When using an opacity modifier such as `bg-black/[var(--opacity)]`, then
this was translated to:
```css
.bg-black\/\[var\(--opacity\)\] {
background-color: color-mix( in oklch, var(--color-black, #000) calc(var(--opacity) * 100%), transp
}
```
The issue is that this part: `calc(var(--opacity) * 100%)` is invalid
_if_ the `var(--opacity)` already contains a percentage value. See:
https://play.tailwindcss.com/xz0t
This is because this eventually resolves to `calc(20% * 100%)` and `20%
100%` is invalid in CSS.
In Catalyst we use variables like that _with_ the `%` included, which
means that v4 doesn't work as expected when using this.
A variable with a `%` included is probably the better value to support
compared to the the unit less one. This also allows you to define your
variables using `@property` as a proper `<percentage>` type.
Unfortunately the `var(--opacity)` is a value that can change at
runtime, so we don't know the type at compile time.
In the future we might be able to use `first-valid(…)` (see:
https://drafts.csswg.org/css-values-5/#f and generate both versions at
the same time.
---------
Co-authored-by: Adam Wathan <adam.wathan@gmail.com>
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| @tailwindcss-cli | ||
| @tailwindcss-node | ||
| @tailwindcss-postcss | ||
| @tailwindcss-standalone | ||
| @tailwindcss-upgrade | ||
| @tailwindcss-vite | ||
| internal-example-plugin | ||
| tailwindcss | ||
| tsconfig.base.json | ||