Bug: Deno install error: @eslint/css is missing a prefix

[MikeMcC399]

Environment

ESLint version: N/A
@eslint/css version: 0.4.0
Node version: v22.14.0 LTS
Deno version: 2.2.1
Operating System: Ubuntu 24.04.2 LTS

Which language are you using?

N/A

What did you do?

npm install -g deno
cd $(mktemp -d)
deno add @eslint/css

What did you expect to happen?

The README > Installation instructions should lead to a successful installation under Deno.

What actually happened?

Error message:

deno add @eslint/css
Created deno.json configuration file.
error: @eslint/css is missing a prefix. Did you mean `deno add jsr:@eslint/css`?

Link to Minimal Reproducible Example

See above

Participation

• I am willing to submit a pull request for this issue.

Additional comments

Probably the README > Installation is incorrect and the command should be:

deno add npm:@eslint/css

however this is also not successful. It results in:

$ deno add npm:@eslint/css
Add npm:@eslint/css@0.4.0
error: Error in @eslint/css@0.4.0 parsing version requirement for dependency "@types/css-tree": "file:./typings/css-tree"

Caused by:
    0: Invalid version requirement
    1: Unexpected character.
         file:./typings/css-tree
         ~

Installing an earlier release is successful:

deno add npm:@eslint/css@0.2.0

Related

• Bug: pnpm install fails ERR_PNPM_LINKED_PKG_DIR_NOT_FOUND #56
• Bug: Yarn v1 Classic install fails non-existing file /typings/css-tree #58

[nzakas]

We do also publish to JSR, so not sure whether the advice should be to install from npm or JSR at this point. Probably JSR?

[MikeMcC399]

@nzakas

We do also publish to JSR, so not sure whether the advice should be to install from npm or JSR at this point. Probably JSR?

Probably you are right.

I notice though that https://eslint.org/docs/latest/use/getting-started does not list instructions for installing eslint and @eslint/js with Deno. The same for https://eslint.org/docs/latest/use/command-line-interface which does not cover how to run ESLint under Deno.

I have never used Deno before, so I wouldn't be the right person to be filling in these documentation gaps.

[MikeMcC399]

Logs

with Deno 2.2.2 on Ubuntu 24.04.2 LTS

• jsr works
• npm fails

so it looks like jsr would be the better recommendation:

jsr

$ deno add jsr:@eslint/css
Created deno.json configuration file.
Add jsr:@eslint/css@0.4.0

npm

$ deno add npm:@eslint/css
Created deno.json configuration file.
Add npm:@eslint/css@0.4.0
error: Error in @eslint/css@0.4.0 parsing version requirement for dependency "@types/css-tree": "file:./typings/css-tree"

Caused by:
    0: Invalid version requirement
    1: Unexpected character.
         file:./typings/css-tree
         ~

[nzakas]

Yeah, we aren't officially doing anything with Deno because we haven't had time to do any deep investigation in how ESLint works (or doesn't). We just started publishing packages to JSR as a "just in case" situation (as well as just learning how it works).

[MikeMcC399]

@nzakas

In that case I suggest to change the command in the README to deno add jsr:@eslint/css and mark it with "experimental status".

[nzakas]

Sounds good to me. Do you want to make that change?

[MikeMcC399]

@nzakas

Sounds good to me. Do you want to make that change?

• I have submitted docs: add jsr and experimental to Deno command #71 for this change.

[MikeMcC399]

• I just noticed that @xbinaryx has submitted fix: correct deno install #70 😕 so you now have two PRs to choose from.