后端返回文件流pdf 下载

##1

import download from 'downloadjs'
//这个res是后台返回的文件流
download((new Blob([res])), 'contract.pdf', 'application/pdf')
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方法2 a标签下载

 let pdfContent = res;
      const blob = new Blob([pdfContent], { type: "application/pdf"});
	 
      const url = window.URL.createObjectURL(blob);
      // 创建a标签并设置下载属性
      const a = document.createElement("a");
      a.style.display = "none";
      a.href = url;
      a.download = "downloaded_file.pdf";

      // 将a标签添加到页面中并触发点击事件
      document.body.appendChild(a);
      a.click();

      // 释放URL对象
      window.URL.revokeObjectURL(url);
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