basic

Basic WebAssembly Component Example

This example demonstrates the simplest possible WebAssembly component using Rust.

Files

• src/lib.rs - Rust component implementation
• wit/hello.wit - WIT interface definition
• BUILD.bazel - Bazel build configuration

Building

# Build the component
bazel build //examples/basic:hello_component

# Test the component
bazel test //examples/basic:hello_component_test

WIT Interface

The component exports a simple hello function:

package hello:world;

world hello {
  export hello: func(name: string) -> string;
}

Running

# Test with wasmtime
wasmtime run --wasi preview2 bazel-bin/examples/basic/hello_component.wasm

# Or use the built-in test
bazel test //examples/basic:hello_component_test

This demonstrates the minimal setup required for a WebAssembly component with rules_wasm_component.