引入所需依赖

import Excel from 'exceljs';import {saveAs} from 'file-saver';

创立工作簿并写入内容

const workbook = new Excel.Workbook();const worksheet = workbook.addWorksheet('My Sheet');worksheet.columns = [  { header: '编号', key: 'id', width: 10 },  { header: '姓名', key: 'name', width: 32 },  { header: '年龄', key: 'age', width: 10 }];var rows = [  ['001','MIKA','23'], // row by array  {id:'002', name: 'Kaz', age:'24'}];worksheet.addRows(rows);

利用 file-saver的saveAs保留至本地

const fileType="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet,application/vnd.ms-excel"workbook.xlsx.writeBuffer().then(data=>{  const blob = new Blob([data],{type:fileType});  saveAs(blob,'test.xlsx');})

进行到这一步，基本上就曾经实现了保留excel表格到本地的需要。
参考：exceljs官网文档