This PR adds a new standalone client: A single-binary file that you can
use to run Tailwind v4 without having a node setup. To make this work we
use Bun's single-binary build which can properly package up native
modules and the bun runtime for us so we do not have to rely on any
expand-into-tmp-folder-at-runtime workarounds.
When running locally, `pnpm build` will now standalone artifacts inside
`packages/@tailwindcss-standalone/dist`. Note that since we do not build
Oxide for other environments in the local setup, you won't be able to
use the standalone artifacts for other platforms in local dev mode.
Unfortunately Bun does not have support for Windows ARM builds yet but
we found that using the `bun-baseline` runtime for Windows x64 would
make the builds work fine in ARM emulation mode:

Some Bun related issues we faced and worked around:
- We found that the regular Windows x64 build of `bun` does not run on
Windows ARM via emulation. Instead, we have to use the `bun-baseline`
builds which emulate correctly.
- When we tried to bundle artifacts with [embed
directories](https://bun.sh/docs/bundler/executables#embed-directories),
node binary dependencies were no longer resolved correctly even though
they would still be bundled and accessible within the [`embeddedFiles`
list](https://bun.sh/docs/bundler/executables#listing-embedded-files).
We worked around this by using the `import * as from ... with { type:
"file" };` and patching the resolver we use in our CLI.
- If you have an import to a module that is used as a regular import
_and_ a `with { type: "file" }`, it will either return the module in
both cases _or_ the file path when we would expect only the `with {
type: "file" }` import to return the path. We do read the Tailwind CSS
version via the file system and `require.resolve()` in the CLI and via
`import * from './package.json'` in core and had to work around this by
patching the version resolution in our CLI.
```ts
import packageJson from "./package.json"
import packageJsonPath from "./package.json" with {type: "file"}
// We do not expect these to be equal
packageJson === packageJsonPath
```
- We can not customize the app icon used for Windows `.exe` builds
without decompiling the binary. For now we will leave the default but
one workaround is to [use tools like
ResourceHacker](698d9c4bd1)
to decompile the binary first.
---------
Co-authored-by: Jordan Pittman <jordan@cryptica.me>
Co-authored-by: Robin Malfait <malfait.robin@gmail.com>
In #14221 we added a new export to the `tailwindcss` package:
`tailwindcss/defaultTheme`. This is build on top of the full config from
V3 and will allow plugins to keep being compatible.
However, spreading in from this package has overwritten the bare value
callback handler. This PR fixes it by sharing the bare value callbacks
with the compat config.
This PR fixes support for "fallback" values for declarations in plugins.
A plugin using `addUtilities`, `matchUtilities`, `addComponents`, etc…
should be able to specify "fallback" values for declarations by passing
an array as the value of a declaration however this does not currently
work in v4 (but it does in v3):
```js
export default {
plugins: [
function ({ addUtilities }) {
addUtilities({
'.outlined': {
outline: ['1px solid ButtonText', '1px auto -webkit-focus-ring-color'],
},
})
},
],
};
```
After this PR the candidate `outlined` will now produce the following
CSS — like it does in v3:
```css
.outlined {
outline: 1px solid ButtonText;
outline: 1px auto -webkit-focus-ring-color;
}
```
While working on #14257, we noticed two issues with the CSS `theme()`
function:
1. In V3 it's possible to set arrays inside the theme object. An example
for this is the default font families as defined here:
https://github.com/tailwindlabs/tailwindcss/blob/main/stubs/config.full.js#L303-L311.
We now properly join these arrays that are not tuples.
2. We noticed that in the case where there are no modifiers, the
fallback values for the CSS `theme()` function had the first word
removed. A regression test for this was added.
We noticed that when the `defaultTheme` (change for this is coming in
#14257) defines a tuple that is also defined in the CSS theme, the
values are incorrectly merged as objects instead of overwritten.
However, CSS theme values should take precedence, even when they use
tuple syntax.
Proper coverage of this will come once `#14257` is merged when calling
`theme(fontSize.xs[1].lineHeight)` will also have a default value passed
in from the `defaultTheme`.
Closes#14253
Since we changed the export strategy for the postcss client in #14132,
we accidentally no longer generated type exports for this package.
This PR adds a type export back. We now use a similar pattern to the
`./colors` and `./defaultTheme` exports in the tailwindcss package where
we have a separate cjs entrypoint.
The changes were validated manually in a playground project that were
installing the updated dependencies from tarballs.
Here is one example of it working as expected:
<img width="750" alt="Screenshot 2024-08-26 at 14 10 07"
src="https://github.com/user-attachments/assets/83de15f2-1543-4805-9231-9b8df1636c5e">