Leptos

Leptos is a full-stack web framework for Rust. It uses fine-grained reactive signals to update the page, and it lets you write server functions that run across the server and the browser.

You build interfaces from components that use a view macro for markup. When a signal changes, Leptos updates only the parts of the DOM that depend on it. Server functions look like ordinary function calls in your code, but they run on the server and send results back to the client, which removes the need for hand-written API endpoints for many tasks.

• Fine-grained signals for targeted updates
• Server functions called like normal functions
• Components with a view macro for markup
• Server rendering with client interactivity

Rust developers who want to build complete web apps in one language and keep types shared between server and client. It suits teams that value Rust's type safety and are willing to learn a new reactive model.

Leptos is open source under the MIT licence and free to use. Rust compile times can slow iteration, and the ecosystem is smaller than JavaScript's. The project's docs include a browser playground for trying small examples without installing anything.