I've seen these called "explorables" or "explorable explanations" before and I really like them. I've been collecting notes on them here: https://simonwillison.net/tags/explorables/
This is a really nice collection. Thanks for putting them together. I'm very partial to this writing style as well.
I took a crack at making it slightly nicer to write this style of blog post via markdown with codeblocks you can mark to execute instead of display (and hot reload + gist rendering support)
It makes the source easy to read, even on GitHub preview, etc.
It's what I've been using to write my recent posts.
Thank you for collecting and sharing these. I was so impressed by the submission that my first thought was to find some repository that contains the samples of a similar caliber.
Here's the website that coined the term: https://explorabl.es/