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> CheerpJ can run existing, full Java applications from unmodified JARs, with no recompilation or pre-processing, straight from bytecode.

I'm kind of curious what limitations happen with networking?

As far as I know, there's no way to do direct socket / network IO in WASM. (IE, you need to use the fetch API.) Likewise, what if a jar uses HTTP, but uses an HTTP library that uses sockets?

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CheerpJ does out-of-the-box support HTTP/HTTPS requests using fetch when the application uses the standard Java UrlConnection APIs. Of course the requests must be to the same domain (which a common case) or to a domain which is CORS enabled, since CheerpJ is subject to the same limitations as any other JavaScript library.

For more general cases our Tailscale integration is required. For more information see: https://cheerpj.com/docs/guides/Networking

I need to check out the tailscale solution, although CheerpJ also makes it trivial to plug in a proxy server, which I currently do in my app that supports cross origin.

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