我曾尝试使用ExcelJS导出excel文件>
这是我在VS Code终端中的控制台
：ERROR in node_modules/exceljs/index.d.ts:1398:22 - error TS2307: Cannot find module 'stream'. 1398 read(stream: import('stream').Stream): Promise<Workbook>; ~~~~~~~~ node_modules/exceljs/index.d.ts:1424:23 - error TS2307: Cannot find module 'stream'. 1424 write(stream: import('stream').Stream, options?: Partial<XlsxWriteOptions>): Promise<void>; ~~~~~~~~ node_modules/exceljs/index.d.ts:1511:22 - error TS2307: Cannot find module 'stream'. 1511 read(stream: import('stream').Stream, options?: Partial<CsvReadOptions>): Promise<Worksheet>; ~~~~~~~~ node_modules/exceljs/index.d.ts:1531:23 - error TS2307: Cannot find module 'stream'. 1531 write(stream: import('stream').Stream, options?: Partial<CsvWriteOptions>): Promise<void>; ~~~~~~~~ node_modules/exceljs/index.d.ts:1828:19 - error TS2307: Cannot find module 'stream'. 1828 stream: import('stream').Stream; ~~~~~~~~ node_modules/exceljs/index.d.ts:1872:34 - error TS2503: Cannot find namespace 'NodeJS'. 1872 dictionary: Buffer | NodeJS.TypedArray | DataView | ArrayBuffer; // deflate/inflate only, empty dictionary by default ~~~~~~这里是app.component.html
<!DOCTYPE html> <html lang="en"> <head> <title>Bootstrap Example</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <!-- <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css"> --> <!-- serial must : first jquery then popper then bootstrap --> <!-- <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script> --> </head> <body> <div class="row"> <div class="col-md-2"> <button class="btn btn-secondary" (click)='downloadExcel()'>Download as Excel</button> </div> </div> </body> </html>这里是app.component.ts
import { Component } from '@angular/core'; import * as Excel from 'exceljs'; @Component({ selector: 'app-root', templateUrl: './app.component.html', styleUrls: ['./app.component.css'] }) export class AppComponent { title = 'resttest10'; async downloadExcel() { const date = new Date().toISOString().slice(0, 10).split('-').reverse().join('/'); console.log(date); const workbook = new Excel.Workbook(); const worksheet = workbook.addWorksheet('My Sheet'); worksheet.columns = [ { header: 'Id', key: 'id', width: 10 }, { header: 'Name', key: 'name', width: 32 }, { header: 'D.O.B.', key: 'dob', width: 15, } ]; worksheet.addRow({ id: 1, name: 'John Doe', dob: new Date(1970, 1, 1) }); worksheet.addRow({ id: 2, name: 'Jane Doe', dob: new Date(1965, 1, 7) }); // save under export.xlsx await workbook.xlsx.writeFile('export.xlsx'); // load a copy of export.xlsx const newWorkbook = new Excel.Workbook(); await newWorkbook.xlsx.readFile('export.xlsx'); const newworksheet = newWorkbook.getWorksheet('My Sheet'); newworksheet.columns = [ { header: 'Id', key: 'id', width: 10 }, { header: 'Name', key: 'name', width: 32 }, { header: 'D.O.B.', key: 'dob', width: 15, } ]; await newworksheet.addRow({ id: 3, name: 'New Guy', dob: new Date(2000, 1, 1) }); await newWorkbook.xlsx.writeFile('export2.xlsx'); console.log('File is written'); } }我不明白为什么它要寻找流模块（更有趣的是-找不到命名空间'NodeJS'-我可以无错误地运行所有其他有角度的NodeJS项目）
请指出为什么我不能导出Excel。
我曾尝试使用ExcelJS导出Excel文件，这是我在VS Code终端中的控制台：node_modules / exceljs / index.d.ts：1398：22中的错误-错误TS2307：找不到模块'stream'。 1398读
您不能在客户端直接写文件。该方法是要在nodejs的后端使用的。如果您期望在客户端下载此文件。您的代码应类似于：-
import { Component } from "@angular/core";
import * as Excel from "exceljs";
@Component({
selector: "my-app",
templateUrl: "./app.component.html",
styleUrls: ["./app.component.css"]
})
export class AppComponent {
title = "resttest10";
async downloadExcel() {
const date = new Date()
.toISOString()
.slice(0, 10)
.split("-")
.reverse()
.join("/");
console.log(date);
const workbook = new Excel.Workbook();
const worksheet = workbook.addWorksheet("My Sheet");
worksheet.columns = [
{ header: "Id", key: "id", width: 10 },
{ header: "Name", key: "name", width: 32 },
{ header: "D.O.B.", key: "dob", width: 15 }
];
worksheet.addRow({ id: 1, name: "John Doe", dob: new Date(1970, 1, 1) });
worksheet.addRow({ id: 2, name: "Jane Doe", dob: new Date(1965, 1, 7) });
workbook.xlsx.writeBuffer().then((data: any) => {
console.log("buffer");
const blob = new Blob([data], {
type:
"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
});
let url = window.URL.createObjectURL(blob);
let a = document.createElement("a");
document.body.appendChild(a);
a.setAttribute("style", "display: none");
a.href = url;
a.download = "export.xlsx";
a.click();
window.URL.revokeObjectURL(url);
a.remove();
});
}
}