How-to: integrate in a Web Worker

The output dist/<ver>/mujoco.js is an Emscripten-built ES module (-sEXPORT_ES6 -sMODULARIZE) and expects to load mujoco.wasm. You typically need to provide locateFile so the module can find the .wasm file.

Minimal module worker example

Assuming mujoco.js and mujoco.wasm are served from the same directory:

import load_mujoco from "./mujoco.js";

const base = new URL(".", import.meta.url);
const Module = await load_mujoco({
  locateFile: (p) => new URL(p, base).toString(),
});

// Module.ccall / Module.cwrap are available for calling exported C functions.

Common pitfalls

If your bundler moves/renames the .wasm asset, locateFile must be updated accordingly.
Worker type matters: the example assumes a module worker so import and import.meta.url work.