loading web assembly files (.wasm)

I saw a question on #clojurescript about this.

Maybe we want to load a Web Assembly module in cljs like this:

(ns my.example
  (:require ["./foo.wasm" as foo]))  ;; <-- hypothetical wasm loader needed

There is work happening to integrate wasm into the normal ecmascript module loading system via:

import "./foo.wasm";  // <-- (hypothetical static import)
import("./foo.wasm"); // <-- (hypothetical dynamic import)

In the meantime, cljs core will probably wait to load these until google closure does, but maybe shadow-cljs can add a loader that does the following (source):

1. Get the .wasm bytes into a typed array or ArrayBuffer
2. Compile the bytes into a WebAssembly.Module
3. Instantiate the WebAssembly.Module with imports to get the callable exports

For reference—how folks are doing it in the webpack world:

• official wasm loader in webpack
• third party wasm-loader

Start with the linked WebAssembly JavaScript API and compare webpack’s wasm-simple example with the third-party wasm-loader. Done means determining how the proposed ClojureScript require form can load .wasm bytes, compile and instantiate the module with imports, and expose callable exports.