@Ali-Hussain I'm doing something similar to this but with the borders. It would be easy to adapt this so that it sets the background instead.
It's essentially jQuery doing the legwork, but works perfectly.
I am new to nodebb and this is my first open source community. I have been playing with nodebb for about a month or so writing plugins/widgets and themes. In my plugin I have a migration script that runs and pre populates a number of categories/topics. While developing this feature I noticed that a number of category permissions are left in the database even though the category has been purged. Is this a bug? Is this intended, why would I want permissions to something that no longer exists?
Thanks for your help, keep up the great work!