WP 6.7RC-1: wp.mediaUtils.uploadMedia no longer returns Promise

[elzadj]

Description

Hi all!

We were testing our plugin on WordPress 6.7RC-1, and noticed that our media uploader no longer works. Managed to track it to the differences in wp.mediaUtils.uploadMedia between 6.6.2 and 6.7RC-1.

We use this simple code for tests (based on the readme ):

wp.mediaUtils.uploadMedia( {
    filesList: [ new File( [ 'foo' ], 'foo.txt', { type: 'text/plain' } ) ],
    onFileChange: ( [ fileObj ] ) => console.log( fileObj ),
    onError: console.error,
} );

Compare the results between versions:

6.7RC-1:

6.6.2:

We can adjust code in our plugin to make it work on both versions, but would be nice to know if this change was intentional. Thanks.

Step-by-step reproduction instructions

1. Update to 6.7RC-1
2. Open Gutenberg Editor.
3. Run

   wp.mediaUtils.uploadMedia( {
   filesList: [ new File( [ 'foo' ], 'foo.txt', { type: 'text/plain' } ) ],
   onFileChange: ( [ fileObj ] ) => console.log( fileObj ),
   onError: console.error,
   } ); 

in your console.

4. Check the result.

Screenshots, screen recording, code snippet

No response

Environment info

• WordPress 6.7RC-1
• Chrome Version 130.0.6723.58 (Official Build) (64-bit)
• Ubuntu 24.04.02

Please confirm that you have searched existing issues in the repo.

• [x] Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

• [x] Yes

Please confirm which theme type you used for testing.

• [x] Block
• [ ] Classic
• [ ] Hybrid (e.g. classic with theme.json)
• [ ] Not sure