利用ExcelJS封装一个excel表格的导出

ExcelJS 操作和写入Excel 文件。
直接上代码，js部分：
exportFn.js

import ExcelJS from 'exceljs';
import { saveAs } from 'file-saver';export function exportExcleUtils(tHeader, filterVal, listData, fileName) {//设置工作簿属性const workbook = new ExcelJS.Workbook();workbook.creator = 'Me';workbook.lastModifiedBy = 'Her';workbook.created = new Date();workbook.modified = new Date();workbook.lastPrinted = new Date();//添加工作薄const worksheet = workbook.addWorksheet('sheet1');//计算标题宽let colWidth = calculateColumnWidth(tHeader);console.log(colWidth);let style = { alignment: { vertical: 'middle', horizontal: 'center' } };let columns = [];for (let i = 0; i < tHeader.length; i++) {let header = {header: tHeader[i],key: filterVal[i] ? filterVal[i] : i + '',width: colWidth[i] ? colWidth[i] + 20 : 10,style: JSON.parse(JSON.stringify(style)),};columns.push(header);}worksheet.columns = columns;//添加数据listData.forEach((item) => {worksheet.addRow(item);});worksheet.getRow(1).font = { name: '宋体', family: 4, size: 16, bold: true };fileName = fileName + '.xlsx';workbook.xlsx.writeBuffer().then((data) => {let blob = new Blob([data], {type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',});saveAs(blob, fileName);});
}export function calculateColumnWidth(tHeader) {let colWidth = [];//计算列宽for (let i = 0; i < tHeader.length; i++) {if (colWidth[i] && colWidth[i] < tHeader[i].length) {colWidth[i] = tHeader[i].length * 2;} else if (colWidth[i] === undefined) {colWidth[i] = tHeader[i].length * 2;}}return colWidth;
}

举个栗子：

//从公共函数中拿出
import { exportExcleUtils } from '@/libs/exportFn';
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//再写个按钮<el-button type="primary" @click="exportFn">导出按钮</el-button>
...
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...//导出exportFn() {let loadingInstance = Loading.service({text: '正在导出，请稍等...',});let table = this.selectedRowArr;//表头let tHeader = ['a','b','c','d',];//数据的里字段let filterVal = ['person','dog','cat','pig',];let fileName = '导出的表文件名';loadingInstance.close();exportExcleUtils(tHeader, filterVal, table, fileName);},

PS：上文的selectedRowArr变量是我项目里的，自己去塞数据，数组对象形式