Bootstrap - Sidebar collapsable and fixed

Question

I just followed this:

http://bootply.com/109746#

But I want to add affix to the sidebar for staying on place while scrolling on smartphone. I don't want the affix on big devices.

Answer 1

Add in position: fixed;top: 48px; in .nav ul tag but it must be add where mobile detect.

DEMO bootply re-size window and check.