CKeditor 5 in Modal

<link href="path/to/grapes.min.css" rel="stylesheet"/>
<script src="path/to/grapes.min.js"></script>
<script src="ckeditor5/build/ckeditor.js"></script>
<script src="dist/grapesjs-plugin-ckeditor5.min.js"></script>

<div id="gjs"></div>

<script type="text/javascript">
  var editor = grapesjs.init({
      container : '#gjs',
      plugins: ['gjs-plugin-ckeditor5'],
      pluginsOpts: {
        'gjs-plugin-ckeditor5': {
            position: 'left',
            options: {
              trackChanges: {},
              toolbar: {
                items: [
                  'heading',
                  '|',
                  'fontColor',
                  'fontSize',
                  'fontFamily',
                  'fontBackgroundColor',
                  'alignment',
                  'bold',
                  'italic',
                  'underline',
                  'strikethrough',
                  'link',
                  'bulletedList',
                  'numberedList',
                  'horizontalLine',
                  '|',
                  'outdent',
                  'indent',
                  '|',
                  'blockQuote',
                  'insertTable',
                  '|',
                  'undo',
                  'redo'
                ]
              },
              language: 'en',
              table: {
                contentToolbar: [
                  'tableColumn',
                  'tableRow',
                  'mergeTableCells',
                  'tableCellProperties',
                  'tableProperties'
                ]
              },
              licenseKey: ''
            }
          }
      }
  });
</script>