text: var _menu = this.dataSource;
  var len = _menu.length;
  for (var i = 0; i < len; i++) {
      var item = _menu[i];
  
      if (item.children && item.children.length != 0) {
          var children = item.children;
          for (var j = 0; j < children.length; j++) {
              _menu[len + j] = children[j];
          }
          len = _menu.length;
      }
      this.menuId.push(item);
      console.log(this.menuId)
  }