Sharing classes from Rust with JavaScript

wasm-bindgen enables sharing classes from JavaScript with Rust and vice versa using simple annotations. It handles all the boilerplate stuff, such as translating a value from JavaScript to WebAssembly or WebAssembly to JavaScript, complex memory manipulations, and error-prone pointer arithmetic. Thus, wasm-bindgen makes everything easier.

Let's see how easy it is to share classes between JavaScript and WebAssembly (from Rust):

1. Create a new project:

   $ cargo new --lib class_world
   Created library `class_world` package

2. Define the wasm-bindgen dependency for the project. Open the cargo.toml file and add the following content:

   [package]
   name = "class_world"
   version = "0.1.0"
   authors = ["Sendil Kumar"]
   edition = "2018"
   [lib]
   crate-type = ["cdylib"]
   [dependencies]
   wasm-bindgen = "0.2.68"

3. Open the src/lib.rs file and replace the content with the following:

   use wasm_bindgen...