在vue和element-ui的table中实现分页复选功能

背景

后台管理系统中，使用表格展示数据时，可能的需求是多项选择然后进行批量操作，也期望能翻页多选。

实现

页面结构如下

<el-table class="table" :data="tableData" border  @selection-change="handleSelectionChange" ref="asTable"> <el-table-column width="50" type="selection" fixed="left" > </el-table-column> <el-table-column prop="id" label="ID" > </el-table-column> <el-table-column prop="name" label="名字" > </el-table-column> <el-table-column label="操作" width="100" > <template slot-scope="scope">  <el-button type="primary" plain size="small" @click="handleEdit(scope.row)" >编辑</el-button> </template> </el-table-column></el-table><el-pagination background @current-change="handleCurrentChange" :current-page.sync="pagination.currentPage" :page-size="pagination.size" layout="total, prev, pager, next, jumper" :total="pagination.total" slot="pagination"></el-pagination>

模拟数据实现分页

data () { return { tableData: [], multipleSelection: [], pagination: {  currentPage: 1,  size: 10,  total: 1000 } }},beforeMount () { this.fetchData()},methods: { fetchData () { this.tableData = [] let start = (this.pagination.currentPage - 1) * this.pagination.size let end = this.pagination.currentPage * this.pagination.size setTimeout(_ => {  for (let i = start; i < end; i++) {  this.tableData.push({   id: i,   name: `王${i}兰`  })  } } }, handleCurrentChange () { this.fetchData() }, handleSelectionChange (val) { this.multipleSelection = val },}

展示已选择项

<div class="result"> 已选：{{ allMultipleSelection }}</div>allMultipleSelection: [],

在复选事件中对所选项进行存储

主要思路就是：

handleSelectionChange (val) { this.multipleSelection = val // @tip 实现分页复选 console.log(val, 'selection') setTimeout(_ => { this.resolveAllSelection() }, 50)},resolveAllSelection () { let currentPageData = this.tableData.map(item => item[this.uniqueKey]) // 当前页所有数据 let currentPageSelected = this.multipleSelection.map(item => item[this.uniqueKey]) // 当前页已选数据 let currentPageNotSelected = currentPageData.filter(item => !currentPageSelected.includes(item)) // 当前页未选数据 // 将当前页已选数据放入所有已选项 currentPageSelected.forEach(item => { if (!this.allMultipleSelection.includes(item)) {  this.allMultipleSelection.push(item) } }) // 将所有已选项数据中当前页没选择的项移除 currentPageNotSelected.forEach(item => { let idx = this.allMultipleSelection.indexOf(item) if (idx > -1) {  this.allMultipleSelection.splice(idx, 1) } }) console.log(this.allMultipleSelection, 'all')},