How can I run a “hello world” on webassembly with the latest Node.js?

Question

I'm making this question after reading the official documentation and not finding this information.

I'm on Node.js v8.1.3 . How do I compile and run a "hello world" on wast (WebAssembly's textual representation) from within JavaScript on Node.js?

Answer 1

Use node-wasm to load your wasm file and then in your node js app, do this:

import loadWasm from 'node-wasm';

async function run() {
  const {rust_function} = await loadWasm('/local/path/to/wasm');
  const result = rust_function();
  console.log(result);
}

run();

There's a complete example here in the same repo. Good luck!