
*/
if (typeof Element !== 'undefined' && !Element.prototype.matches) {
var proto = Element.prototype;
proto.matches = proto.matchesSelector ||
proto.mozMatchesSelector ||
proto.msMatchesSelector ||
proto.oMatchesSelector ||
proto.webkitMatchesSelector;
}
/**
* Finds the closest parent that matches a selector.
*
* @param {Element} element
* @param {String} selector
* @return {Function}
*/
function closest (element, selector) {
while (element && element.nodeType !== DOCUMENT_NODE_TYPE) {
if (typeof element.matches === 'function' &&
element.matches(selector)) {
return element;
}
element = element.parentNode;
}
}
module.exports = closest;