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-tableref="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"><!-- <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 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"><!-- 变更前的数据是不可修改的,变更后的数据是可以被修改的 --><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：

<script>
data() {return {
tableDataList:[],
//isEdit单元格控制是否可编辑viewColumns: [{ prop: 'topSymptomBefore', width: '120', align: 'center', label: '事项', fixed: false, isEdit: false },{ prop: 'controlItemBefore', width: '120', align: 'center', label: '管理项', fixed: false, isEdit: false },{ prop: 'controlStandardBefore', width: '120', align: 'center', label: '管理基准', fixed: false, isEdit: false },{ prop: 'remarkBefore', width: '120', align: 'center', label: '备注', fixed: false, isEdit: false}],// idAfter是当前数据的id,新增的时候 这个数据是viewColumnsTwo: [{ prop: 'topSymptomAfter', width: '120', align: 'center', label: '事项', fixed: false, isEdit: true },{ prop: 'controlItemAfter', width: '120', align: 'center', label: '管理项', fixed: false, isEdit: true },{ prop: 'controlStandardAfter', width: '120', align: 'center', label: '管理基准', fixed: false, isEdit: true },{ prop: 'remarkAfter', width: '120', align: 'center', label: '备注', fixed: false, isEdit: true }], }
}</script>

添加背景色处理:

 tableCellClassName({ row, column, columnIndex }) {// 把每一列的索引放到column里column.index = columnIndexif (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 = trueupdateMqs(this.addForm).then(res => {this.$message.success(res.msg)}).catch(res => {this.$message.error(res.msg)})}},

<style lang="scss" scoped>
::v-deep .el-table .warning-row{text-decoration: line-through;background-color: #f0f9eb;color: red
}
::v-deep .el-table  .success-row {background-color: #F0F0F0;}
::v-deep .el-table .fill-row{background-color: #F5F108;
}</style>

成果：