Add formatter for CSS and JS

[tim-schilling]

Code of Conduct

• I agree to follow Django's Code of Conduct

Feature Description

The Django codebase should have a linter and code formatter for the CSS and JS.

There is more discussion on the forum.

Problem

From Tom:

For motivation, I find myself fairly often in the admin CSS (especially lately) and it’s reasonably laid out for the most part, but there are things that are a little off. Sometimes the indentation is different from the rest of the file, for example. The JS is in a bit worse shape I think, some of the files have whitespace issues. These could be fixed but it would be better to enforce them in a way that’s easier to review, so I think a formatter makes sense here. What’s annoying (for me) is that when editing files, sometimes my editor “fixes” the issues for me, then I have to revert them and save without formatting. If I don’t spot my editor’s work, it’s more annoying to fix. Of course I could turn this stuff off somewhere, but if it’s annoying for me I’m sure it’ll be annoying for others as well.

Request or proposal

request

Additional Details

I believe this should use Biome now that V2 has been released. However, I think that can be decided by the implementation team.

Implementation Suggestions

No response

[github-actions]

Thank you tim-schilling for sharing your idea! We have a lot of them so please be patient. You can see the current queue here.

Community instructions

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Reaction Guide

• 👍 This is something I would use
• 👎 This is something that would cause problems for me or Django
• 😕 I’m indifferent to this
• 🎉 This is an easy win

[tim-schilling]

This is being advanced to In Progress as there is consensus on the forum and this issue predates this repo. @knyghty (correct me if I'm wrong 😅) has volunteered to work on this. If folks want to help, please let them know.

[jacobtylerwalls]

Reiterating from forum: I'd like to have this in place before tackling bigger projects like avoiding the use of left/right in CSS: django/django#17560. I don't have an adequately informed opinion on the specific formatter we choose.

[mnayaab141-arch]

I’d like to take this issue and work on it. I’ve reviewed the proposal and the existing patch, and I’m happy to move it forward following Django’s conventions. @tim-schilling