This is the unpublished documentation of wasm-bindgen, the published documentation is available on the main Rust and WebAssembly documentation site . Features documented here may not be available in released versions of wasm-bindgen.

Cargo Features in web-sys

To keep web-sys building as fast as possible, there is a cargo feature for every type defined in web-sys. To access that type, you must enable its feature. To access a method, you must enable the feature for its self type and the features for each of its argument types. In the API documentation, every method lists the features that are required to enable it.

For example, the WebGlRenderingContext::compile_shader function requires these features:

  • WebGlRenderingContext, because that is the method's self type
  • WebGlShader, because it takes an argument of that type