el-table表格动态添加列。多组数据拼接和多层级数据的处理-编程知识

提示：el-table表格动态添加列

文章目录

前言
一、多组数据拼接
二、多层级处理
三、实际应用中，为避免闪屏，可以表格数据统一渲染
总结

前言

需求：富文本编辑器

一、多组数据拼接

<template><div class="test"><el-table :data="tableData" stripe style="width: 100%"><el-table-column prop="date" label="日期" width="180"></el-table-column><el-table-column prop="name" label="姓名" width="180"></el-table-column><el-table-column prop="address" label="地址"></el-table-column><template><el-table-column v-for="item,index in addHeadColumn" :prop="item.key" :label="item.label" :key="index"></el-table-column></template>  </el-table></div>
</template><script>
export default {name: 'HelloWorld',data () {return {tableData: [{id:1,date: '2016-05-02',name: '张三',address: '上海市普陀区金沙江路 1518 弄'}, {id:2,date: '2016-05-04',name: '李四',address: '上海市普陀区金沙江路 1517 弄'}, {id:3,date: '2016-05-01',name: '王五',address: '上海市普陀区金沙江路 1519 弄'}, {id:4,date: '2016-05-03',name: '孙六',address: '上海市普陀区金沙江路 1516 弄'}],customTableData:[],userTableData:[],addHeadColumn:[],}},created(){this.getcustomTableData();},methods:{//获取自定义表头数据getcustomTableData(){this.addHeadColumn = [];this.customTableData = [];//模拟接口调用延时setTimeout(()=>{this.customTableData =[{ id:1,name: '张三',age:16,gender:'女'},{ id:2,name: '李四',age:27,gender:'男'},{ id:3,name: '王五',age:38,gender:'男'},{ id:4,name: '孙六',age:49,gender:'男'}];this.userTableData =[{ id:1,name: '张三',color:'green',hobby:'篮球'},{ id:2,name: '李四',color:'red',hobby:'足球'},{ id:3,name: '王五',color:'blue',hobby:'羽毛球'},{ id:4,name: '孙六',color:'orange',hobby:'乒乓球'}];this.addHeadColumn = [{key:'age',label:'年龄'},{key:'gender',label:'性别'},{key:'color',label:'幸运色'},{key:'hobby',label:'兴趣爱好'},]//tableData为基础表格数据，定制表头并渲染数据到tableData里let newTableData = [];for(let i=0;i<this.tableData.length;i++){newTableData[i] = this.tableData[i]||{};for(let j=0;j<this.customTableData.length;j++){let customTableDataJ = this.customTableData[j]||{};//当表格数据id相同时  合并数据if(newTableData[i].id == customTableDataJ.id){let obj = {...newTableData[i],...customTableDataJ};newTableData[i] = obj;}}for(let k=0;k<this.userTableData.length;k++){let userTableDataK = this.userTableData[k]||{};//当表格数据id相同时  合并数据if(newTableData[i].id == userTableDataK.id){let obj = {...newTableData[i],...userTableDataK};newTableData[i] = obj;}}}this.tableData = newTableData;},5000);},}
}
</script>

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二、多层级处理

<template><div class="test"><el-table :data="tableData" stripe style="width: 100%"><el-table-column prop="date" label="日期" width="180"></el-table-column><el-table-column prop="name" label="姓名" width="180"></el-table-column><el-table-column prop="address" label="地址"></el-table-column><template><el-table-column v-for="item,index in addHeadColumn" :prop="item.key+'Msg'" :label="item.label" :key="index"></el-table-column></template>  </el-table></div>
</template><script>
export default {name: 'HelloWorld',data () {return {tableData: [{id:1,date: '2016-05-02',name: '张三',address: '上海市普陀区金沙江路 1518 弄',msg:{age:16,gender:'女',color:'green',hobby:'篮球'}}, {id:2,date: '2016-05-04',name: '李四',address: '上海市普陀区金沙江路 1517 弄',msg:{age:27,gender:'男',color:'red',hobby:'足球'}}, {id:3,date: '2016-05-01',name: '王五',address: '上海市普陀区金沙江路 1519 弄',msg:{age:38,gender:'男',color:'blue',hobby:'羽毛球'}}, {id:4,date: '2016-05-03',name: '孙六',address: '上海市普陀区金沙江路 1516 弄',msg:{age:49,gender:'男',color:'orange',hobby:'乒乓球'}}],customTableData:[],userTableData:[],addHeadColumn:[],}},created(){this.getcustomTableData();},methods:{//获取自定义表头数据getcustomTableData(){this.addHeadColumn = [];this.customTableData = [];//模拟接口调用延时setTimeout(()=>{let matchObj = {age:'年龄',gender:'性别',color:'幸运色',hobby:'兴趣爱好'}let differenceStr = 'Msg';for(let i=0;i<this.tableData.length;i++){let msgObj = (this.tableData[i]||{}).msg||{};for(let key in msgObj){let obj = {key,label:matchObj[key]}let index = this.addHeadColumn.findIndex(item=>{return item.key == obj.key});if(index<0){this.addHeadColumn.push(obj)}//区分msg里字段与tableData[i]的字段有重复的，加个string区分，el-table-column的prop对应添加:prop="item.key+'Msg'"this.tableData[i][key+differenceStr] = msgObj[key];}}},5000);},}
}
</script>

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三、实际应用中，为避免闪屏，可以表格数据统一渲染

<template><div class="test"><el-table :data="tableData" stripe style="width: 100%"><!-- <el-table-column prop="date" label="日期" width="180"></el-table-column><el-table-column prop="name" label="姓名" width="180"></el-table-column><el-table-column prop="address" label="地址"></el-table-column> --><template><el-table-column v-for="item,index in addHeadColumn" :prop="index>2?item.key+'Msg':item.key" :label="item.label" :key="index"></el-table-column></template>  </el-table></div>
</template><script>
export default {name: 'HelloWorld',data () {return {tableData: [],customTableData:[],userTableData:[],addHeadColumn:[],}},created(){this.getcustomTableData();},methods:{//获取自定义表头数据getcustomTableData(){this.addHeadColumn = [];this.customTableData = [];this.addHeadColumn = [{key:'date',label:'日期'},{key:'name',label:'姓名'},{key:'address',label:'地址'},{key:'age',label:'年龄'},{key:'gender',label:'性别'},{key:'color',label:'幸运色'},{key:'hobby',label:'兴趣爱好'}];let responseData = [{id:1,date: '2016-05-02',name: '张三',address: '上海市普陀区金沙江路 1518 弄',msg:{age:16,gender:'女',color:'green',hobby:'篮球'}}, {id:2,date: '2016-05-04',name: '李四',address: '上海市普陀区金沙江路 1517 弄',msg:{age:27,gender:'男',color:'red',hobby:'足球'}}, {id:3,date: '2016-05-01',name: '王五',address: '上海市普陀区金沙江路 1519 弄',msg:{age:38,gender:'男',color:'blue',hobby:'羽毛球'}}, {id:4,date: '2016-05-03',name: '孙六',address: '上海市普陀区金沙江路 1516 弄',msg:{age:49,gender:'男',color:'orange',hobby:'乒乓球'}}];//模拟接口调用延时setTimeout(()=>{let differenceStr = 'Msg';for(let i=0;i<responseData.length;i++){let msgObj = (responseData[i]||{}).msg||{};for(let key in msgObj){responseData[i][key+differenceStr] = msgObj[key];}}this.tableData = responseData;},5000);},}
}
</script>