I wrote more about it here: https://simonwillison.net/2024/Oct/21/claude-artifacts/ - and a lot of them have explanations in posts under my tools tag: https://simonwillison.net/tags/tools/
It might also be the largest collection of published chat transcripts for this kind of usage from a single person - though that's not hard since most people don't publish their prompts.
Building little things like this is really effective way of gaining experience using prompts to get useful code results out of LLMs.