Unique syntax highlighting for reactive variables?

[thedamon]

Using composition API one of the biggest hurdles for those used to options API (and maybe for others as well) is getting used to having to know the nature of the reactivity of any given variable.

I think it would be really helpful if the editor was able to highlight ref/reactive, and maybe also shallowRef/shallowReactive in a different way so they can be visually identified immediately without needing to find their definition to check.

Maybe with an underline: 1 line for shallow, 2 lines for deep and a different color for ref vs reactive?

Would this be possible?