title: Getting ClassicEditor exported on custom build of CKEditor 5
body: <p>I am trying to build CKEditor 5 using "Scenario 2" as described here: </p>
  
  <p><a href="https://docs.ckeditor.com/ckeditor5/latest/builds/guides/integration/advanced-setup.html" rel="nofollow noreferrer">https://docs.ckeditor.com/ckeditor5/latest/builds/guides/integration/advanced-setup.html</a></p>
  
  <p>And it is almost working. in my <code>app.js</code> which get compiled together with the editor by webpack I can reference <code>ClassicEditor.create</code> and thus create a new editor :)</p>
  
  <p>But <code>ClassicEditor</code> don't get exported, so any external javascript which is not compiled by Webpack can't reference <code>ClassicEditor</code> (I just get "ReferenceError: ClassicEditor is not defined").</p>
  
  <p>So how do I get <code>ClassicEditor</code> exported? </p>
  
  <p>Here are the files I use:</p>
  
  <pre><code>app.js:
  import ClassicEditorBase from '@ckeditor/ckeditor5-editor-classic/src/classiceditor';
  import EssentialsPlugin from '@ckeditor/ckeditor5-essentials/src/essentials';
  import UploadadapterPlugin from '@ckeditor/ckeditor5-adapter-ckfinder/src/uploadadapter';
  import AutoformatPlugin from '@ckeditor/ckeditor5-autoformat/src/autoformat';
  import BoldPlugin from '@ckeditor/ckeditor5-basic-styles/src/bold';
  import ItalicPlugin from '@ckeditor/ckeditor5-basic-styles/src/italic';
  import BlockquotePlugin from '@ckeditor/ckeditor5-block-quote/src/blockquote';
  import EasyimagePlugin from '@ckeditor/ckeditor5-easy-image/src/easyimage';
  import HeadingPlugin from '@ckeditor/ckeditor5-heading/src/heading';
  import ImagePlugin from '@ckeditor/ckeditor5-image/src/image';
  import ImagecaptionPlugin from '@ckeditor/ckeditor5-image/src/imagecaption';
  import ImagestylePlugin from '@ckeditor/ckeditor5-image/src/imagestyle';
  import ImagetoolbarPlugin from '@ckeditor/ckeditor5-image/src/imagetoolbar';
  import ImageuploadPlugin from '@ckeditor/ckeditor5-image/src/imageupload';
  import LinkPlugin from '@ckeditor/ckeditor5-link/src/link';
  import ListPlugin from '@ckeditor/ckeditor5-list/src/list';
  import ParagraphPlugin from '@ckeditor/ckeditor5-paragraph/src/paragraph';
  
  export default class ClassicEditor extends ClassicEditorBase {}
  
  ClassicEditor.build = {
      plugins: [
          EssentialsPlugin,
          UploadadapterPlugin,
          AutoformatPlugin,
          BoldPlugin,
          ItalicPlugin,
          BlockquotePlugin,
          EasyimagePlugin,
          HeadingPlugin,
          ImagePlugin,
          ImagecaptionPlugin,
          ImagestylePlugin,
          ImagetoolbarPlugin,
          ImageuploadPlugin,
          LinkPlugin,
          ListPlugin,
          ParagraphPlugin
      ],
      config: {
          toolbar: {
              items: [
                  'heading',
                  '|',
                  'bold',
                  'italic',
                  'link',
                  'bulletedList',
                  'numberedList',
                  'imageUpload',
                  'blockQuote',
                  'undo',
                  'redo'
              ]
          },
          image: {
              toolbar: [
                  'imageStyle:full',
                  'imageStyle:side',
                  '|',
                  'imageTextAlternative'
              ]
          },
          language: 'en'
      }
  };
  </code></pre>
  
  <p>webpack.config.js:</p>
  
  <pre><code>// webpack.config.js
  
  'use strict';
  
  const path = require( 'path' );
  const { styles } = require( '@ckeditor/ckeditor5-dev-utils' );
  
  module.exports = {
      // https://webpack.js.org/configuration/entry-context/
      entry: './app.js',
  
      // https://webpack.js.org/configuration/output/
      output: {
          path: path.resolve( __dirname, 'dist' ),
          filename: 'bundle.js'
      },
  
      module: {
          rules: [
              {
                  // 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
                          } )
                      },
                  ]
              }
          ]
      },
  
      // Useful for debugging.
      devtool: 'source-map'
  };
  </code></pre>