Board Thread:New Features/@comment-44895029-20200619012840/@comment-5811199-20200619040542

Hey there - the new wiki format runs on newer, upgraded technology. Right now it's still in development, which means that things you see on the new format is still work in progress.

There's more info here, with some commonly asked questions: Help:Unified Community Platform

JavaScript is code that lets you add different functions and customisations to your wiki. Some common ones include adding a Discord widget, or help make bulk changes to a wiki.