Integrating a Svelte app with Rust using WebAssembly

Svelte, a popular JavaScript framework known for its efficiency and lack of a virtual DOM, can be integrated with Rust to leverage the latter's speed and safety benefits through WebAssembly (Wasm). Wasm, a binary instruction format that runs in browsers, offers faster performance than JavaScript by being precompiled. This article explores the process of connecting a Svelte frontend with Rust, compiling Rust to Wasm, and exchanging functions and data between JavaScript and Rust. The guide covers setting up a Svelte+Wasm+Rust project, creating and styling a Svelte app, exposing Rust structs and methods to JavaScript, and handling complex data types. It also addresses increasing Wasm's default memory size for larger applications, thereby enabling developers to create highly efficient web apps that utilize Rust's capabilities. Finally, the integration allows for creating shared libraries for both web and desktop environments, enhancing performance and offering interactive demos for complex functionalities.