@tailwindcss/postcss

[VulcanTech-io]

What version of Tailwind CSS are you using?
"postcss": "^8.5.3",
"tailwindcss": "^4.0.9"
"@tailwindcss/postcss": "4.0.0-alpha.13",
"autoprefixer": "^10.4.20",

What build tool (or framework if it abstracts the build tool) are you using?

"next": "^15.2.1",
"turbo": "^2.4.4",

What version of Node.js are you using?

For example: v18.19.0

What browser are you using?

firefox

What operating system are you using?

macOS

Reproduction URL
https://github.com/VulcanTech-io/tailwindcss-postcss-plugin-issue
Describe your issue

const config = {
  plugins: {
    "@tailwindcss/postcss": {},
  },
};
export default config;

Adding this plugin breaks support for global imports from node modules when there is a font being imported from them.
for minimal reproduction "fix" comment out the plugin. But then tailwindcss is no longer working.

⨯ ./node_modules/@milkdown/crepe/lib/theme/common/style.css
Error evaluating Node.js code
CssSyntaxError: postcss-import: ~/turbo-test/node_modules/@milkdown/crepe/lib/theme/common/prosemirror.css:1:1: Failed to find '@milkdown/kit/prose/view/style/prosemirror.css'

[VulcanTech-io]

This might be a duplicate of #16636

[philipp-spiess]

Hey! We looked into your repro. There is indeed also #16636 an issue but the bug you are seeing is because the @tailwindcss/postcss plugin is on a stone-age version: https://github.com/VulcanTech-io/tailwindcss-postcss-plugin-issue/blob/2f44abb3ba121ce3bcddc7522bd6b2fe0cc27f3c/apps/docs/package.json#L18 If you update that to the latest v4 release it will show the error that #16636 is about. Going to close this issue and we'll continue to investigate #16636 👍