A pure javascript shim for WASI
npm install @bjorn3/browser_wasi_shimImplementation status: A subset of wasi_snapshot_preview1 is implemented. The rest either throws an exception, returns an error or is incorrectly implemented.
``
npm install @bjorn3/browser_wasi_shim --save
`javascript
import { WASI, File, OpenFile, ConsoleStdout, PreopenDirectory } from "@bjorn3/browser_wasi_shim";
let args = ["bin", "arg1", "arg2"];
let env = ["FOO=bar"];
let fds = [
new OpenFile(new File([])), // stdin
ConsoleStdout.lineBuffered(msg => console.log([WASI stdout] ${msg})),[WASI stderr] ${msg}
ConsoleStdout.lineBuffered(msg => console.warn()),#include "a"
new PreopenDirectory(".", [
["example.c", new File(new TextEncoder("utf-8").encode())],fn main() { println!("Hello World!"); }
["hello.rs", new File(new TextEncoder("utf-8").encode())],
]),
];
let wasi = new WASI(args, env, fds);
let wasm = await WebAssembly.compileStreaming(fetch("bin.wasm"));
let inst = await WebAssembly.instantiate(wasm, {
"wasi_snapshot_preview1": wasi.wasiImport,
});
wasi.start(inst);
`
`
$ npm install
$ npm run build
The demo requires the wasm rustc artifacts and the xterm js package. To get them run:
`
$ git submodule update --init
$ cd examples && npm install
Run the demo with a static web server from the root of this project:
`
$ npx http-server
And visit [http://127.0.0.1:8080/examples/rustc.html]() in your browser.
A more complete demo by @LyonSyonII which runs
miri inside the browser can be found at
at
`
$ python3 -m pip install -r ./test/wasi-testsuite/test-runner/requirements.txt
$ npm test
Licensed under either of
* Apache License, Version 2.0 (LICENSE-APACHE or
http://www.apache.org/licenses/LICENSE-2.0)
* MIT license (LICENSE-MIT or
http://opensource.org/licenses/MIT)
at your option.
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in the work by you shall be dual licensed as above, without any
additional terms or conditions.