what is webpack in create react app code example

Example 1: reactjs and webpack tutorial

npm i webpack webpack-cli --save-dev

Example 2: architecture creation for a react webpack app

...
module.exports = {
  ...
  module: {
    rules: [

      // First Rule
      {
        test: /\.(js)$/,
        exclude: /node_modules/,
        use: ['babel-loader']
      },

      // Second Rule
      {
        test: /\.css$/,
        use: [
          {
            loader: 'style-loader'
          },
          {
            loader: 'css-loader',
            options: {
              modules: true,
              localsConvention: 'camelCase',
              sourceMap: true
            }
          }
        ]
      }
    ]
  },
};