增加名称别名代码如下:
    activeSheet.AddDefinedName('aaaa', '$D$4:$H$8');
本控件只支持字母形式的名称别名。重复或其他形式的名称此函数返回false。
删除名称别名代码如下:
    activeSheet.DelDefinedName('aaaa');
删除名称别名代码如下:
  let sheetnames = activeSheet.getDefinedName();
删除前:

删除后:

打印日志:

完整的代码例子如下:
   let wsheet = new websheet('myofdID', yourElement);
 
 /**
   * 第一步 获取激活的sheet
   */
  let activeSheet = wsheet.ActiveSheet();
  let i = 1;
  activeSheet.SetCellValue(3, i, i++);
  activeSheet.SetCellValue(3, i, i++);
  activeSheet.SetCellValue(3, i, i++);
  activeSheet.SetCellValue(3, i, i++);
  activeSheet.SetCellValue(3, i, i++);
  activeSheet.SetCellValue(3, i, i++);
  activeSheet.SetCellValue(3, i, i++);
  activeSheet.SetCellValue(3, i, i++);
  activeSheet.SetCellValue(3, i, i++);
  activeSheet.SetCellValue(3, i, i++);
  let r = 1;
  activeSheet.SetCellValue(r, 3, r++);
  activeSheet.SetCellValue(r, 3, r++);
  activeSheet.SetCellValue(r, 3, r++);
  activeSheet.SetCellValue(r, 3, r++);
  activeSheet.SetCellValue(r, 3, r++);
  activeSheet.SetCellValue(r, 3, r++);
  activeSheet.SetCellValue(r, 3, r++);
  activeSheet.SetCellValue(r, 3, r++);
  activeSheet.SetCellValue(r, 3, r++);
  activeSheet.SetCellValue(r, 3, r++);
  activeSheet.SetCellValue(1, 1, '$D$4:$H$8');
  /**
    * 第二步 增加一个名称为aaaa的别名
    */
  activeSheet.AddDefinedName('aaaa', '$D$4:$H$8');
  /**
   * 打印出左右的别名
   */
  let sheetnames = activeSheet.getDefinedName();
  for (let rrr = 0; rrr < sheetnames.length; rrr++) {
    const onename = sheetnames[rrr];
    console.log('删除行前:'+onename.name + onename.refersTo);
  }
  let redFill = new websheet.Model.Fill();
  redFill.setColor('#FF0000')
  activeSheet.SetCellFill('D4', redFill);
  activeSheet.SetCellFill('H8', redFill);
  activeSheet.DelRowStart(3, 4);//删除第3行开始的4行
  /**
   * 再次打印出左右的别名
   */
  let sheetnames2 = activeSheet.getDefinedName();
  for (let rrr = 0; rrr < sheetnames2.length; rrr++) {
    const onename = sheetnames2[rrr];
    console.log('删除行后:'+onename.name + onename.refersTo);
  }
  /**
   * 删除别名
   */
  activeSheet.DelDefinedName('aaaa')
  /**
   * 删除后在打印
   */
  let sheetnamesd = activeSheet.getDefinedName();
  console.log('删除名称后名称长度:'+sheetnamesd.length);
  wsheet.BuildSheet();
  wsheet.Draw();