code: function() {
  
          if (this.destroyed) {
              return this;
          }
  
          this.__dispatchEvent('beforeremove');
  
          if (Popup.current === this) {
              Popup.current = null;
          }
  
  
          // 从 DOM 中移除节点
          this.__popup.remove();
          this.__backdrop.remove();
          this.__mask.remove();
  
  
          if (!_isIE6) {
              $(window).off('resize', this.reset);
          }
  
  
          this.__dispatchEvent('remove');
  
          for (var i in this) {
              delete this[i];
          }
  
          return this;
      }
docs: 销毁浮层