Hi, I've followed the steps directed in Wix.com's official video, "How to Create a Frozen Header That Changes as Visitors Scroll."
It works perfectly in Preview mode -- I have one header strip that appears at first, and a second header strip that replaces it when you scroll down.
But the effect doesn't work on the live site at all. I'm seeing comments on Youtube all for this same issue, so clearly something is missing.
Is there additional coding I need to add? Or an alternate solution to try?