How to make X scrollbar on top and bottom?

Hi man!

Tried to make a X scrollbar on top and bottom, but failed (( I can make a clone of the bottom scorlbar, but it does not work, I can not bind events.

Help me please!

P.S. Sry for my English.

No file, test, or entry point is named; first clarify whether this is a requested library feature or a usage question, and define the expected top-and-bottom scrollbar behavior. Then locate the scrollbar and event-handling implementation and add a focused test or reproduction showing that both scrollbars stay synchronized.

Written by the indexing model from the issue text.