Board Thread:Support Requests - Designing Your Wiki/@comment-3499588-20180702002216/@comment-9605025-20180702015821

According to this section of the instructions, you need to import custom.js as well. If you look at the Nintendo Wiki's Common.js, you will see that they do import that script as well. - Edit:

Of course, you should probably do it using ImportJS like you already did for the other script.