code: function (coordsArr) {
      if (this.disabled) {
        return;
      }
  
      var $td, tdOffset, containerOffset, top, left, height, width;
  
      var corners = this.instance.getCornerCoords(coordsArr);
  
      $td = $(this.instance.getCell(corners.BR.row, corners.BR.col));
      tdOffset = $td.offset();
      containerOffset = this.$container.offset();
  
      top = tdOffset.top - containerOffset.top + this.$container.scrollTop() - 1;
      left = tdOffset.left - containerOffset.left + this.$container.scrollLeft() - 1;
      height = $td.outerHeight();
      width = $td.outerWidth();
  
      this.handle.style.top = top + height - 3 + 'px';
      this.handle.style.left = left + width - 3 + 'px';
      this.handle.style.display = 'block';
    }
docs: Show handle in cell cornerł
  @param {Object[]} coordsArr