WebAssembly Modules

Introduction to Modules

WebAssembly modules are the building blocks of WebAssembly applications. They contain code, data, and metadata that can be instantiated and executed by a WebAssembly runtime.

Module Structure

A WebAssembly module consists of several sections, including:

• Type Section: Defines the types used in the module.
• Import Section: Defines imports, such as functions, memories, and tables.
• Function Section: Defines the functions in the module.
• Memory Section: Defines the memory layout of the module.
• Global Section: Defines global variables.
• Export Section: Defines exports, making module components accessible to the host.

Creating and Using Modules

Modules can be created using WebAssembly compilers like `wasm-pack` or by writing WebAssembly code directly.

// Example of a simple WebAssembly module (in Wat format)
(module
 (func $add (param $a i32) (param $b i32) (result i32)
 (i32.add (local.get $a) (local.get $b))
 )
 (export "add" (func $add))
)