onDownloadProgress changed after 1.6.8

[Fedec96]

Describe the bug

It appears that, starting from 1.7.0, onDownloadProgress's event doesn't fully complete: seems like the callback is not called upon the very last chunk. In fact, I use the event to expose the file transfer's percentage and it never reaches the 100%. It always stops between 98 and 99, but this problem never occurs with <= 1.6.8.

To Reproduce

Apologies, I cannot provide the URL to the 13 MB file, but here's the code and the output for 1.6.8 and 1.7.0+:

import axios from "axios";

axios<Blob>("...", {
  responseType: "blob",
  onDownloadProgress: (event) => console.log(event),
})
  .then(() => {
    /* ... */
  })
  .catch(() => {
    /* ... */
  });

This is what the console logs up to 1.6.8...

// First log
{
    "total": 13521971,
    "loaded": 8192,
    "progress": 0.0006058288395974226,
    "bytes": 8192,
    "event": { "isTrusted": true },
    "download": true
}

// ...somewhere in the middle...
{
    "total": 13521971,
    "loaded": 10081518,
    "progress": 0.7455657167139317,
    "bytes": 167936,
    "rate": 2928625,
    "estimated": 1.174767339621836,
    "event": { "isTrusted": true },
    "download": true
}

// Last log
{
    "total": 13521971,
    "loaded": 13521971,
    "progress": 1,
    "bytes": 208709,
    "rate": 3200495,
    "estimated": 0,
    "event": { "isTrusted": true },
    "download": true
}

...and this is what logs from 1.7.0 on:

// First log
{
    "total": 13521971,
    "loaded": 12279,
    "progress": 0.0009080776759541934,
    "bytes": 12279,
    "event": { "isTrusted": true },
    "lengthComputable": true,
    "download": true
}

// ...somewhere in the middle...
{
    "total": 13521971,
    "loaded": 5598458,
    "progress": 0.41402677168883145,
    "bytes": 94208,
    "rate": 1368536,
    "estimated": 5.789773159054639,
    "event": { "isTrusted": true },
    "lengthComputable": true,
    "download": true
}

// Last log
{
    "total": 13521971,
    "loaded": 13397242,
    "progress": 0.9907758269855778,
    "bytes": 335872,
    "rate": 1289121,
    "estimated": 0.09675507574541102,
    "event": { "isTrusted": true },
    "lengthComputable": true,
    "download": true
}

Code snippet

No response

Expected behavior

No response

Axios Version

1.7.0+

Adapter Version

No response

Browser

No response

Browser Version

No response

Node.js Version

No response

OS

No response

Additional Library Versions

No response

Additional context/Screenshots

No response

[tbl0605]

Hi,
same problem for me with version 1.7.1 (using latest versions of Chrome on Windows 10).
In my case the problem occurs randomly and more often with slow connections.

I can confirm that rolling back to 1.6.8 fixes the issue.

[sssanwar]

I confirm I have the same problem with version 1.7.2 on Firefox.

[gepbird]

Same issue starting from 1.7.0-beta.0 using `onUploadProgress.

Also the frequency of onUploadProgress reports decreased from ~20 report/sec to ~4 report/sec.

[Asdreu]

I have same problem in chrome when i use onUploadProgress, axios version is 1.7.2.