XF 2.0 floating sidebar

[brattanek]

Hi,

I make custom sidebar but i would like add follow during scrolling like notice floating, how use function from xf?
I whant void adding new jQuery.

css add to extra.less
html add to PAGE_CONTAINER

code:

sidebar xbox

...

codepen.io

demo:
https://xboxforum.pl/


edit:
I make solution

sidebar xbox scroll

...

codepen.io