Efficient JS Interop with `wasm-bindgen`

Welcome to the final lesson on building high-performance WASM with Rust! So far, you've learned to set up Rust for WASM and write basic functions.

But what about exchanging complex data like strings, objects, or arrays? This is where wasm-bindgen comes in. It's a Rust tool that simplifies interaction between Rust and JavaScript.

wasm-bindgen is a utility that helps you create JavaScript bindings for Rust WebAssembly modules. It handles the low-level details of passing data types between the two languages.

• Automates FFI: It automatically generates JavaScript glue code and Rust FFI (Foreign Function Interface) declarations.
• Rich Type Support: It allows you to pass more complex types like String, JavaScript objects, and even DOM elements directly.
• Improved Developer Experience: It makes your Rust WASM modules feel more like native JavaScript modules.