Example webpack autoprefixer from https://github.com/postcss/autoprefixer Raw

webpack_autoprefixer.js

// webpack.config.js
module.exports = {
    module: {
        rules: [
            {
                test: /\.css$/,
                use: ["style-loader", "css-loader", "postcss-loader"]
            }
        ]
    }
}

// postcss.config.js
module.exports = {
  plugins: [
    require('autoprefixer')
  ]
}