Object Storage Service:Range download (Browser.js SDK)

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

<head>
  <meta charset="UTF-8" />
  <title>Document</title>
</head>

<body>
  <button id='download'>Download</button>
  <!--Import the SDK file.-->
  <script type="text/javascript" src="https://gosspublic.alicdn.com/aliyun-oss-sdk-6.18.0.min.js"></script>
  <script type="text/javascript">    
    const client = new OSS({
      // Set region to the region where your bucket is located. For example, if your bucket is in the China (Hangzhou) region, set region to oss-cn-hangzhou.
      region: 'yourRegion',
      authorizationV4: true,
      // The temporary AccessKey ID and AccessKey secret obtained from Security Token Service (STS).
      accessKeyId: 'yourAccessKeyId',
      accessKeySecret: 'yourAccessKeySecret',
      // The security token (SecurityToken) obtained from STS.
      stsToken: 'yourSecurityToken',
      // Specify the bucket name. For example, examplebucket.
      bucket: "examplebucket",
    });

    // Get the DOM element.
    const download = document.getElementById('download')
    // For a 1000-byte file, the valid byte range is 0 to 999.
    // If the specified range is invalid, for example, the start or end position is a negative value or is greater than the file size, the entire file is downloaded.
    const start = 0, end = 999
    // Add a listener to the button.
    download.addEventListener('click', () => {
      client.get('example.txt',{
        headers: {          
          Range: `bytes=${start}-${end}`,
        },
      }).then(r => {
        // Convert the returned data into a downloadable object in BLOB format.
        const newBlob = new Blob([r.content], { type: r.res.headers['content-type'] });
        // Create an anchor element.
        const link = document.createElement('a')
        // Attach the href property to the element.
        link.href = window.URL.createObjectURL(newBlob)
        // Specify the name of the local file.
        link.download = 'example.txt'
        // Download the object.
        link.click()
        // Remove the attached URL.
        window.URL.revokeObjectURL(link.href)
      })
    })

  </script>
</body>

</html>