No description
bf179916bf
Imagine the following setup:
```css
/* src/input.css */
@import "tailwindcss";
@config "../tailwind.config.ts";
@theme {
--color-red-500: #ef4444;
}
```
```ts
/* tailwind.config.ts */
export default {
theme: {
colors: {
red: {
600: '#dc2626'
}
},
extend: {
colors: {
400: '#f87171'
}
}
}
}
```
Since the theme object in the JS config contains `colors` in the
non-`extends` block, you would expect this to _not pull in all the
default colors imported via `@import "tailwindcss";`_. This, however,
wasn't the case right now since all theme options were purely _additive_
to the CSS.
This PR makes it so that non-`extend` theme keys _overwrite default CSS
theme values_. The emphasis is on `default` here since you still want to
be able to overwrite your options via `@theme {}` in user space.
This now generates the same CSS that our upgrade codemods would also
generate as this would apply the new CSS right after the `@import
"tailwindcss";` rule resulting in:
```css
@import "tailwindcss";
@theme {
--color-*: initial;
--color-red-400: #f87171;
--color-red-600: #dc2626;
}
@theme {
--color-red-500: #ef4444;
}
```
## Keyframes
This PR also adds a new core API to unset keyframes the same way. We
previously had no option of doing that but while working on the above
codemods we noticed that keyframes should behave the same way:
```css
@import "tailwindcss";
@theme {
--keyframes-*: initial;
@keyframes spin {
to {
transform: rotate(361deg);
}
}
}
```
To do this, the keyframes bookeeping was moved from the main Tailwind
CSS v4 file into the `Theme` class.
_I’m not sure super of the API yet but we would need a way for the
codemods to behave the same as out interop layer here. Option B is that
we don't reset keyframes the same way we reset other theme variables_.
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