Thread:CrashBash/@comment-35876453-20190111105141/@comment-4864110-20190112204553

Freighttrain, The wrote: @Battleshipman: Have you had a look at the source HTML of that navbox and do you know different ways of implementing collapsibility for navboxes? I don't know much of implementing collapsibility for navboxes. I just created them for easy and comprehensive ways to get to similar articles. But I may have a solution.

There is a wiki of Batman: Arkham games called Arkham wiki. It has templates that have implement collapsibility, including this one here. I hope that should help you with the source HTML for navboxes.