Function isElement

test/angular/1.4/angular.js:792–796

* @ngdoc function * @name angular.isElement * @module ng * @kind function * * @description * Determines if a reference is a DOM element (or wrapped jQuery element). * * @param {*} value Reference to check. * @returns {boolean} True if `value` is a DOM element (or wrapped jQuery element).

(node)

 * @returns {boolean} True if `value` is a DOM element (or wrapped jQuery element).
 */
function isElement(node) {
  return !!(node &&
    (node.nodeName  // we are a direct element
    || (node.prop && node.attr && node.find)));  // we have an on and find method part of jQuery API
}

/**
 * @param str 'key1,key2,...'