前端下载pdf等文件

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport"
        content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <button onclick="downloadFile()">Download</button>
  <script>
    function downloadFile() {
      var request = new XMLHttpRequest();
      request.responseType = "blob";
　　　　// 传入文件链接
      request.open("GET", "http://124.128.28.25/20200524140900315079.pdf");
      request.onload = function () {
        var url = window.URL.createObjectURL(this.response);
        var a = document.createElement("a");
        document.body.appendChild(a);
        a.href = url;
        a.download = "your_download.pdf"
        a.click();
      }
      request.send();
    }
  </script>
</body>

</html>

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原文地址：https://www.cnblogs.com/javascripter/p/13447731.html