Andrew McNutt

- [ ] Validate forbidden properties - [ ] Highlight required properties - [ ] Smarter "valid json" clean up (eg suggest '' -> "" type things)

Performance optimization: projection placement takes a long time for largeish specs (eg one containing a whole dataset), make caching fast enough where it can deal with that. See for example...

Most of the examples should how to manipulate a single property, it would be useful to to demonstrate how to interact with more than one property.

After changing the position of the examples charts in the in-situ example, the old charts are not cleared.

Many of the dependancies in the main package come from the standard bundle, so it might be good to push it out to it's own package to reduce the size...

There appears to be a small bug in the alt text for images. For instance this chunk of code ```md ::: figure {#fig .margin} ...