emsdk-docker

Docker container with emsdk installed.

Example usage

We can use this Docker image to build C/C++ files without the need to setup Emscripten on the host machine.

Put the below script in your package.json scripts

docker run -it --rm -u $(id -u):$(id -g) -v $PWD:/src -w /src tuananh/emsdk emcc -O3 src/xxhash.c -s WASM=1 -s SIDE_MODULE=1 -o src/xxhash.wasm

In this example, suppose our project has a src folder with a C file xxhash.c in it. What we do here is that we will mount the src folder into the container's /src folder, compile it the .wasm there in the container and output it back to the host's src folder.

"scripts": {
    "build": "docker run -it --rm -u $(id -u):$(id -g) -v $PWD:/src -w /src tuananh/emsdk emcc -O3 src/xxhash.c -s WASM=1 -s SIDE_MODULE=1 -o src/xxhash.wasm",
    "test": "echo \"Error: no test specified\" && exit 1"
},

and yarn build. BAM!! your .wasm file is there in the src folder.