> ## Documentation Index > Fetch the complete documentation index at: https://notes.kodekloud.com/llms.txt > Use this file to discover all available pages before exploring further. # Section Summary > This article explores WebAssembly fundamentals, practical applications, and guides readers in building a simple module using C, C++, or Rust. In this section, we’ll explore the fundamentals of WebAssembly and its practical applications: * WebAssembly Binary Format (WASM) * Human-readable Text Format (WAT) * WebAssembly System Interface (WASI) You’ll build a simple “Hello World” module in C, C++, or Rust, compile it to WASM, and embed it in a web page using the WebAssembly JavaScript API. Hands-on labs will guide you through environment setup, compilation, and execution in both browser and WASI runtimes. ## Key Topics | Topic | Description | Reference | | ---------------------------- | ---------------------------------------------------------------- | --------------------------------------------------------------------------------------------- | | WebAssembly Binary Format | Compact bytecode optimized for performance | [WASM Spec](https://webassembly.github.io/spec/) | | Text Format (WAT) | Readable s-expression syntax that assembles into WASM binary | [MDN WAT Guide](https://developer.mozilla.org/docs/WebAssembly/Understanding_the_text_format) | | WebAssembly System Interface | POSIX-like APIs for file I/O and networking in WASI environments | [WASI Docs](https://wasi.dev/) | | Module Creation & Execution | Compiling from Rust/C/C++ to WASM and running modules locally | [wasm-bindgen](https://github.com/rustwasm/wasm-bindgen) | | JavaScript Integration | Loading and calling WASM functions via the WebAssembly JS API | [MDN WebAssembly API](https://developer.mozilla.org/docs/WebAssembly/JavaScript_interface) | Make sure you have: * Node.js (v14 or later) * Rust/C/C++ toolchain with WebAssembly targets * A modern browser supporting WASM By the end of this lesson, you will be able to: * Differentiate between WASM binary and text formats * Compile and run WebAssembly modules locally and in the browser * Leverage WASI for system-level interactions * Embed and interact with WebAssembly modules from JavaScript ![The image lists objectives related to WebAssembly, including working with its formats, creating and running modules, and gaining practical experience through hands-on demos.](https://kodekloud.com/kk-media/image/upload/v1752874861/notes-assets/images/Exploring-WebAssembly-WASM-Section-Summary/webassembly-objectives-modules-demos.jpg) ## Useful Resources * [Official WebAssembly Documentation](https://webassembly.org/docs/) * [MDN WebAssembly Guides](https://developer.mozilla.org/docs/WebAssembly) * [Wasmtime Runtime](https://github.com/bytecodealliance/wasmtime)