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postcss-lab-function
Advanced tools
Readme
PostCSS Lab Function lets you use lab
and lch
color functions in
CSS, following the CSS Color specification.
.color-lab {
color: lab(40% 56.6 39);
}
.color-lch {
color: lch(40% 68.735435 34.568626);
}
/* becomes */
.color {
color: rgb(179, 35, 35);
color: color(display-p3 0.64331 0.19245 0.16771);
}
.color-lch {
color: rgb(179, 35, 35);
color: color(display-p3 0.64331 0.19245 0.16771);
}
Add PostCSS Lab Function to your project:
npm install postcss postcss-lab-function --save-dev
Use it as a PostCSS plugin:
const postcss = require('postcss');
const postcssLabFunction = require('postcss-lab-function');
postcss([
postcssLabFunction(/* pluginOptions */)
]).process(YOUR_CSS /*, processOptions */);
PostCSS Lab Function runs in all Node environments, with special instructions for:
Node | PostCSS CLI | Webpack | Gulp | Grunt |
---|
The preserve
option determines whether the original functional color notation
is preserved. By default, it is not preserved.
postcssLabFunction({ preserve: true })
.color {
color: lab(40% 56.6 39);
}
/* becomes */
.color {
color: rgb(179, 35, 35);
color: color(display-p3 0.64331 0.19245 0.16771);
color: lab(40% 56.6 39);
}
The enableProgressiveCustomProperties
option determines whether the original notation
is wrapped with @supports
when used in Custom Properties. By default, it is enabled.
[!NOTE] We only recommend disabling this when you set
preserve
tofalse
or if you bring your own fix for Custom Properties.
See what the plugin does in its README.
postcssLabFunction({ enableProgressiveCustomProperties: false })
:root {
--firebrick: lab(40% 56.6 39);
}
/* becomes */
:root {
--firebrick: rgb(178, 34, 34); /* will never be used, not even in older browser */
--firebrick: color(display-p3 0.64331 0.19245 0.16771); /* will never be used, not even in older browser */
--firebrick: lab(40% 56.6 39);
}
The subFeatures.displayP3
option determines if color(display-p3 ...)
is used as a fallback.
By default, it is enabled.
display-p3
can display wider gamut colors than rgb
on some devices.
postcssOKLabFunction({
subFeatures: {
displayP3: false
}
})
.color {
color: lab(40% 56.6 39);
}
/* becomes */
.color {
color: rgb(179, 35, 35);
color: lab(40% 56.6 39);
}
This software or document includes material copied from or derived from https://github.com/w3c/csswg-drafts/tree/main/css-color-4. Copyright © 2022 W3C® (MIT, ERCIM, Keio, Beihang).
FAQs
Use lab() and lch() color functions in CSS
The npm package postcss-lab-function receives a total of 5,612,133 weekly downloads. As such, postcss-lab-function popularity was classified as popular.
We found that postcss-lab-function demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 3 open source maintainers collaborating on the project.
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