Script to inline a WebAssembly module to make it compatible with Netlify edge functions

1-wasm-inliner.ts

import { readFileSync, writeFileSync } from 'fs';

function inlineWasm() {
    const wasmFile = readFileSync("./module.wasm");
    const uInt8Array = new Uint8Array(wasmFile);
    const strRep = uInt8Array.join(",");
    const output = `export const wasmCode = new Uint8Array([${strRep}])`;
    writeFileSync("./wasm.ts", output);
}

inlineWasm();

2-edge-function.ts

// Then, to use it from a Netlify edge function
import { wasmCode } from "./wasm.ts";

const wasmModule = new WebAssembly.Module(wasmCode);
const wasmInstance = new WebAssembly.Instance(wasmModule);
const main = wasmInstance.exports.main as CallableFunction;

export default async () => {
  return new Response(`The answer is: ${main().toString()}`);
}