Learn WebAssembly

Writing custom loading code

Emscripten's generated loading code provides helpful error handling. If you're using Emscripten's output in production, I would recommend that you include it to ensure you're handling errors correctly. However, we don't actually need all the code to utilize our Module. Let's write some much simpler code and test it out. First, let's compile our C file down to glue code with no HTML output. To do that, run the following command:

emcc with-glue.c -O3 -s WASM=1 -s USE_SDL=2 -s MODULARIZE=1 -o custom-loading.js

The -s MODULARIZE=1 compiler flag allows us to use a Promise-like API to load our Module. Once the compilation is complete, create a file in the /chapter-05-create-load-module folder named custom-loading.html ...