No description
60b0da90ce
This PR further improves the `color-mix(…)` polyfill to create a
reasonable fallback if dynamic values that can not statically be
resolved are used. This refers to either the use of `currentcolor` or
any variables that are not static theme variables.
Here are two examples that now generate a reasonable fallback instead of
not showing any color at all:
```css
.text-\\(--my-color\\)\\/\\(--my-opacity\\) {
color: var(--my-color);
}
@supports (color: color-mix(in lab, red, red)) {
.text-\\(--my-color\\)\\/\\(--my-opacity\\) {
color: color-mix(in oklab, var(--my-color) var(--my-opacity), transparent);
}
}
```
```css
.text-current\\/50 {
color: currentColor;
}
@supports (color: color-mix(in lab, red, red)) {
.text-current\\/50 {
color: color-mix(in oklab, currentColor 50%, transparent);
}
}
```
## Test plan
- Made sure the test diffs are looking reasonable
- Tested this on a production site with `<p className="text-shadow-lg/50
[--my-color:red] text-shadow-(color:--my-color)">shadow test</p>`
- Browsers that do not support `color-mix(…)` will properly show a red
shadow now albeit with 100% opacity: iOS 15.5 and Chrome 110
- Browsers that I have tested to make sure it still works there with
opacity: Firefox 127, Firefox 128, Latest Chrome, Safari, Firefox
- Browsers that do show a black shadow because of `var(…)var(…)` being
chained with no space by lightningcss: Chrome 111
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