vue el-table 动态添加行与删除行的实现

<template>
  <el-dialog
    width="50%"
    :visible.sync="isShow"
    :before-close="beforeClose"
    title="自定义设备类型属性">
    <div class="dialogDiv">
      <el-table 
        :data="tableData.filter(data => handleAdd || data.name.toLowerCase().includes(handleAdd.toLowerCase()))" 
        style="width: 100%" border>
        <el-table-column prop="code" 
          :label="$t('basicData.device.propDlg.code')">
        </el-table-column>
        <el-table-column prop="maxValue" 
          :label="$t('basicData.device.propDlg.maxValue')">
        </el-table-column>
        <el-table-column prop="minValue" 
          :label="$t('basicData.device.propDlg.minValue')">
        </el-table-column>
        <el-table-column prop="name" 
          :label="$t('basicData.device.propDlg.name')">
        </el-table-column>
        <el-table-column prop="valueType" 
          :label="$t('basicData.device.propDlg.valueType')">
        </el-table-column>
        <el-table-column prop="warning" 
          :label="$t('basicData.device.propDlg.warning')">
        </el-table-column>
        <el-table-column align="center" width="160px">
          <template slot="header" slot-scope="scope">
            <el-button v-model="handleAdd" 
              size="mini"
              type="success"
              circle plain
              icon="el-icon-plus"
              @click="handleAdd(scope.$index, scope.row)">      
              {{ $t('common.add') }}      
            </el-button>
          </template>
          <template slot-scope="scope">
            <el-button
              size="mini"
              type="primary"
              circle plain
              icon="el-icon-edit"
              @click="handleEdit(scope.$index, scope.row)">
              {{ $t('common.edit') }}
            </el-button>
            <el-button
              size="mini"
              type="danger"
              circle plain
              icon="el-icon-delete"
              @click="handleDelete(scope.$index, scope.row)">
              {{ $t('common.delete') }}
            </el-button>
          </template>
        </el-table-column>
      </el-table>
    </div>
    <span slot="footer">
      <el-button @click="cancel">{{ $t('common.cancel') }}</el-button>
      <el-button @click="confirm" type="primary">{{ $t('common.confirm') }}</el-button>
    </span>
  </el-dialog>
</template>

<script>
export default {
  data() {
    return {
      tableData: []
    }
  },
  methods: {
    // 添加行
    handleAdd() {
      let row = {
        code: "",
        maxValue: "",
        minValue: "",
        name: "",
        valueType: "",
        warning: ""
      }
      this.tableData.push(row) 
    },
    // 编辑
    handleEdit(index, row) {   
    },
    // 删除行
    handleDelete(index, row) {
      this.tableData.splice(index, 1)
    },
    cancel() {
      this.$emit("cancel")
    },
    confirm() {
      this.$emit("confirm", this.tableData)
    }
  }
};
</script>

<style lang="scss" scoped>
.dialogDiv {
  height: 300px;
  overflow: auto;
}
</style>

summary-method=“getSummaries” show-summary

<div class="contentInfoWrap">
            <el-table :data="tableData" class="customTable" :summary-method="getSummaries" show-summary border :header-cell-style="HeadTable" :cell-style="columnStyle"
              :row-class-name="tableRowClassName" style="width: 100%">
              <el-table-column width="150" fixed>
                <template slot="header">
                  <div></div>
                </template>
                <template slot-scope="scope">
                  <div class="filstColumn">
                    <span>{{ scope.row.name }}</span>
                  </div>
                </template>
              </el-table-column>
              <el-table-column align="center" width="120" prop="name" label="活动月"></el-table-column>
              <el-table-column align="center" width="120" prop="channel" label="渠道"></el-table-column>
              <el-table-column align="center" width="120" prop="number" label="CPT VOL(箱)"></el-table-column>
            </el-table>
          </div>

// 合计行样式
.el-table__footer-wrapper tbody td,
.el-table__header-wrapper tbody td {
  background-color: #e3f3ff !important;
  color: #666;
}
.el-table__footer-wrapper .is-leaf {
  color: #666 !important;
}
.el-table__fixed-footer-wrapper tbody td {
  border-top: 1px solid #ebeef5;
  background-color: #e3f3ff;
  color: #666;
  text-align: center !important;
}
.has-gutter tr td .cell {
  text-align: center;
  color: #001111;
}
//合并行放在第一行
.contentInfoWrap .el-table {
  display: flex;
  flex-direction: column;
}
.contentInfoWrap .el-table__body-wrapper {
  order: 1;
}
.contentInfoWrap .el-table__fixed-body-wrapper {
  top: 97px !important;
}
.contentInfoWrap .el-table__fixed-footer-wrapper {
  z-index: 0;
  top: 50px;
}

showSummariesPosition() {
      const table = document.querySelector('.customTable') // customTable这个是在el-table定义的类名
      const footer = document.querySelector(
        '.customTable .el-table__footer-wrapper'
      )
      const body = document.querySelector(
        '.customTable .el-table__body-wrapper'
      )
      table.removeChild(footer) // 移除表格最下方的合计行
      table.insertBefore(footer, body) // 把合计行插入到表格body的上面
    },

getSummaries(param) {
      const { columns, data } = param
      const sums = []
      columns.forEach((column, index) => {
        if (index === 0) {
          sums[index] = 'Total(销量)'
          return
        }
        const values = data.map((item) => Number(item[column.property]))
        if (!values.every((value) => isNaN(value))) {
          sums[index] = values.reduce((prev, curr) => {
            const value = Number(curr)
            if (!isNaN(value)) {
              return prev + curr
            } else {
              return prev
            }
          }, 0)
          sums[index] += ' '
        } else {
          sums[index] = ' '
        }
      })
      return sums
    },