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> Even better, port the JVM and the applet infrastructure for maximum "remember the last time we did this exact thing" retro-lulz.

You cant port the entire applet infrastructure since WASM is limited to the same API as Javascript. If WASM doesn't support multithreading, languages targetting WASM wont.



But it does support multithreading.

Things missing are usually specific external protocols. e.g. being able to make a TCP socket; (or higher level things like ignoring CORS).


You can always support multi-threading by not doing multi-threading.




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