Looks like a very comprehensive course about CSS.
A few nice tips for dealing with fonts on the web.
This is a good resource explaining most of what one needs to know about Cross Origin Resource Sharing (CORS). As usual in such articles, the historical bits are particularly insightful.
I recognize myself quite a bit into that: boring but pervasive technologies is generally good for users.
Interesting use of CSS custom properties to make dynamic color schemes easy and manageable for webpages.
Very thorough analysis on the kind of web frontend performances you can expect for most people on mobile. Since we basically need to reduce the footprint of such frontends to make this sustainable again this is a very welcome article.
Still a young project but that looks like an interesting approach. At least it would make for much smaller bundles than Electron while still enabling the same type of uses. I still have slight concerns about the complexity involved because of all the layers or how much memory this can consume (akin to Electron). Let's wait and see how it evolves.