Jordan Pittman d0f7f82787
Add plugin option documentation to the postcss plugin readme (#18940)
Closes https://github.com/tailwindlabs/tailwindcss.com/issues/2061

In lieu of finding a place to put this on the docs we can at least
document this in the readme for the plugin.

---------

Co-authored-by: Philipp Spiess <hello@philippspiess.com>
2025-09-18 13:00:35 -04:00

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<p align="center">
<a href="https://tailwindcss.com" target="_blank">
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</a>
</p>
<p align="center">
A utility-first CSS framework for rapidly building custom user interfaces.
</p>
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<a href="https://github.com/tailwindlabs/tailwindcss/actions"><img src="https://img.shields.io/github/actions/workflow/status/tailwindlabs/tailwindcss/ci.yml?branch=next" alt="Build Status"></a>
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</p>
---
## Documentation
For full documentation, visit [tailwindcss.com](https://tailwindcss.com).
## Community
For help, discussion about best practices, or feature ideas:
[Discuss Tailwind CSS on GitHub](https://github.com/tailwindcss/tailwindcss/discussions)
## Contributing
If you're interested in contributing to Tailwind CSS, please read our [contributing docs](https://github.com/tailwindcss/tailwindcss/blob/next/.github/CONTRIBUTING.md) **before submitting a pull request**.
---
## `@tailwindcss/postcss` plugin API
### Changing where the plugin searches for source files
You can use the `base` option (defaults to the current working directory) to change the directory in which the plugin searches for source files:
```js
import tailwindcss from "@tailwindcss/postcss"
export default {
plugins: [
tailwindcss({
base: path.resolve(__dirname, "./path)
})
]
}
```
### Enabling or disabling Lightning CSS
By default, this plugin detects whether or not the CSS is being built for production by checking the `NODE_ENV` environment variable. When building for production Lightning CSS will be enabled otherwise it is disabled.
If you want to always enable or disable Lightning CSS the `optimize` option may be used:
```js
import tailwindcss from "@tailwindcss/postcss"
export default {
plugins: [
tailwindcss({
// Enable or disable Lightning CSS
optimize: false,
})
]
}
```
It's also possible to keep Lightning CSS enabled but disable minification:
```js
import tailwindcss from "@tailwindcss/postcss"
export default {
plugins: [
tailwindcss({
optimize: { minify: false },
})
]
}
```
### Enabling or disabling `url(…)` rewriting
Our PostCSS plugin can rewrite `url(…)`s for you since it also handles `@import` (no `postcss-import` is needed). This feature is enabled by default.
In some situations the bundler or framework you're using may provide this feature itself. In this case you can set `transformAssetUrls` to `false` to disable this feature:
```js
import tailwindcss from "@tailwindcss/postcss"
export default {
plugins: [
tailwindcss({
// Disable `url(…)` rewriting
transformAssetUrls: false,
// Enable `url(…)` rewriting (the default)
transformAssetUrls: true,
})
]
}
```
You may also pass options to `optimize` to enable Lighting CSS but prevent minification:
```js
import tailwindcss from "@tailwindcss/postcss"
export default {
plugins: [
tailwindcss({
// Enables Lightning CSS but disables minification
optimize: { minify: false },
})
]
}
```