Intro to Webpack for React Settings

reactwebpack.md

webpack.config.json

const path = require("path")
const HtmlWebpackPlugin = require("html-webpack-plugin");
const { CleanWebpackPlugin } = require("clean-webpack-plugin");

const config = {
    mode: process.env.NODE_ENV ? process.env.NODE_ENV : "development",
    module: {
        rules: [
            {
              test: /\.m?(js|jsx)$/,
              exclude: /(node_modules|bower_components)/,
              use: {
                loader: "babel-loader",
                options: {
                  presets: ["@babel/preset-env", "@babel/preset-react"],
                  plugins: [
                    ["@babel/plugin-proposal-class-properties", { loose: true }],
                    "@babel/plugin-transform-runtime",
                  ],
                },
              },
            },
            {
              test: /\.s[ac]ss$/i,
              use: ["style-loader", "css-loader", "sass-loader"],
            },
            {
              test: /\.css$/i,
              use: ["style-loader", "css-loader"],
            },
          ],
    },
    plugins: [
        new CleanWebpackPlugin(),
        new HtmlWebpackPlugin({
          title: "My React Project",
          template: "./src/index.html",
        }),
      ],
      output: {
        filename: "[name].bundle.js",
        path: path.resolve(__dirname, "build"),
      },
      optimization: {
        splitChunks: {
          chunks: "all",
        },
      },
}

module.exports = (env) => {
    return config
}

package.json

{
  "name": "webpackreact",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "webpack": "webpack",
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "react": "^17.0.2",
    "react-dom": "^17.0.2",
    "webpack": "^5.33.2"
  },
  "devDependencies": {
    "@babel/plugin-proposal-class-properties": "^7.13.0",
    "@babel/plugin-transform-runtime": "^7.13.15",
    "@babel/preset-env": "^7.13.15",
    "@babel/preset-react": "^7.13.13",
    "babel": "^6.23.0",
    "babel-loader": "^8.2.2",
    "clean-webpack-plugin": "^4.0.0-alpha.0",
    "css-loader": "^5.2.3",
    "html-webpack-plugin": "^5.3.1",
    "sass-loader": "^11.0.1",
    "style-loader": "^2.0.0",
    "webpack-cli": "^4.6.0"
  }
}