Webpack Config For Code Splitting

webpack.config.js

const path = require("path");
const webpack = require("webpack");
const HTMLGen = require("html-webpack-plugin");

module.exports = {
  mode: "development",
  entry: "./src/index.js",
  output: {
    path: path.resolve(__dirname, "dist"),
    filename: "[name].bundle.js",
    chunkFilename: "[name].bundle.js",
    publicPath: "/"
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        use: ["babel-loader"]
      },
      {
        test: /\.(css|scss)$/,
        use: ["style-loader", "css-loader", "sass-loader"]
      }
    ]
  },
  resolve: {
    extensions: ["*", ".js", ".jsx"]
  },
  devServer: {
    contentBase: "./dist",
    hot: true,
    historyApiFallback: true,
    stats: "errors-only"
  },
  plugins: [
    new HTMLGen({
      title: "React BoilerPlate",
      template: "index.html"
    }),
    new webpack.HotModuleReplacementPlugin()
  ]
};