Welcome to the introduction to WebAssembly! As a seasoned web developer, you're likely always seeking ways to enhance the performance and functionality of your web applications. Enter WebAssembly (often abbreviated as wasm), an innovative technology that can help you achieve those goals.

WebAssembly is a binary instruction format for a stack-based virtual machine. It's not a programming language you write, but rather a compiled target for languages like C, C++, Rust, and others. This opens up the web platform to a variety of languages, and it supercharges application performance by leveraging hardware capabilities, offering a quick and efficient format that promotes fast loading of web pages.

WebAssembly is designed as a portable target for the compilation of high-level languages, enabling deployment on the web for client and server applications. It is safe: code execution is secured within a sandboxed environment and each wasm module is strictly isolated from each other. It's also part of the open web stack, integrated fully with existing web technologies, and not meant to replace JavaScript but to complement it—working in tandem with JavaScript to take advantage of each's unique strengths.

Over the next few sections, we'll delve into the basics of WebAssembly, the process of compiling C++ into it, understanding WebAssembly Text Format (WAT), and how to call WebAssembly Functions from JavaScript. Buckle up, you're about to experience the power of WebAssembly!

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