code: function( e ){
  
          e.preventDefault();
  
          document.removeEventListener( 'mouseup', this, false );
          if(this.isDrag) document.removeEventListener( 'mousemove', this, false );
  
          if(this.current !== undefined){ 
  
              if( this.current === parseFloat(e.target.name) ){ 
                  e.target.contentEditable = true;
                  e.target.focus();
              }
  
          }
  
      }
docs: //