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一：安装依赖

npm install  xlsx file-saver  --save

二：在组件中导入

import FileSaver from 'file-saver'
import XLSX from 'xlsx'

三：给对应表格添加id，绑定方法

<el-table id='tableDom'>
<el-button @click="exportExcel">导出 Excel</el-button>

四：methods中写入方法

const exportExcel = () => {var ws1 = XLSX.utils.table_to_book(document.querySelector('#tableDom'));//对应要导出的表格id/* get binary string as output */var wbOut = XLSX.write(ws1, {bookType: "xlsx",bookSST: true,type: "array"});try {FileSaver.saveAs(new Blob([wbOut], {type: "application/octet-stream"}),"demo.xlsx"  // 可以自定义导出文件的名称);} catch (e) {if (typeof console !== "undefined") console.log(e, wbOut);}return wbOut;
}

element-ui表格导出及导出所有分页数据
VUE element-ui 之table表格导出Excel（自定义表头+自定义导出字段内容）