When I read the title I was hopping that it would also allow something like the golang or rust playground which I use frequently. I'm wondering now if something like that really exist for VSCode?
Regarding the Golang playground: is this what you're thinking about? https://play.golang.org/. CodeSwing is a general-purpose "interactive coding environment", and therefore, I'd love to expand it over time to include more languages. Right now, it's limited to web scenarios, but that's simply where I started.
Would it be useful to be able to create a new Go/Rust swing inside VS Code, and have it automatically run your code, and display stdout in a console window as you type? Or did you have something else in mind?
The second cool thing about these services is that you can easily share something you made (if I was making a VS Code plugin like that, I would give the option to create a sharable link to a play.golang.org or play.rust-lang.org page
The third cool thing is that you can easily compile using different version and tools.
That being said, if only the first cool thing was implemented, that would already be cool!