Fixes#16636
This PR enables URL rebasing for PostCSS. Furthermore it fixes an issue
where transitive imports rebased against the importer CSS file instead
of the input CSS file. While fixing this we noticed that this is also
broken in Vite right now and that our integration test swallowed that
when testing because it did not import any Tailwind CSS code and thus
was not considered a Tailwind file.
## Test plan
- Added regression integration tests
- Also validated it against the repro of
https://github.com/tailwindlabs/tailwindcss/issues/16962:
<img width="1149" alt="Screenshot 2025-03-05 at 16 41 01"
src="https://github.com/user-attachments/assets/85396659-d3d0-48c0-b1c7-6125ff8e73ac"
/>
---------
Co-authored-by: Robin Malfait <malfait.robin@gmail.com>
Co-authored-by: Jordan Pittman <jordan@cryptica.me>
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Co-authored-by: Adam Wathan <adam.wathan@gmail.com>
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---------
Co-authored-by: Adam Wathan <4323180+adamwathan@users.noreply.github.com>
Closes#16039
This PR changes our URL rebasing logic used with Vite so that it does
not rebase URLs that look like common alias paths (e.g. urls starting in
`~`, `@` or `#`, etc.). Unfortunately this is only an approximation and
you can configure an alias for a path that starts with a regular
alphabetical character (e.g. `foo` => `./my/foo`) so this isn't a
perfect fix, however in practice most aliases will be prefixed with a
symbol to make it clear that it's an alias anyways.
One alternative we have considered is to only rebase URLs that we know
are relative (so they need to start with a `.`). This, however, will
break common CSS use cases where urls are loaded like this:
```css
background: image-set(
url('image1.jpg') 1x,
url('image2.jpg') 2x
);
```
So making this change felt like we only trade one GitHub issue for
another one.
In a more ideal scenario we try to resolve the URL with the Vite
resolver (we have to run the resolver and can't rely on the `resolve`
setting alone due to packages like
[`vite-tsconfig-paths`](https://www.npmjs.com/package/vite-tsconfig-paths)),
however even then we can have relative paths being resolvable to
different files based on wether they were rebased or not (e.g. when an
image with the same filename exists in two different paths).
So ultimately we settled on extending the already existing blocklist
(which we have taken from the Vite implementation) for now.
## Test plan
- Added unit test and it was tested with the Vite playground.
---------
Co-authored-by: Robin Malfait <malfait.robin@gmail.com>
Here is everything you need to know about this update. Please take a
good look at what changed and the test results before merging this pull
request.
### What changed?
#### ✳️ enhanced-resolve (5.17.1 → 5.18.0) ·
[Repo](https://github.com/webpack/enhanced-resolve)
<details>
<summary>Release Notes</summary>
<h4><a
href="https://github.com/webpack/enhanced-resolve/releases/tag/v5.18.0">5.18.0</a></h4>
<blockquote><h3 dir="auto">Features</h3>
<ul dir="auto">
<li>Added wildcards support for aliases</li>
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<li><a
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5.18.0</code></a></li>
<li><a
href="88ceebe3cc"><code>feat:
add wildcards support for aliases</code></a></li>
<li><a
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Here is everything you need to know about this update. Please take a
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request.
### What changed?
#### ✳️ jiti (2.4.0 → 2.4.2) · [Repo](https://github.com/unjs/jiti) ·
[Changelog](https://github.com/unjs/jiti/blob/main/CHANGELOG.md)
<details>
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<h4><a
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<li><a
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use native require cache of loaded entries only (#348)</code></a></li>
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We recently introduced some better instrumentation
(https://github.com/tailwindlabs/tailwindcss/pull/15303) which uses the
new `using` keyword. I made sure that this was compiled correctly for
environments where `using` is not available yet.
The issue is that this also relies on `Symbol.dispose` being available.
In my testing on our minimal required Node.js version (18) it did work
fine. However, turns out that I was using `18.20.x` locally where
`Symbol.dispose` **_is_** available, but on older version of Node.js 18
(e.g.: `18.17.x`) it is **_not_** available. This now results in some
completely broken builds, e.g.: when running on Cloudflare Pages. See:
#15399
I could reproduce this error in CI, by temporarily downgrading the used
Node.js version to `18.17.0`. See:
<img width="1142" alt="image"
src="https://github.com/user-attachments/assets/5bf30f80-9ca0-40d9-ad02-d1ffb4e0e5dd"
/>
Implementing the proper polyfill, as recommended by the TypeScript docs
( see:
https://www.typescriptlang.org/docs/handbook/release-notes/typescript-5-2.html#:~:text=Symbol.dispose,-??=%20Symbol(%22Symbol.dispose
), the error goes away. (If you look at CI after the polyfill, it still
fails but for different reasons unrelated to this change)
Fixes: #15399
---
## Test plan
1. I reproduced it in CI, and I kept the commits so that you can take a
look where it fails with the `Object not disposable`.
2. Using the provided reproduction from #15399:
### Before
It works on Node.js v18.20.x, but switching to Node.js v18.17.x you can
see it fail:
<img width="1607" alt="image"
src="https://github.com/user-attachments/assets/cb6ab73a-8eb2-4003-bab7-b2390f1c879d"
/>
### After
Using pnpm's overrides, we can apply the fix from this PR and test it in
the reproduction. You'll notice that it now works in both Node.js
v18.20.x and v18.17.x
<img width="1604" alt="image"
src="https://github.com/user-attachments/assets/b3a65557-0658-4cb0-a2f9-e3079c7936d5"
/>
This PR improves the `@tailwindcss/postcss` integration by using direct
AST transformations between our own AST and PostCSS's AST. This allows
us to skip a step where we convert our AST into a string, then parse it
back into a PostCSS AST.
The only downside is that we still have to print the AST into a string
if we want to optimize the CSS using Lightning CSS. Luckily this only
happens in production (`NODE_ENV=production`).
This also introduces a new private `compileAst` API, that allows us to
accept an AST as the input. This allows us to skip the PostCSS AST ->
string -> parse into our own AST step.
To summarize:
Instead of:
- Input: `PostCSS AST` -> `.toString()` -> `CSS.parse(…)` -> `Tailwind
CSS AST`
- Output: `Tailwind CSS AST` -> `toCSS(ast)` -> `postcss.parse(…)` ->
`PostCSS AST`
We will now do this instead:
- Input: `PostCSS AST` -> `transform(…)` -> `Tailwind CSS AST`
- Output: `Tailwind CSS AST` -> `transform(…)` -> `PostCSS AST`
---
Running this on Catalyst, the time spent in the `@tailwindcss/postcss`
looks like this:
- Before: median time per run: 19.407687 ms
- After: median time per run: 11.8796455 ms
This is tested on Catalyst which roughly generates ~208kb worth of CSS
in dev mode.
While it's not a lot, skipping the stringification and parsing seems to
improve this step by ~40%.
Note: these times exclude scanning the actual candidates and only time
the work needed for parsing/stringifying the CSS from and into ASTs. The
actual numbers are a bit higher because of the Oxide scanner reading
files from disk. But since that part is going to be there no matter
what, it's not fair to include it in this benchmark.
---------
Co-authored-by: Jordan Pittman <jordan@cryptica.me>
Closes#15269
This PR fixes an issue where our Vite extension was rebasing absolute
urls inside `@import`-ed files. We forgot to cover this when we
implemented the URL rebasing.
## Test Plan
We validated that this fixes the repro in #15269:
<img width="851" alt="Screenshot 2024-12-02 at 18 07 35"
src="https://github.com/user-attachments/assets/3b2c2be3-1f73-469e-9f64-301c6b948b02">
Also added a unit test for this.
Co-authored-by: Jordan Pittman <jordan@cryptica.me>
This PR improves the performance of the `@tailwindcss/postcss` and
`@tailwindcss/vite` implementations.
The issue is that in some scenarios, if you have multiple `.css` files,
then all of the CSS files are ran through the Tailwind CSS compiler. The
issue with this is that in a lot of cases, the CSS files aren't even
related to Tailwind CSS at all.
E.g.: in a Next.js project, if you use the `next/font/local` tool, then
every font you used will be in a separate CSS file. This means that we
run Tailwind CSS in all these files as well.
That said, running Tailwind CSS on these files isn't the end of the
world because we still need to handle `@import` in case `@tailwind
utilities` is being used. However, we also run the auto source detection
logic for every CSS file in the system. This part is bad.
To solve this, this PR introduces an internal `features` to collect what
CSS features are used throughout the system (`@import`, `@plugin`,
`@apply`, `@tailwind utilities`, etc…)
The `@tailwindcss/postcss` and `@tailwindcss/vite` plugin can use that
information to decide if they can take some shortcuts or not.
---
Overall, this means that we don't run the slow parts of Tailwind CSS if
we don't need to.
---------
Co-authored-by: Adam Wathan <adam.wathan@gmail.com>
Closes#15159
This PR extends the `@tailwindcss/node` packages to be able to overwrite
the CSS and JS resolvers. This is necessary as some bundlers, in
particular Vite, have a custom module resolution system that can be
individually configured. E.g. in Vite it is possible to add custom
[resolver
configs](https://vite.dev/config/shared-options.html#resolve-conditions)
that is expected to be taken into account.
With the new `customCssResolver` and `customJsResolver` option, we're
able to use the Vite resolvers which take these configs into account.
## Test Plan
Tested in the playground by configuring [resolver
conditions](https://vite.dev/config/shared-options.html#resolve-conditions)
(with Vite 5.4 and Vite 6 beta). An integration test was added for both
the JS and CSS resolvers to ensure it keeps working as expected.
---------
Co-authored-by: Adam Wathan <adam.wathan@gmail.com>
This PR updates the `jiti` dependency we use for plugin loading to the
latest stable release.
## Test Plan
This was relying on integration tests which contains example of
TypeScript configs. It's also rebased to include the new examples from
https://github.com/tailwindlabs/tailwindcss/pull/15041.
This PR uses the `enhanced-resolve` instead of
`createRequire(…).resolve` which improves the usability when running the
upgrade tool locally using Bun.
While testing, we also noticed that it is not possible to use a
`cjs`-only plugin inside of an `esm` project. It was also not possible
to use an `esm`-only plugin inside of a `cjs` project.
# Test plan
We added integration tests in both the CLI (the CLI is an mjs project)
and in the PostCSS (where we can configure a `cjs` and `esm` PostCSS
config) integration tests where we created an `esm` and `cjs` based
project with 4 plugins (`cjs`-only, `esm`-only, and TypeScript based
plugins: `cts`-only and `mts`-only).
Closes#15012
We do not have replacements for these plugins _just yet_. In order to
increase compatibility with setups that rely on some of these legacy
plugins, this PR bundles `@tailwindcss/forms`,
`@tailwindcss/typography`, and `@tailwindcss/aspect-ratio` (after
https://github.com/tailwindlabs/tailwindcss/pull/15029) with the
standalone build now.
In comparison to v3, this omits the `@tailwindcss/container-queries`
plugin since is not a first-party feature of Tailwind CSS v4.
## Test Plan
Added an integration test. I also tested this by running the standalone
binary in a temporary folder with as simple input css:
```css
@import "tailwindcss";
@plugin "@tailwindcss/typography";
```
We noticed that in the current alpha 34 release, the `package.json` file
of the `@tailwindcss/node` package only defines `tailwindcss` as a dev
dependency. This makes it very easy for version mismatches to happen
when a v3 version (or an earlier v4 alpha for that matter) was installed
in the same project:
```json
{
"name": "@tailwindcss/node",
"version": "4.0.0-alpha.34",
"description": "A utility-first CSS framework for rapidly building custom user interfaces.",
"license": "MIT",
"repository": {
"type": "git",
"url": "https://github.com/tailwindlabs/tailwindcss.git",
"directory": "packages/@tailwindcss-node"
},
"bugs": "https://github.com/tailwindlabs/tailwindcss/issues",
"homepage": "https://tailwindcss.com",
"files": [
"dist/"
],
"publishConfig": {
"provenance": true,
"access": "public"
},
"exports": {
".": {
"types": "./dist/index.d.ts",
"import": "./dist/index.mjs",
"require": "./dist/index.js"
},
"./require-cache": {
"types": "./dist/require-cache.d.ts",
"default": "./dist/require-cache.js"
},
"./esm-cache-loader": {
"types": "./dist/esm-cache.loader.d.mts",
"default": "./dist/esm-cache.loader.mjs"
}
},
"devDependencies": {
"tailwindcss": "4.0.0-alpha.34"
},
"dependencies": {
"enhanced-resolve": "^5.17.1",
"jiti": "^2.0.0-beta.3"
},
"scripts": {
"build": "tsup-node",
"dev": "pnpm run build -- --watch"
}
}
```
Furthermore, we were trying to fix issues where our integration test
setup could not install `tailwindcss@3` because of how we did pnpm
overrides.
This PR fixes this by:
- Ensuring every client that calls into `tailwindcss` core marks it as a
version-pinned dependency. You are still required to install
`tailwindcss` in your project along side a client (e.g.
`@tailwindcss/vite`) but we now only use your installed version for
importing the respective `.css` files. For the core logic, we are now
requiring each package to use `tailwindcss` at the same version. This
should help resolve issues like
https://github.com/tailwindlabs/tailwindcss/discussions/14652
- We tried to eliminate the dependency on `tailwindcss` from the
`@tailwindcss/upgrade` package. Unfortunately this is not possible to do
right now because we need to load the CSS files from v4 to create the
right environment. In a future version we could bundle the required CSS
files with `@tailwidncss/upgrade` but it doesn't seem necessary for now.
- We then changed our integration test overrides to only override the
`tailwindcss` package that are dependencies of the known list of
packages that we have `tailwindcss` dependencies on: `@tailwindcss/node`
and `@tailwindcss/upgrade`. This ensures that we can install v3 of
`tailwindcss` in the integration tests and it will work. Something we
want to do for some upgrade tests.
# Test plan
Integration work again. Furthermore we added a quick setup with the CLI
using the local tarballs and ensured it works:
```bash
pnpm init
pnpm install ../../tailwindcss/dist/tailwindcss-cli.tgz
pnpm install ../../tailwindcss/dist/tailwindcss.tgz
echo '@import "tailwindcss";' > index.css
echo '<div class="underline"></div>' > index.html
pnpm tailwindcss -i index.css -o out.css
cat out.css
```
Fixes#14784
This is an alternative to #14850 in which we actually perform url
rewriting / rebasing ourselves. We ported a large portion of the
URL-rewriting code from Vite (with attribution) to use here with some
minor modifications. We've added test cases for the url rewriting so
verifying individual cases is easy. We also wrote integration tests for
Vite that use PostCSS and Lightning CSS that verify that files are found
and inlined or relocated/renamed as necessary.
We also did some manual testing in the Playground to verify that this
works as expected across several CSS files and directories which you can
see a screenshot from here:
<img width="1344" alt="Screenshot 2024-11-05 at 10 25 16"
src="https://github.com/user-attachments/assets/ff0b3ac8-cdc9-4e26-af79-36396a5b77b9">
---------
Co-authored-by: Philipp Spiess <hello@philippspiess.com>
This PR introduces a new `source(…)` argument and improves on the
existing `@source`. The goal of this PR is to make the automatic source
detection configurable, let's dig in.
By default, we will perform automatic source detection starting at the
current working directory. Auto source detection will find plain text
files (no binaries, images, ...) and will ignore git-ignored files.
If you want to start from a different directory, you can use the new
`source(…)` next to the `@import "tailwindcss/utilities"
layer(utilities) source(…)`.
E.g.:
```css
/* ./src/styles/index.css */
@import 'tailwindcss/utilities' layer(utilities) source('../../');
```
Most people won't split their source files, and will just use the simple
`@import "tailwindcss";`, because of this reason, you can use
`source(…)` on the import as well:
E.g.:
```css
/* ./src/styles/index.css */
@import 'tailwindcss' source('../../');
```
Sometimes, you want to rely on auto source detection, but also want to
look in another directory for source files. In this case, yuo can use
the `@source` directive:
```css
/* ./src/index.css */
@import 'tailwindcss';
/* Look for `blade.php` files in `../resources/views` */
@source '../resources/views/**/*.blade.php';
```
However, you don't need to specify the extension, instead you can just
point the directory and all the same automatic source detection rules
will apply.
```css
/* ./src/index.css */
@import 'tailwindcss';
@source '../resources/views';
```
If, for whatever reason, you want to disable the default source
detection feature entirely, and only want to rely on very specific glob
patterns you define, then you can disable it via `source(none)`.
```css
/* Completely disable the default auto source detection */
@import 'tailwindcss' source(none);
/* Only look at .blade.php files, nothing else */
@source "../resources/views/**/*.blade.php";
```
Note: even with `source(none)`, if your `@source` points to a directory,
then auto source detection will still be performed in that directory. If
you don't want that, then you can simply add explicit files in the globs
as seen in the previous example.
```css
/* Completely disable the default auto source detection */
@import 'tailwindcss' source(none);
/* Run auto source detection in `../resources/views` */
@source "../resources/views";
```
---------
Co-authored-by: Jordan Pittman <jordan@cryptica.me>
Co-authored-by: Adam Wathan <4323180+adamwathan@users.noreply.github.com>
This PR fixes an issue when trying to resolve plugins with `exports` in
their `package.json`, like `@headlessui/tailwindcss`. The missing
`conditionNames` in the enhanced resolver config would cause it to not
properly look up the name.
## Test Plan
I added a test using the `postcss` setup (the existing plugin tests are
inside the CLI setup but the CLI can only ever run in Module JS mode).
To ensure the tests are resolving to the right environment (CJS vs MJS),
I added logging of the `import.meta.url` value to the resolver code.
When run, this was the output:
Co-authored-by: Adam Wathan <adam.wathan@gmail.com>
