Board Thread:Support Requests - Designing Your Wiki/@comment-26454055-20200509043216/@comment-9605025-20200509165339

That is not a standard feature. Wookiepedia accomplished that using some custom JS.

If your wiki is not a UCP wiki, then you can copy their custom JS to add this feature. You should be sure to give them credit for it. For convenience, I have pasted the relevant JS below. You should contact the Wookiepedia admins if you have any questions about the script. That said, using it appears pretty straightforward.

Creating Toggle Buttons

Toggle buttons must be in cells of a table. The table must have the class "timeline-toggles". The "cateogry", as you call them, must be specified as the class of the cell. The button itself is a dummy link inside the cell. For the dummy link, Wookiepedia uses "#js". Here is an example. Creating Togglable Table Rows

Togglable rows must be in tables, obviously. There is no class that needs to be assigned to the table nor does the table need to be placed in a certain spot relative to the toggle buttons. The buttons will toggle all applicable rows on the page regardless of location. To make a row togglable by a given button, simply add the same class used for the button. Adding multiple classes will make the row togglable by multiple buttons. Here is an example.