yewstack/yew ? reverse-engineered prompt

Build me a Rust based web app framework for the browser using WebAssembly.

I want it to feel like React or JSX, where I can write interactive UI in Rust with a nice HTML like macro, pass Rust values into components, and update the page efficiently when state changes. It should support background work for heavier tasks, work well with multithreaded apps when possible, and let me call into JavaScript or use existing npm packages when I need to.

Please make it easy to build small examples and real apps, with solid docs, tests, and a clean developer experience. If you need to check current Rust or wasm best practices, look up the latest docs online and follow them.