webpack.config.js

/* eslint-disable */

const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const HtmlWebpackInlineSourcePlugin = require('html-webpack-inline-source-plugin');
const OptimizeCssAssetsPlugin = require('optimize-css-assets-webpack-plugin');

const isProduction = process.env.npm_lifecycle_event === 'build';

module.exports = {
  entry: './src',
  devtool: !isProduction && 'source-map',
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [
          MiniCssExtractPlugin.loader,
          {
            loader: 'css-loader'
          }
        ]
      }
    ]
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: 'src/index.html',
      minify: isProduction && {
        collapseWhitespace: true
      },
      inlineSource: isProduction && '\.(js|css)$'
    }),
    new HtmlWebpackInlineSourcePlugin(),
    new OptimizeCssAssetsPlugin({}),
    new MiniCssExtractPlugin({
      filename: '[name].css'
    })
  ],
  devServer: {
    stats: 'minimal',
    overlay: true
  }
};