如何在react或javascript中将下面的流转换为pdf文件

import { PDFDocument } from 'pdf-lib';

const createPDF = async (stream) => {
  // 创建一个新的PDF文档
  const pdfDoc = await PDFDocument.create();

  // 将流转换为Uint8Array
  const data = await stream.arrayBuffer();
  const uint8Array = new Uint8Array(data);

  // 将Uint8Array添加到PDF文档中
  const existingPdfBytes = await pdfDoc.load(uint8Array);
  const existingPdf = await pdfDoc.copyPages(existingPdfBytes, [0]);
  pdfDoc.addPage(existingPdf[0]);

  // 保存PDF文档
  const pdfBytes = await pdfDoc.save();

  // 将PDF字节数组转换为Blob对象
  const pdfBlob = new Blob([pdfBytes], { type: 'application/pdf' });

  // 创建一个下载链接并点击下载
  const downloadLink = document.createElement('a');
  downloadLink.href = URL.createObjectURL(pdfBlob);
  downloadLink.download = 'converted.pdf';
  downloadLink.click();
};

const stream = // 你的流对象

createPDF(stream);