Badass. The `GOOS=js` build had so many workarounds needed that it was barely worth it to port existing code, and wasm_exec.js always felt like a terrible hack.

Badass. The `GOOS=js` build had so many workarounds needed that it was barely worth it to port existing code, and wasm_exec.js always felt like a terrible hack. I'll be updating all of my stuff with this and pulling out the shims.