This post is about configure React with webpack and babel without npx create-react-app.

Comands used in this repository

Install Dependencies

Babel and webpack modules for transpile react JSX and import export like $ syntax

$ yarn add @babel/core @babel/preset-env @babel/preset-react webpack webpack-cli -D

Install react and react dom

$ yarn add react react-dom

Loader

$ yarn add babel-loader -D

Configuration files:

Babel

Webpack

For webpack configuration we need to indicate dir locales for transpilation input and transpilation output:

const path = require('path');

module.exports = {
  entry: './src/index.js',
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'bundle.js'
  }
};

To configure loaders in webpack just add this:

// ...
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
        }
      }
    ]
  }
// ...

Each rule need some object scope rule: [{a},{b}...]. At exemple above we transpile all js modules in repo.

"scripts": {
  "build": "webpack --mode production", // minified output
  "start": "webpack --mode development",
}

Create html in bundle.js folder

In this repo I didn't use npx create-react-app in this case I will create html for transpiled script:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Tech Lists</title>
</head>
<body>
  <script src="./bundle.js"></script>
</body>
</html>

Automatic save-build script

For automate bundle use this:

$ yarn add webpack-dev-server -D

Add in webpack.config file:

// ...
devServer: {
  contentBase: resolve(__dirname, 'dist')
},

"scripts": {
  "build": "webpack --mode production",
  "start": "webpack-dev-server --mode development"
}

Add syle loader for css

$ yarn add style-loader css-loader -D

Add loader for images

$ yarn add file-loader -D

Add plugin for no use constructor in class

$ yarn add @babel/plugin-proposal-class-properties -D

Lib for debug wrong inputs

$ yarn add prop-types