code: function updateResizeLine( cell, uetable ) {
  
          var line = getResizeLineByUETable.call( this ),
              table = uetable.table,
              styles = {
                  top: domUtils.getXY( table ).y + 'px',
                  left: domUtils.getXY( cell).x + cell.offsetWidth - cellBorderWidth + 'px',
                  display: 'block',
                  height: table.offsetHeight + 'px'
              };
  
          utils.extend( line.style, styles );
  
      }
docs: 更新resize-line