On one of the wix pages (link above), as you scroll down on the right hand side there is a box that starts scrolling when the header touches it then goes all the way down as you keep scrolling till it gets to a line.
This element is not pinned.
How would you do this on your own site??
Specifically how would I do this on my site...
The element I'm trying to make do this is the "featured" box on the right hand side of my website