That’s just for the shading language
The Rust wgpu project has an alternative C API which is identical (or at least closely matches, I haven't looked in detail at it yet) the official webgpu.h header. For instance all examples in here are written in C:
https://github.com/gfx-rs/wgpu-native/tree/trunk/examples
There's definitely also people using wgpu from Zig via the C bindings.
I found:
shlomnissan/sdl-wasm: https://github.com/shlomnissan/sdl-wasm :
> A simple example of compiling C/SDL to WebAssembly and binding it to an HTML5 canvas.
erik-larsen/emscripten-sdl2-ogles2: https://github.com/erik-larsen/emscripten-sdl2-ogles2 :
> C++/SDL2/OpenGLES2 samples running in the browser via Emscripten
IDK how much work there is to migrate these to SDL3?
Are there WASM compilation advantages to SDL3 vs SDL2?
> While WebGPU does not support any shading language other than WGSL, we will automatically convert your non-WGSL shaders if you're running on WebGPU.