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!