This is a very handy tip if you’re adding view transitions to your website!
Some great ideas for view transitionts in here! Also:
If you look at any of the examples on a browser that does not support them, the pages still function just fine. The transitions are an extra that’s layered on top if and when your browser supports them. Another concrete example of progressive enhancement in practice.
At first glance, this looks like a terrible idea. But the key is in the implementation. In this case, the implementation is truly awful.
The section on detecting “auto dark theme” is, as far as I can tell, not intended as a joke.
Mind you, this could all be a galaxy-brain idea to encourage more developers to provide their own dark mode styles. (In much the same way that AMP was supposed to encourage better performance.)