ionic-framework/js/utils/dom.js

(function(ionic) {
  ionic.DomUtil = {
    getChildIndex: function(element) {
      return Array.prototype.slice.call(element.parentNode.children).indexOf(element);
    },
    swapNodes: function(src, dest) {
      dest.parentNode.insertBefore(src, dest);
    },
    /**
     * {returns} the closest parent matching the className
     */
    getParentWithClass: function(e, className) {
      while(e.parentNode) {
        if(e.parentNode.classList && e.parentNode.classList.contains(className)) {
          return e.parentNode;
        }
        e = e.parentNode;
      }
      return null;
    },
    /**
     * {returns} the closest parent or self matching the className
     */
    getParentOrSelfWithClass: function(e, className) {
      while(e) {
        if(e.classList && e.classList.contains(className)) {
          return e;
        }
        e = e.parentNode;
      }
      return null;
    }
  };
})(window.ionic);