This doesn't compile to OpenAPI (pull requests welcome), but I use these blocks as a teaching aid. You're welcome to use them too.
Run npm install.
Then serve index.html locally. It's useful to have it reload, so I use this:
npx browser-sync start --server --files index.html
Try example.json.
The "save" functionality uses local storage so you can engineer the blocks without losing what you built on reload.
Send a pull request if you use this project? Let's share!
- Lorna ( me ) in my talk OpenAPI for Documentarians