webpack.prod.js

const webpack = require('webpack');
const merge = require('webpack-merge');
const OptimizeCssAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const common = require('./webpack.common');

module.exports = merge(common, {
    mode: 'production',
    devtool: 'none',
    output: {
        filename: '[name].[contenthash].min.js',
        chunkFilename: '[id].[contenthash].min.js',
    },
    module: {
        rules: [
            {
                test: /\.(sa|sc|c)ss$/,
                use: [
                    'style-loader',
                    MiniCssExtractPlugin.loader,
                    'css-loader',
                    'postcss-loader',
                    'sass-loader',
                ]
            }
        ]
    },
    plugins: [
        new webpack.optimize.LimitChunkCountPlugin({
            maxChunks: 1,
        }),
        new MiniCssExtractPlugin({
            filename: '[name].[contenthash].min.css',
            sourceMap: true,
        }),
    ],
    optimization: {
        minimizer: [
            new UglifyJsPlugin(),
            new OptimizeCssAssetsPlugin(),
        ],
    },
});