Angular8 -下载Excel .xlsx将base64字符串保存到文件中

import { Component } from '@angular/core';

@Component({
  selector: 'app-root',
  template: `<button (click)="downloadExcel()">Download Excel</button>`
})
export class AppComponent {
  downloadExcel() {
    const base64Data = '...'; // 这里应该是你的 base64 编码的 Excel 数据
    const link = document.createElement('a');
    const data = atob(base64Data);
    const byteCharacters = new Array(data.length);
    for (let i = 0; i < data.length; i++) {
      byteCharacters[i] = data.charCodeAt(i);
    }
    const byteArrays = new Uint8Array(byteCharacters);
    const blob = new Blob([byteArrays], { type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' });
    const url = window.URL.createObjectURL(blob);
    link.href = url;
    link.download = 'data.xlsx';
    link.click();
    window.URL.revokeObjectURL(url);
  }
}