How do I design a webpage with a scrolling side nav?

[samliew (webflowexpert.com)]

You’ll need custom CSS to display: sticky the sidebar, as Webflow does not support display: sticky.

Sticky area - Is this feature natively available?

Hello, I just saw this webflow page. I’m starting a project, which will use this function (sticky). I was thinking of doing it manually in the code, because I did not find this option. The best way would be to do manually or there is this function and I did not find it? Thank you.

Unless you mean scrolling for the items within the sidebar itself, as it is longer than the screen height, in that case you’ll need custom CSS to overflow-y: auto, as Webflow does not support overflow property of a single axis.