yewstack/yew

Yew is a Rust framework for building client-side web applications that run in the browser using WebAssembly. It allows developers to write interactive frontend code in Rust rather than JavaScript, with the Rust code compiled to WebAssembly and executed directly in the browser. The framework provides a component model similar to React: applications are built from components that manage their own state and render HTML through a JSX-like macro syntax called html!. Components communicate via properties passed from parent to child and callbacks for events. The virtual DOM diffing approach means only the parts of the page that actually changed get re-rendered. A notable feature highlighted in the README is support for multi-threaded execution in the browser. Web Workers allow offloading heavy computation to background threads, and Yew integrates with this so that computation-heavy tasks do not block the UI thread. Because Rust is a compiled, performance-oriented language, Yew applications can achieve performance characteristics difficult to match with interpreted JavaScript. Yew also supports server-side rendering for scenarios where the initial HTML should be generated on the server before being hydrated in the browser. When to use it: Yew is suited for Rust developers who want to build web frontends while staying within the Rust ecosystem, avoiding context-switching to JavaScript. It is particularly relevant when performance is critical, computation needs to happen in the browser, or when a codebase wants to share data types and logic between a Rust backend and a Rust frontend compiled to WebAssembly. The learning curve assumes familiarity with both Rust's ownership model and web development concepts.