Component Model

WebAssembly Interface Type (WIT)

WIT is the interface definition language for the Component Model. WIT describes the imports and exports of a component using interfaces and worlds. WIT is consumed by language toolchains to generate bindings and by runtimes to validate and link components at load time.

GitHub

Documentation

📖
Documentation
https://component-model.bytecodealliance.org/design/wit.html

Other Resources

🔗
Specification
https://github.com/WebAssembly/component-model/blob/main/design/mvp/WIT.md
🔗
Reference
https://github.com/bytecodealliance/wit-bindgen

API entry from apis.yml

apis.yml Raw ↑ 
aid: component-model:wit
name: WebAssembly Interface Type (WIT)
description: WIT is the interface definition language for the Component Model. WIT describes the imports
  and exports of a component using interfaces and worlds. WIT is consumed by language toolchains to generate
  bindings and by runtimes to validate and link components at load time.
humanURL: https://component-model.bytecodealliance.org/design/wit.html
baseURL: https://component-model.bytecodealliance.org
tags:
- Bindings
- IDL
- Interface
- WIT
properties:
- type: Documentation
  url: https://component-model.bytecodealliance.org/design/wit.html
- type: Specification
  url: https://github.com/WebAssembly/component-model/blob/main/design/mvp/WIT.md
- type: Reference
  url: https://github.com/bytecodealliance/wit-bindgen
x-features:
- Declarative IDL for components
- Records, variants, enums, flags, options, results
- Resources with methods for borrowed and owned references
- Interfaces compose into worlds
x-useCases:
- Authoring portable component interfaces
- Generating language bindings via wit-bindgen
- Defining stable contracts between platform and components