项目需求：前端做排序，后台返回的数据有合计一项，排序时，合计始终在最后一行



使用

@sort-change='sortChange'

   <el-table-column
      prop="revPar"
      align='center'
      sortable="custom"  
      label="RevPAR"
      width="110">
    </el-table-column>

sortChange(column){
      let arr = []
      this.tableData.forEach(val=>{
        arr.push(val)
      })
      if(column.order=='descending'){
        this.tableDatalist = arr.sort((a, b) => {
          let aVal =0
          if(String(a[fieldName]).indexOf('%')!=-1){
            aVal = Number(a[fieldName].split('%')[0])
          }else{
           aVal = Number(a[fieldName])
          }
          let bVal =0
          if(b[fieldName].indexOf('%')!=-1){
            bVal = Number(b[fieldName].split('%')[0])
          }else{
           bVal = Number(b[fieldName])
          }
          if (a.name == '合计') {
            aVal = -9999
          }
          if (b.name == '合计') {
            bVal = -9999
          }
          return bVal - aVal
        })
      }else if(column.order=='ascending'){
        this.tableDatalist = arr.sort((a, b) => {
          let aVal =0
          if(a[fieldName].indexOf('%')!=-1){
            aVal = Number(a[fieldName].split('%')[0])   //因为数据中有%,没有的话可以去掉
          }else{
           aVal = Number(a[fieldName])
          }
          let bVal =0
          if(b[fieldName].indexOf('%')!=-1){
            bVal = Number(b[fieldName].split('%')[0])
          }else{
           bVal = Number(b[fieldName])
          }
          if (a.name == '合计') {
            aVal = 9999
          }
          if (b.name == '合计') {
            bVal = 9999
          }
          return aVal - bVal
        })
      }else{
        this.tableDatalist = this.tableData
      }
    },

具体操作根据业务需求自行修改