Inline and Minify CSS

optimizing-and-managing-a-chrome-extension-with-webpack-5.js

// ...
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const StyleExtHtmlWebpackPlugin = require('style-ext-html-webpack-plugin');
// ...

const config = {
  // ...
  plugins: [
    new StyleExtHtmlWebpackPlugin({
      minify: isDevelopment === false,
    }),
    new ExtractTextPlugin('[name].css'),
    // ...
  ],
};