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The WebAssembly Component Model is a broad-reaching architecture for building interoperable Wasm libraries, applications, and environments.

Understanding componentsBuilding componentsUsing components
Why Components?C/C++Composing
ComponentsC#Running
InterfacesGoDistributing
WorldsJavaScript
Python
Rust

This documentation is aimed at users of the component model: developers of libraries and applications. Compiler and Wasm runtime developers can take a look at the Component Model specification to see how to add support for the component model to their project.

Status

WASI 0.2.0 was released Jan 25, 2024, providing a stable release of WASI and the component model. This is a stable set of WIT definitions that components can target. WASI proposals will continue to evolve and new ones will be introduced; however, users of the component model can now pin to the stable 0.2.0 release.

Contributing

If you find a mistake, omission, ambiguity, or other problem, please let us know via GitHub issues.

If you'd like to contribute content to the guide, please see the contribution guide for information on how to contribute.