This is a great (free!) course on learning CSS from the basics up. Nicely-pitched explanations with plenty of examples.
A very comprehensive directory of accessibility resources.
Vitaly has rounded up a whole load of accessibility posts. I think I’ve linked to most of them at some point, but it’s great to have them all gathered together in one place.
Scott is brilliant, therefore by the transitive property, his course on web performance must also be brilliant.
…for old CSS problems.
A collection of articles and talks about HTML, CSS, and JS, grouped by elements, attributes, properties, selectors, methods, and expressions.
Everything you ever wanted to know about variable fonts, gathered together into one excellent website.
This site is not meant to be exhaustive, but rather a useful guide—our FAQ for design understanding. We hope it will inspire discussion, some questioning, a little soul searching, and ideally, a bit of intellectual support for your everyday endeavors.
The Design Questions Library goes nicely with the Library of Ambiguity.
The 2019 edition of Cody Lindley’s book is a good jumping-off point with lots of links to handy resources.
Following on from that proposal for a browser feature that I linked to yesterday, Tim thinks through all the permutations and possibilities of user agents allowing users to throttle resources:
If a limit does get enforced (it’s important to remember this is still a big if right now), as long as it’s handled with care I can see it being an excellent thing for the web that prioritizes users, while still giving developers the ability to take control of the situation themselves.
How lovely! Going Offline is in very good company in this list, and Oliver has some nice words to say about it:
Extremely beginner-friendly and approachable, it can be read in half a day and will help you get Service Workers up and running in no time.
But all I want for Christmas is for Shopify to stop enabling Breitbart.
A starter list of Fractal examples and links. You can expand it.
A great selection of links about design systems, collected and categorised.
A collection of collections.
This site is dedicated to compiling and sharing useful resources for Designers and UI Developers.