Are you ready to turbocharge your Stylus setup? Welcome to the world of PostStylus! This PostCSS adapter for Stylus allows you to integrate any PostCSS plugin with ease and perform custom post-processing on your Stylus output. Think of PostStylus as a magical bridge, connecting the robust functionalities of PostCSS to the elegance of Stylus.

Contents

• Install
• Usage
• Passing Arguments to Plugins
• Custom Processing
• Warning Handler
• Asynchronous Processing

Installation

Getting started with PostStylus is simple. Just run the following command to install it as a development dependency:

npm install --save-dev poststylus

Usage

Let’s see how to use PostStylus as a regular Stylus plugin. You can pass it an array of PostCSS plugins installed in your project.

const stylus = require('stylus');
const poststylus = require('poststylus');
const autoprefixer = require('autoprefixer');
const rucksack = require('rucksack-css');

stylus(css).use(poststylus([autoprefixer, rucksack]));

Using PostStylus with Gulp

Integrating PostStylus into your Gulp tasks is surprisingly easy:

const gulp = require('gulp');
const stylus = require('gulp-stylus');
const poststylus = require('poststylus');
const autoprefixer = require('autoprefixer');
const rucksack = require('rucksack-css');

gulp.task('stylus', function () {
  return gulp.src('style.styl')
    .pipe(stylus({
      use: [poststylus([autoprefixer, rucksack])]
    }))
    .pipe(gulp.dest('.'));
});

gulp.task('default', ['stylus']);

Using PostStylus with Grunt

For Grunt users, wrap PostStylus in a function before using:

const postcss = function() {
  return require('poststylus')([autoprefixer, rucksack-css]);
};

module.exports = function(grunt) {
  grunt.initConfig({
    stylus: {
      compile: {
        options: {
          use: [postcss]
        },
        files: {
          'style.css': 'style.styl'
        }
      }
    }
  });
  grunt.loadNpmTasks('grunt-contrib-stylus');
};

Using PostStylus with Webpack

If you’re working with Webpack, here’s how to incorporate PostStylus:

const poststylus = require('poststylus');

module: {
  loaders: [
    {
      test: /\.styl$/,
      loader: 'style-loader!css-loader!stylus-loader'
    }
  ]
},
stylus: {
  use: [poststylus([autoprefixer, rucksack-css])]
};

Using PostStylus from the Command Line

To run PostStylus from the Stylus CLI, use:

stylus --use ./node_modules/poststylus --with [autoprefixer] --out test.css test.styl

Passing Arguments to Plugins

Sometimes you need to customize the behavior of your PostCSS plugins. In this case, you can pass arguments like this:

const autoprefixer = require('autoprefixer');

stylus(css).use([poststylus([autoprefixer({ browsers: ['ie 8'] })])]);

Custom Processing

Want to perform advanced processing? You can create a custom PostCSS plugin:

const myPostcss = postcss.plugin('custom', function() {
  return function (css) {
    // PostCSS processing here
  };
});

stylus(css).use(poststylus([myPostcss()]));

Warning Handler

If any of your PostCSS plugins generate warnings, they will be logged using console.error by default. To customize this behavior, provide a function as a second argument to PostStylus:

stylus(css).use(poststylus([autoprefixer, rucksack-css], function(message) {
  console.info(message);
}));

Asynchronous Processing

Currently, PostStylus does not support asynchronous PostCSS processing due to a bug in the Stylus end event. Keep an eye on the respective GitHub issues for updates!

Troubleshooting

If you run into issues with your PostStylus setup, consider the following:

• Ensure all required plugins are installed and correctly referenced in your configuration.
• Check your Node.js and npm versions, as compatibility can sometimes be a factor.
• If you’re running commands from the CLI, make sure the paths to your plugins are correct.

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