How are they doing this?

[auburnwww]

Check out this page on the Washington Post site about Notre Dame. (https://www.washingtonpost.com/graphics/2020/entertainment/notre-dame-history/) Scroll down a good bit to actually see the animated parts showing the evolution of the cathedral over time and the 3D animation as they turn and rotate the architectural plans of the building, all tied to the scrolling and the associated text content. Sure, it's HTML5, but does anyone have any idea how that was built? What tools could you use to build it? If you wanted to build something like it, where would you start? Dreamweaver? Animate? Anything else?

[Nancy OShea]

The Washington Post has resources to hire teams of programmers.  Do a Google search for Scroll-based Animations or AOS (animation on scroll).  There are numerous ways to do it with CSS3, JQuery, plain vanilla JavaScript and code libraries like Vue.js and others.