Typescript 使用XLSX时，Buffer.isBuffer不是Angular 6.1.10中的函数

正在尝试实现从数组生成Excel工作表。使用下面的代码显示缓冲区。isbuffer不起作用。 当在项目外部单独使用时，相同的代码可以很好地工作

有人能在这个问题上帮忙吗？提前谢谢

卓越服务 app.component.ts app.component.html

导出到excel

model.ts 控制台错误

@Injectable()
export class ExcelService {

  constructor() {
  }

  static toExportFileName(excelFileName: string): string {
    return `${excelFileName}_export_${new Date().getTime()}.xlsx`;
  }

  public exportAsExcelFile(json: any[], excelFileName: string): void {
    const worksheet: XLSX.WorkSheet = XLSX.utils.json_to_sheet(json);
    const workbook: XLSX.WorkBook = {Sheets: {'data': worksheet}, SheetNames: ['data']};
    XLSX.writeFile(workbook, ExcelService.toExportFileName(excelFileName));
  }
}

exportToExcel(event) {
    this.excelService.exportAsExcelFile(PERSONS, 'persons');
}

    id: number;
    name: String;
    surname: String;
    age: number;
}


export const PERSONS: Person[] = [
    {
        id: 1,
        name: 'Thomas',
        surname: 'Novicky',
        age: 21
    },
    {
        id: 2,
        name: 'Adam',
        surname: 'Tracz',
        age: 12
    },
    {
        id: 3,
        name: 'Steve',
        surname: 'Laski',
        age: 38
    }
];

VM1526 CommentTableComponent.ngfactory.js:453 ERROR TypeError: Buffer.isBuffer is not a function
    at Function.module.exports.test (VM1423 vendor.js:182405)
    at Object.exports.getTypeOf (VM1423 vendor.js:183869)
    at Object.exports.transformTo (VM1423 vendor.js:183851)
    at JSZipSync.utf8encode (VM1423 vendor.js:183183)
    at JSZipSync.generate (VM1423 vendor.js:183085)
    at write_zip_type (VM1423 vendor.js:210416)
    at writeSync (VM1423 vendor.js:210506)
    at Object.writeFileSync (VM1423 vendor.js:210529)
    at ExcelService.push../src/app/shared/services/files/excel.service.ts.ExcelService.exportAsExcelFile (VM1424 main.js:6982)
    at CommentTableComponent.push../src/app/shared/containers/comment-table/comment-table.component.ts.CommentTableComponent.exportToExcel (VM1424 main.js:4847)```