PostCSS Lab Function lets you use lab, lch, and gray color functions in
CSS, following the CSS Color specification.
:root {
--firebrick: lab(40 56.6 39);
--firebrick-a50: lch(40 68.8 34.5 / 50%);
--gray-40: gray(40);
--gray-40a50: gray(40 / .5);
}
/* becomes */
:root {
--firebrick: rgb(178, 34, 34);
--firebrick-a50: rgba(178, 34, 34, .5);
--gray-40: rgb(94,94,94);
--gray-40a50: rgba(94,94,94, .5);
}Add PostCSS Lab Function to your build tool:
npm install postcss-lab-function --save-devUse PostCSS Lab Function to process your CSS:
import postcssLabFunction from 'postcss-lab-function';
postcssLabFunction.process(YOUR_CSS, /* processOptions */, /* pluginOptions */);Add PostCSS to your build tool:
npm install postcss --save-devUse PostCSS Lab Function as a plugin:
import postcss from 'gulp-postcss';
import postcssLabFunction from 'postcss-lab-function';
postcss([
postcssLabFunction(/* pluginOptions */)
]).process(YOUR_CSS);Add PostCSS Loader to your build tool:
npm install postcss-loader --save-devUse PostCSS Lab Function in your Webpack configuration:
import postcssLabFunction from 'postcss-lab-function';
module.exports = {
module: {
rules: [
{
test: /\.css$/,
use: [
'style-loader',
{ loader: 'css-loader', options: { importLoaders: 1 } },
{ loader: 'postcss-loader', options: {
ident: 'postcss',
plugins: () => [
postcssLabFunction(/* pluginOptions */)
]
} }
]
}
]
}
}Add Gulp PostCSS to your build tool:
npm install gulp-postcss --save-devUse PostCSS Lab Function in your Gulpfile:
import postcss from 'gulp-postcss';
import postcssLabFunction from 'postcss-lab-function';
gulp.task('css', () => gulp.src('./src/*.css').pipe(
postcss([
postcssLabFunction(/* pluginOptions */)
])
).pipe(
gulp.dest('.')
));Add Grunt PostCSS to your build tool:
npm install grunt-postcss --save-devUse PostCSS Lab Function in your Gruntfile:
import postcssLabFunction from 'postcss-lab-function';
grunt.loadNpmTasks('grunt-postcss');
grunt.initConfig({
postcss: {
options: {
use: [
postcssLabFunction(/* pluginOptions */)
]
},
dist: {
src: '*.css'
}
}
});The preserve option determines whether the original functional color notation
is preserved. By default, it is not preserved.
postcssImageSetFunction({ preserve: true }):root {
--firebrick: lab(40 56.6 39);
--firebrick-a50: lch(40 68.8 34.5 / 50%);
}
/* becomes */
:root {
--firebrick: rgb(178, 34, 34);
--firebrick: lab(40 56.6 39);
--firebrick-a50: rgba(178, 34, 34, .5);
--firebrick-a50: lch(40 68.8 34.5 / 50%);
}