el-table表格变更前后根据数据值改变背景颜色

需求：

1.左侧变更前表格数据不可以编辑，并且背景色加灰

2.右侧变更后表格数据可被编辑，编辑后变更前与变更后行数据不一致，添加背景色区分

3.点击删除的时候，给变更后表格当前行，添加背景色和删除的中横线

    <el-table
          ref="table"
          :data="tableDataList"
          style="width: 100%; margin: 0 auto; font-size: 14px;"
          height="100%"
          align="center"
          row-key="node_code"
          :row-class-name="tableRowClassName"
          :cell-class-name="tableCellClassName"
          @cell-click="handleCellClick"
        >
          <el-table-column align="center" label="操作" min-width="90" fixed="right">
            <template slot-scope="scope">
              <div>
                <a class="mc" title="删除" @click="handleDel(scope.row)"><em slot="reference" class="el-icon-delete mc" style="cursor: pointer" />a>
              div>
            template>
          el-table-column>
          <el-table-column label="变更前">
            <el-table-column v-for="(item, index) in viewColumns" :key="index" :fixed="item.fixed" :prop="item.prop" :align="item.align" :label="item.label" :min-width="item.width" :show-overflow-tooltip="true">
              <template slot-scope="scope">
                
                <div class="item__txt">{{ scope.row[item.prop] }}div>
              template>
            el-table-column>
          el-table-column>
          <el-table-column label="变更后" class="after_class">
            
            <el-table-column v-for="(item, index) in viewColumnsTwo" :key="index" :fixed="item.fixed" :prop="item.prop" :align="item.align" :label="item.label" :min-width="item.width" :show-overflow-tooltip="true" class="after_class">
              <template slot-scope="scope" class="after_class">
                <el-input v-if="scope.row.index == rowIndex && scope.column.index == columnIndex" v-model="scope.row[item.prop]" class="item__input" placeholder="请输入" @blur="handleBlur" />
                <div v-else class="item__txt after_class">{{ scope.row[item.prop] }}div>
              template>
            el-table-column>
          el-table-column>
        el-table>

数据值：

添加背景色处理:

 tableCellClassName({ row, column, columnIndex }) {
      // 把每一列的索引放到column里
      column.index = columnIndex
      if (row.colorFlag) {
        if ((column.property == 'topSymptomAfter' || column.property == 'controlItemAfter' || column.property == 'controlStandardAfter' || column.property == 'remarkAfter')) {
          return 'warning-row' // 返回被点击行的样式
        }
      }
      if (column.property == 'topSymptomBefore' || column.property == 'controlItemBefore' || column.property == 'controlStandardBefore' || column.property == 'remarkBefore') {
        return 'success-row' // 返回被点击行的样式
      }
      // 对比后的数据 不等于 对比前的数据,那么添加背景色
      if (column.property == 'topSymptomAfter' && (row.topSymptomAfter.toString() !== row.topSymptomBefore.toString())) {
        return 'fill-row'
      }
      if (column.property == 'controlItemAfter' && (row.controlItemAfter.toString() !== row.controlItemBefore.toString())) {
        return 'fill-row'
      }
      if (column.property == 'controlStandardAfter' && (row.controlStandardAfter.toString() !== row.controlStandardBefore.toString())) {
        return 'fill-row'
      }
      if (column.property == 'remarkAfter' && (row.remarkAfter.toString() !== row.remarkBefore.toString())) {
        return 'fill-row'
      }
      return '' // 返回其他行的默认样式
    },
 
//删除行
 handleDel(row) {
      this.handleIdentification(row)
      // this.tableDataList = this.tableDataList.filter(item => item.index !== row.index)
      if (!(row.topSymptomBefore && row.controlItemBefore && row.controlStandardBefore && row.remarkBefore)) {
        row.colorFlag = false
        // 如果左侧没有数据值，只有右侧有数据值，点击删除 是删除整条数据
        this.tableDataList = this.tableDataList.filter(item => item.index !== row.index)
      }
      if ((row.topSymptomAfter || row.controlItemAfter || row.controlStandardAfter || row.remarkAfter)) {
        row.colorFlag = true
        updateMqs(this.addForm).then(res => {
          this.$message.success(res.msg)
        }).catch(res => {
          this.$message.error(res.msg)
        })
      }
    },

成果：