Did you ever get this working without building it all out from scratch? I have the same issue, my announcement bar was showing and now it's not. I tried to move the position so that the announcement bar was displayed below the header menu. This didn'...

Hi Everyone. I've built out a sticky add to cart bar following a couple of different tutorials online to get the functionality we're after. I'm happy with it now but unfortunately the quantity selector doesn't change the quantity that gets added to c...

Thanks so much for finding this mate, exactly what we needed

Hi any update on this? Looking for the same functionality as the OP

This worked for me too thanks!