Initial design sketch for a web embedding to replace the JS-API

[eqrion]

I'm presenting on Mozilla's prototype implementation which is based off of this, so I wanted to have it publicly accessible somewhere. It needs a couple more iterations before it's ready for detailed review. High-level feedback is welcome though.

[ValorZard]

I have a few dumb questions

1. What parts of the Web APIs DON'T fall under WebIDL?
2. When interacting with javascript types and functions through webidl, are those objects still garbage collected, or does the wasm component take full ownership of them. If I'm writing a rust WASM component for the web, and I get access to a Button, is that button garbage collected? And if so, how? Can I "free" that button in the Rust component and accidentally remove it from the browser somehow?