Type checking, completions and goto definition in VS Code in .md files?

[joostschuur-planetplay]

Is it possible at this point to get the full TypeScript IDE experience in Markdown files in a ```ts` block in Markdown files?

I've seem the reference to TypeScript in the docs, but if I have something like this in config.ts...

export const foo: string | undefined = undefined;

...and then in a Markdown file do this...

```ts
import { foo } from '../lib/config.js';
```

... the Markdown file doesn't know the type for foo.

Is this currently supported for Markdown files? Or is the point of ts/tsx code blocks right now just that you can import from .ts files and the types get stripped out?