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Noob-ish here:

It looks like this playground requires a server connection instead of being purely front-end, which makes sense being Java.

But I'm familiar with SWC's playground (https://swc.rs/playground) and I believe it uses WASM and therefore doesn't require a back-end component.

Is it possible to do something similar with the Rust playground and Java playground?

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I think that yes, it's technically possible with a good amount of work at all layers of the stack. The bigger worry I'd have is purely about time. The Docker images for the Rust playground clock in close to 2 GiB, and there's 3-6 of those. No one is going to wait to download that to run a small program.

Now, because no one has put in all the work to make it happen, I don't know if this would be a real problem or not, but I haven't yet heard a comprehensive counter argument.

Some related ideas:

- Client-side interactive terminal for WASM https://github.com/rust-lang/rust-playground/issues/374

- Compile Rust Language Server into WASM https://github.com/rust-lang/rust-playground/issues/357

For Rust, the issue is that LLVM is very difficult to compile for wasm, but cranelift can't generate wasm. I'm not sure if codegen-gcc can help here.

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