webpack.dev.js

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

const htmlWebpackPlugin = new HtmlWebpackPlugin({
  template: path.join(__dirname, 'examples/index.html'),
  filename: './index.html',
});
const { styles } = require('@ckeditor/ckeditor5-dev-utils');

module.exports = {
  entry: {
    index: ['babel-polyfill', path.join(__dirname, 'examples/index.jsx')],
  },
  output: {
    path: path.resolve(__dirname, 'dist'),
  },

  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        use: 'babel-loader',
        exclude: /node_modules/,
      },
      {
        // Or /ckeditor5-[^/]+\/theme\/icons\/[^/]+\.svg$/ if you want to limit this loader
        // to CKEditor 5 icons only.
        test: /\.svg$/,
        use: ['raw-loader'],
      },
      {
        // Or /ckeditor5-[^/]+\/theme\/[^/]+\.css$/ if you want to limit this loader
        // to CKEditor 5 theme only.
        test: /\.css$/,
        use: [
          {
            loader: 'style-loader',
            options: {
              singleton: true,
            },
          },
          {
            loader: 'postcss-loader',
            options: styles.getPostCssConfig({
              themeImporter: {
                themePath: require.resolve('@ckeditor/ckeditor5-theme-lark'),
              },
              minify: true,
            }),
          },
        ],
      },
    ],
  },
  plugins: [htmlWebpackPlugin],
  resolve: {
    extensions: ['.js', '.jsx'],
  },
  devServer: {
    port: 3030,
  },
  // Useful for debugging.
  devtool: 'source-map',

  // By default webpack logs warnings if the bundle is bigger than 200kb.
  performance: {
    hints: false,
  },
};