XHR Upload events are not being triggered

[gmarcos87]

Prerequisites

• [X] I confirm my issue is not in the opened issues
• [X] I confirm the Frequently Asked Questions didn't contain the answer to my issue

Environment check

• [X] I'm using the latest msw version
• [X] I'm using Node.js version 18 or higher

Browsers

No response

Reproduction repository

https://github.com/mswjs/msw/pull/2262

Reproduction steps

1. Create a XHR request
2. Add event listeners to the upload object https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/upload
3. Upload a blob using the XHR request

Current behavior

The upload events are not triggered at any time. This makes it impossible to test any functionality that depends on those events, such as upload progress.

Expected behavior

Events should be triggered as they normally happen in the browser.

[kettanaito]

Should be fixed by https://github.com/mswjs/msw/releases/tag/v2.4.4. XHR now correctly triggers upload events in Node.js (and browser-like). In the browser, that should've been working before as was.