Installing PostCSS HWB Function

PostCSS HWB Function runs in all Node environments, with special instructions for:

Node	PostCSS CLI	Webpack	Create React App	Gulp	Grunt

Node

Add PostCSS HWB Function to your project:

npm install postcss @csstools/postcss-hwb-function --save-dev

Use it as a PostCSS plugin:

const postcss = require('postcss');
const postcssHWBFunction = require('@csstools/postcss-hwb-function');

postcss([
	postcssHWBFunction(/* pluginOptions */)
]).process(YOUR_CSS /*, processOptions */);

PostCSS CLI

Add PostCSS CLI to your project:

npm install postcss-cli @csstools/postcss-hwb-function --save-dev

Use PostCSS HWB Function in your postcss.config.js configuration file:

const postcssHWBFunction = require('@csstools/postcss-hwb-function');

module.exports = {
	plugins: [
		postcssHWBFunction(/* pluginOptions */)
	]
}

Webpack

Webpack version 5

Add PostCSS Loader to your project:

npm install postcss-loader @csstools/postcss-hwb-function --save-dev

Use PostCSS HWB Function in your Webpack configuration:

module.exports = {
	module: {
		rules: [
			{
				test: /\.css$/i,
				use: [
					"style-loader",
					{
						loader: "css-loader",
						options: { importLoaders: 1 },
					},
					{
						loader: "postcss-loader",
						options: {
							postcssOptions: {
								plugins: [
									[
										"@csstools/postcss-hwb-function",
										{
											// Options
										},
									],
								],
							},
						},
					},
				],
			},
		],
	},
};

Create React App

Add React App Rewired and React App Rewire PostCSS to your project:

npm install react-app-rewired react-app-rewire-postcss @csstools/postcss-hwb-function --save-dev

Use React App Rewire PostCSS and PostCSS HWB Function in your config-overrides.js file:

const reactAppRewirePostcss = require('react-app-rewire-postcss');
const postcssHWBFunction = require('@csstools/postcss-hwb-function');

module.exports = config => reactAppRewirePostcss(config, {
	plugins: () => [
		postcssHWBFunction(/* pluginOptions */)
	]
});

Gulp

Add Gulp PostCSS to your project:

npm install gulp-postcss @csstools/postcss-hwb-function --save-dev

Use PostCSS HWB Function in your Gulpfile:

const postcss = require('gulp-postcss');
const postcssHWBFunction = require('@csstools/postcss-hwb-function');

gulp.task('css', function () {
	var plugins = [
		postcssHWBFunction(/* pluginOptions */)
	];

	return gulp.src('./src/*.css')
		.pipe(postcss(plugins))
		.pipe(gulp.dest('.'));
});

Grunt

Add Grunt PostCSS to your project:

npm install grunt-postcss @csstools/postcss-hwb-function --save-dev

Use PostCSS HWB Function in your Gruntfile:

const postcssHWBFunction = require('@csstools/postcss-hwb-function');

grunt.loadNpmTasks('grunt-postcss');

grunt.initConfig({
	postcss: {
		options: {
			processors: [
			postcssHWBFunction(/* pluginOptions */)
			]
		},
		dist: {
			src: '*.css'
		}
	}
});

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