I like the look of UIKit so I created a few things to explore the basic components and default animations. Here’s a UIKit based demo page that is self-contained for quick prototyping. https://stephaniejagiello.com/lab/uikit_themed.html https://stephaniejagiello.com/lab/uikit_themed.html
I like this timeline editor in Dora. It just maps to previous moton editors. Also, the viewport is a visible object that you can move. And, responsive views are selectable as device specific. That's interesting.