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'
        }
    }
});