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Filename : closest.js

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import matches from './matches';
/**
 * Returns the closest parent element that matches a given selector.
 * 
 * @param node the reference element
 * @param selector the selector to match
 * @param stopAt stop traversing when this element is found
 */

export default function closest(node, selector, stopAt) {
  if (node.closest && !stopAt) node.closest(selector);
  var nextNode = node;

  do {
    if (matches(nextNode, selector)) return nextNode;
    nextNode = nextNode.parentElement;
  } while (nextNode && nextNode !== stopAt && nextNode.nodeType === document.ELEMENT_NODE);

  return null;
}