Option to expand computed TypeScript types on hover

When working with complex types, I often encounter types like this:

It’s opaque enough that without understanding all the utils that are used and computing it in the head, it’s hard to understand what type is being represented. I’d love to have a way to expand it into the fully resolved type, which in the case of the above example would be:

{
  a: number;
  b?: boolean | null | undefined;
  c: string;
  d: symbol;
}

The impl of actual utils I’m using are inconsequential; it’s the same if we’d used Pick, Omit, or Partial. It’d be great to be able to expand computed types. I’m not sure whether the responsibility for this lies in VSCode or TypeScript, so if I should be moving this there, let me know 😃

[glenjamin]

It might be nice to gate this behind a modifier key, so we can toggle between expanded and unexpanded while the tooltip is up.

[MKRhere]

Update: I found this semi-decent hack that seems to force VSC/TSC to expand the types in some cases:

type Id<T> = {} & { [P in keyof T]: T[P] };

Wrapping a complex type with this mapped Id seems to work. I’ll leave this here for anyone else who has the same problem, but I’d still like a solution without hacks.