<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<!------ Include the above in your HEAD tag ---------->
<div class="col-md-10 offset-md-1 py-5">
<textarea id="editor"></textarea>
</div>
<script src="https://cdn.ckeditor.com/ckeditor5/34.0.0/classic/ckeditor.js"></script>
<script>
ClassicEditor
.create( document.querySelector( '#editor' ), {
toolbar: [ 'heading', '|', 'bold', 'italic', 'link', 'bulletedList', 'numberedList', 'blockQuote', 'insertTable', 'insertImage' ],
heading: {
options: [
{ model: 'paragraph', title: 'Paragraph', class: 'ck-heading_paragraph' },
{ model: 'heading1', view: 'h1', title: 'Heading 1', class: 'ck-heading_heading1' },
{ model: 'heading2', view: 'h2', title: 'Heading 2', class: 'ck-heading_heading2' },
{ model: 'heading3', view: 'h3', title: 'Heading 3', class: 'ck-heading_heading3' }
]
}
} )
</script>
#editor{
min-height: 200px;
}