anchor.diff:                  <td>
                       {{{ obj.level | fillSpace }}}
                       <a @click="toggole(obj)">
  -                        {{ obj.isExpanded }}
  -                        <i v-show="obj.isExpanded" class="fa fa-caret-right"></i>
  -                        <i v-show="!obj.isExpanded" class="fa fa-caret-down"></i>
  +                        <i v-show="!obj.isExpanded" class="fa fa-caret-right"></i>
  +                        <i v-show="obj.isExpanded" class="fa fa-caret-down"></i>
                       </a>
                       <span v-text="obj.name"></span>
                   </td>
  
positive.code:                 }
              },
              toggole : function (menu) {
                  debugger;
  
                  /**
                   * 递归切换菜单的展开和收缩状态
                   */
                  var isExpanded = menu.isExpanded;
                  menu.isExpanded = !isExpanded;
                  toggleChildMenuListRecursion(menu, !isExpanded);
  
  
                  function toggleChildMenuListRecursion(menu, isShow) {
                      var list = menu.childList;
                      if(list == null) {
                          return;
  
negative.code:                     for(var i = 0; i < childList.length; i++) {
                          var childMenu = childList[i];
                          childMenu.level = level;
                          Vue.set(childMenu, "isShow", level <= 3);// 是否显示，1,2,3级菜单默认显示
                          Vue.set(childMenu, "isExpanded", level <= 2);// 是否展开菜单，1,2,3级菜单默认展开
                          tempList.push(childMenu);
  
                          initData(childMenu, level + 1, childMenu);
  