ckEditorsCollection[target].data.model.change( writer => {
                       writer.insertText(Data.html, ckEditorsCollection[target].model.document.selection.getFirstPosition() );
                        ckEditorsCollection[target].editing.view.focus();
                    }); 
  
  npm install --save @ckeditor/ckeditor5-html-embedimport { HtmlEmbed } from '@ckeditor/ckeditor5-html-embed';
ClassicEditor
    .create( document.querySelector( '#editor' ), {
        plugins: [ HtmlEmbed, /* ... */ ],
        toolbar: [ 'htmlEmbed', /* ... */ ],
    } )
    .then( /* ... */ )
    .catch( /* ... */ );