custom-app/dhcc-app-dll/node_modules/dom-closest/index.js

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/**
 * Module dependencies
 */

var matches = require('dom-matches');

/**
 * @param element {Element}
 * @param selector {String}
 * @param context {Element}
 * @return {Element}
 */
module.exports = function (element, selector, context) {
  context = context || document;
  // guard against orphans
  element = { parentNode: element };

  while ((element = element.parentNode) && element !== context) {
    if (matches(element, selector)) {
      return element;
    }
  }
};