We want the user to view, edit and add <script> tags but not be able to execute them on preview.

It could lead to some situations like:

How to reproduce?

Navigate to: https://alex-d.github.io/Trumbowyg/demos/

• Switch to source-formatting and insert: <script>var dteNow = new Date(); var intYear = dteNow.getFullYear(); document.write(intYear);</script>
• Switch back to preview