el-table纵向垂直表头

参考：https://www.jianshu.com/p/1f38eaffd070

<el-tablestyle="width: 100%":data="getValues":show-header="false"border:cell-style="cellStyle"
><el-table-columnv-for="(item, index) in getHeaders":key="index":prop="item"></el-table-column>
</el-table>

data() {return {headers: [{prop: 'date',label: '套餐交割时间',},{prop: 'name',label: '价格（元/kWh）',},],tableData: [{date: '2016-05-02',name: '王小虎',address: '上海市普陀区金沙江路 1518 弄'},{date: '2016-05-04',name: '王小虎',address: '上海市普陀区金沙江路 1517 弄'},{date: '2016-05-01',name: '王小虎',address: '上海市普陀区金沙江路 1519 弄'},{date: '2016-05-03',name: '王小虎',address: '上海市普陀区金沙江路 1516 弄'}]}},

computed: {getHeaders() {return this.tableData.reduce((pre, cur, index) => pre.concat(`value${index}`), ['title'])},getValues() {return this.headers.map(item => {return this.tableData.reduce((pre, cur, index) => Object.assign(pre, {['value' + index]: cur[item.prop]}), {'title': item.label,});});}
},

methods: {cellStyle ({row, column, rowIndex, columnIndex}) {if(columnIndex===0) {return 'background: #F5F7FA; textAlign: center'}return 'textAlign: center'}},