Ask HN: What are the best resources for learning TypeScript?

I use TypeScript every day, and I most definitely know the basics and even a bit more. But the last time I sat down and actually studied it was a few years ago, and there's been several changes since.

Also, whenever I see something like this:

https://news.ycombinator.com/item?id=41865642

... I realize that maybe I know even less than I thought! Although maybe that's a good thing, types should be kept as simple as possible after all.

I'd like to update and increase my TypeScript knowledge. What are the best resources for this? I like books and docs, and get plenty of daily practice without following challenges, but in the interest of making this useful for people who find it from a search engine, please share all resources that you've found useful :)