Banner Image Slider with Text & Buttons | Squarespace 7.1 Tutorial

[UPDATED] In this tutorial, I’m going to walk through installing the code necessary to make a full-weight, full-width, sliding image banner that you can put text on top of. Squarespace 7.1 still doesn’t have the background image slider. I’ve taken the base of this code here from W3Schools and adjusted it for Squarespace 7.1.