look for similarities with web-types

[jogibear9988]

see https://github.com/JetBrains/web-types
and the comment here: WICG/webcomponents#776 (comment)

[justinfagnani]

I looked at the web-type schema and it doesn't seem sufficient for our use cases. It doesn't seem to describe the JavaScript interface of components much if at all, and seems like it has a lot of Vue-specific concepts in it.