WASI: Make the module, browser compatible

[cdecompilador]

If wasmer-js could do it, making something similar with deno should be possible, right?

[cjihrig]

Since the WASI module is already written in TypeScript, I think shims for the Deno are the only missing piece for browser compatibility, right?

[cdecompilador]

I've been looking at the code and it would require some rethinking of the API to make the needed calls to Deno just at the user side, for example while initializing the Context it sets by default the stdin, stdout and stderr to actual descriptors, when this ones could be abstacted to a ByteStream or something similar, also the ContextConfig handles the filesystem in a very native oriented way, it would mean a lot of changes from what I can see.

I just wanted to open this so future work on wasi has browser compatibility in mind, since its possible and something that in my oppinion is going to be used a lot on the near future

[iuioiua]

Closing this as std/wasi is now deprecated. If you still need to use WASI in Deno, use wasmer-js instead.