code: function() {
  
          if (this.destroyed) {
              return this;
          }
  
  
          if (this.open) {
              this.close();
          }
  
  
          if (Popup.current === this) {
              Popup.current = null;
          }
  
  
          this.options.removeElement(this.node);
  
  
          for (var i in this) {
              delete this[i];
          }
  
          return this;
      }
docs: 销毁浮层