webpack.config.js

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

module.exports = {
  entry: [
    // entry point of our app
    "./client/index.js",
  ],
  output: {
    path: path.resolve(__dirname, "dist"),
    publicPath: "/",
    filename: "bundle.js",
  },
  devtool: "eval-source-map",
  mode: "development",
  devServer: {
    host: "localhost",
    port: 8080,
    // enable HMR on the devServer
    hot: true,
    // fallback to root for other urls
    historyApiFallback: {
      index: "./dist/index.html",
    },

    static: {
      // match the output path
      directory: path.resolve(__dirname, "dist"),
      // match the output 'publicPath'
      publicPath: "/dist/",
    },

    headers: { "Access-Control-Allow-Origin": "*" },
    /**
     * proxy is required in order to make api calls to
     * express server while using hot-reload webpack server
     * routes api fetch requests from localhost:8080/api/* (webpack dev server)
     * to localhost:3000/api/* (where our Express server is running)
     */
    proxy: {
      "/": {
        target: "http://localhost:3000/",
        secure: false,
      },
    },
  },
  module: {
    rules: [
      {
        test: /.(js|jsx)$/,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader",
        },
      },
      {
        test: /.(css|scss)$/,
        exclude: /node_modules/,
        use: ["style-loader", "css-loader"],
      },
    ],
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: "./client/index.html",
    }),
  ],
  resolve: {
    // Enable importing JS / JSX files without specifying their extension
    extensions: [".js", ".jsx"],
  },
};