TypeScript error after upgrading postcss-preset-env from 9.3.0 to 9.4.0

[doberkofler]

Reproduction link

No response

Bug description

scripts-ts/bundle.ts:25:30 - error TS7016: Could not find a declaration file for module 'postcss-preset-env'. '/Users/doberkofler/MyDev/ljs_app/trunk/periscope/node_modules/postcss-preset-env/dist/index.cjs' implicitly has an 'any' type.
Try npm i --save-dev @types/postcss-preset-env if it exists or add a new declaration (.d.ts) file containing declare module 'postcss-preset-env';

25 import postcssPresetEnv from 'postcss-preset-env';
~~~~~~~~~~~~~~~~~~~~

Actual Behavior

No response

Expected Behavior

No response

Can you reproduce it with npx @csstools/csstools-cli <plugin-name> minimal-example.css?

N/A

npx Output

No response

Extra config

No response

What plugin are you experiencing this issue on?

PostCSS Preset Env

Plugin version

9.4.0

What OS are you experiencing this on?

macOS

Node Version

20.11.0

Validations

• Follow our Code of Conduct
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

Would you like to open a PR for this bug?

• I'm willing to open a PR

[romainmenke]

Hi @doberkofler,
Thank you for reaching out about this.

In the past we had an incorrect setup and config which made it so that types were broken for everyone but TypeScript silently ignored all this.
We fixed this by only providing types for es modules.

Since your project is commonjs you will get a warning that there aren't any types, which is correct since we don't provide any for commonjs.
You can add a @ts-expect-error directive or switch your config/project to es modules.

[romainmenke]

For more context on this change : #1031 (comment)

[doberkofler]

Thank you!

[johuhype]

Hello, i am specifying "type": "module" in my package.json and using
"import postcssPresetEnv from 'postcss-preset-env';" for the import.
But I am still getting the above mentioned error. Is there something else I need to do, to tell it that its ES modules?

[romainmenke]

Hi @johuhype,

You should check your tsconfig.
You should use nodeNext or node16 for the module option.

https://www.typescriptlang.org/docs/handbook/modules/theory.html#the-module-output-format

There might be other issues or configs that are needed, but that is the most common source of issues that I know of.

[johuhype]

That was fast. Thanks for the information!