webpack.postcss.config.example.js

var precss       = require('precss');
var autoprefixer = require('autoprefixer');
var sorting = require('postcss-sorting'); // !

module.exports = {
    module: {
        loaders: [
            {
                test:   /\.css$/,
                loader: "style-loader!css-loader!postcss-loader"
            }
        ]
    },
    postcss: function () {
        return [precss, autoprefixer, sorting]; // !
    }
}