How to run qjs-wasi.wasm in the browser?

[guest271314]

I'm trying to figure out how to run qjs-wasi.wasm in the browser. My motivation is this SpiderMonkey WASI in browser example https://github.com/mozilla-spidermonkey/sm-wasi-demo and what I did with javy https://github.com/guest271314/javy-browser-host.

What I have so far, that currently just keeps reading from STDIN (fd_read is implemented using a resizable ArrayBuffer).

qjs-wasi-browser.tar.gz

[saghul]

For running in the browser, this is likely more ergonomic: https://github.com/justjake/quickjs-emscripten

Our WASM module will run the REPL, it's like the CLI.

[guest271314]

I've starred that repository before. It should be possible to use qjs-wasi.wasm in the browser, and/or using JavaScript runtimes with WebAssembly.compile(), etc.

[saghul]

I don't think any browser implements WASI, do they?

[guest271314]

WASI is host defined. Check out the WASI implementation I did to run WASI in the browser. I added the import qjs-wasi.wasm expects in the implementation for qjs-wasi-wasm.

[guest271314]

https://guest271314.github.io/javy-browser-host/

https://github.com/guest271314/javy-browser-host/blob/main/wasi-browser.js