webpack.dev.js

const path = require("path");
const webpack = require("webpack");

const HtmlWebpackPlugin = require("html-webpack-plugin");
const HtmlWebpackPluginConfig = new HtmlWebpackPlugin({
  template: "./example/index.html",
  filename: "index.html",
  inject: "body",
});

module.exports = {
  entry: "./example/app.jsx",
  mode: "development",
  output: {
    path: path.resolve("dist"),
    filename: "bundle.js",
  },
  module: {
    rules: [
      {
        loader: "babel-loader",
        test: /\.js$/,
        exclude: /node_modules/,
      },
      {
        loader: "babel-loader",
        test: /\.jsx$/,
        exclude: /node_modules/,
      },
    ],
  },
  plugins: [
    HtmlWebpackPluginConfig,
    new webpack.DefinePlugin({
      SOURCE_PATH: JSON.stringify("./docs"),
    }),
  ],
  devtool: "eval-cheap-module-source-map",
  devServer: {
    static: {
      directory: path.join(__dirname, "docs"),
      publicPath: "/docs",
    },
  },
};