C++ for Node.js WebAssembly Install Emscripten https://github.com/emscripten-core/emsdk.git Compile to wasm em++ -std=c++11 example.cpp -Os -s WASM=1 -s SIDE_MODULE=1 -o example.wasm Run CJS and ESM examples node 1-cjs.js node 2-esm.mjs