vue Element-ui 表格多选 修改选中行背景色

转自：https://www.cnblogs.com/Amerys/p/14688342.html

整体思路方式：

1、给获取到的数据添加自定义的className

2、在点击行(row-click)和手动点击勾选框的事件(select-all)中获取到当前的row的className,直接修改className即可 点击查看事件说明

3、在行的 className 的回调方法中(row-class-name)直接返回className

注：还有另一种方式通过获取row进行循环，判断当前点击row的id或者index与数据的是否相等，然后存放点击后的row到新的数组中，这种方式因为触及到遍历。当我有500行数据或者很多行数据，可想而知这里要遍历多少次，还有另一个就是连续点行的颜色发生变化会有延迟，相对来说性能就不好了。

步骤如下：

1、给数据添加自定义className, 由于这里演示的是本地数据，是直接添加的className; 真实开发是通过接口去加载数据，获取到的数据 直接遍历 赋值就可以，后面就不用管遍历了

data() {return {tableData: [{date: "2016-05-03",name: "王小虎",address: "上海市普陀区金沙江路 1518 弄",className: "normal",},{date: "2016-05-02",name: "王小虎",address: "上海市普陀区金沙江路 1518 弄",className: "normal",},{date: "2016-05-04",name: "王小虎",address: "上海市普陀区金沙江路 1518 弄",className: "normal",},{date: "2016-05-01",name: "王小虎",address: "上海市普陀区金沙江路 1518 弄",className: "normal",},{date: "2016-05-08",name: "王小虎",address: "上海市普陀区金沙江路 1518 弄",className: "normal",},{date: "2016-05-06",name: "王小虎",address: "上海市普陀区金沙江路 1518 弄",className: "normal",},{date: "2016-05-07",name: "王小虎",address: "上海市普陀区金沙江路 1518 弄",className: "normal",},],};

2、点击行和点击勾选框的事件

methods: { // 手动点击勾选框触发的事件handleSelect(selection, row) {// selection,row  传递两个参数，row直接是对象// 只传一个参数得到的是数组if (row.className === "normal") {row.className = "tableSelectedRowBgColor";} else {row.className = "normal";}},// select-all 手动点击全选触发的事件handleSelectAll(selection) {if (selection.length > 0) {selection.forEach((item) => {if (item.className === "normal") {item.className = "tableSelectedRowBgColor";}});} else {// 空数组初始化classNamethis.tableData.forEach((item) => {if (item.className === "tableSelectedRowBgColor") {item.className = "normal";}});}},//点击行触发，切换复选框状态handleRowClick(row) {this.$refs.multipleTable.toggleRowSelection(row);if (row.className === "normal") {row.className = "tableSelectedRowBgColor";} else {row.className = "normal";}},}

3、className的回调方法

methods: {// 选中背景色tableRowClassName({ row }) {return row.className;},
}

4、最后不要忘了写颜色类名喔

<style>
.tableSelectedRowBgColor td {background-color: #fedcbd !important;
}
</style>

完整代码：

<template><el-tableref="multipleTable":data="tableData"tooltip-effect="dark"style="width: 100%"@row-click="handleRowClick"@select="handleSelect"@select-all="handleSelectAll":row-class-name="tableRowClassName"><el-table-column type="selection" width="55"> </el-table-column><el-table-column label="日期" width="120"><template slot-scope="scope">{{ scope.row.date }}</template></el-table-column><el-table-column prop="name" label="姓名" width="120"> </el-table-column><el-table-column prop="address" label="地址" show-overflow-tooltip></el-table-column></el-table>
</template><script>
export default {data() {return {tableData: [{date: "2016-05-03",name: "王小虎",address: "上海市普陀区金沙江路 1518 弄",className: "normal",},{date: "2016-05-02",name: "王小虎",address: "上海市普陀区金沙江路 1518 弄",className: "normal",},{date: "2016-05-04",name: "王小虎",address: "上海市普陀区金沙江路 1518 弄",className: "normal",},{date: "2016-05-01",name: "王小虎",address: "上海市普陀区金沙江路 1518 弄",className: "normal",},{date: "2016-05-08",name: "王小虎",address: "上海市普陀区金沙江路 1518 弄",className: "normal",},{date: "2016-05-06",name: "王小虎",address: "上海市普陀区金沙江路 1518 弄",className: "normal",},{date: "2016-05-07",name: "王小虎",address: "上海市普陀区金沙江路 1518 弄",className: "normal",},],};},methods: {// 手动点击勾选框触发的事件handleSelect(selection, row) {// selection,row  传递两个参数，row直接是对象// 只传一个参数得到的是数组if (row.className === "normal") {row.className = "tableSelectedRowBgColor";} else {row.className = "normal";}},// select-all 手动点击全选触发的事件handleSelectAll(selection) {if (selection.length > 0) {selection.forEach((item) => {if (item.className === "normal") {item.className = "tableSelectedRowBgColor";}});} else {// 空数组初始化classNamethis.tableData.forEach((item) => {if (item.className === "tableSelectedRowBgColor") {item.className = "normal";}});}},// 选中背景色tableRowClassName({ row }) {return row.className;},//点击行触发，切换复选框状态handleRowClick(row) {this.$refs.multipleTable.toggleRowSelection(row);if (row.className === "normal") {row.className = "tableSelectedRowBgColor";} else {row.className = "normal";}},},
};
</script><style>
.tableSelectedRowBgColor td {background-color: #fedcbd !important;
}
</style>

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