Recently I struggled with debugging a custom property code. I usually check Console in chrome developer tool to see if I missed something but there was nothing in there at all! I tried to debug Dojo and Episerver JS code to find out what a problem and all JS is minified! To resolve this you can add:
<clientResources debug="true" />
to “web.config” -> “episerver.framework” section! With that all “warnings” from dojo and episerver will be shown to you and JS is not minified! Hope it can save someone else time! Just remember to remove this item on your live site!