Leptos Web Framework - Build fast web applications with Rust
Leptos is a groundbreaking full-stack, isomorphic Rust web framework that promises to transform the way developers approach web app development. Focused on fine-grained reactivity, it paves the way for the creation of highly expressive and performant user interfaces. This blog post aims to offer a comprehensive guide to understanding and appreciating Leptos, from code examples to its unique features.
Consider this simple counter component developed with Leptos:
use leptos::*;
#[component]
pub fn SimpleCounter(cx: Scope, initial_value: i32) -> impl IntoView {
let (value, set_value) = create_signal(cx, initial_value);
let clear = move |_| set_value(0);
let decrement = move |_| set_value.update(|value| *value -= 1);
let increment = move |_| set_value.update(|value| *value += );
view! { cx,
<div>
<button on:click=clear></button>
<button on:click=decrement></button>
<span> {value} </span>
<button on:click=increment></button>
</div>
}
}
() {
(|cx| view! { cx, <SimpleCounter initial_value= /> })
}
This code leverages Leptos' innate capabilities to construct a counter component that responds to user events with unparalleled efficiency.
Full-stack: Leptos caters to both browser and server-side rendering. It provides support for HTTP streaming of both data and HTML components.
Isomorphic: Leptos furnishes the capacity to write isomorphic server functions, streamlining client-server communication without the need for a separate REST or other API.
Web platform: Building on web standards and platform, Leptos champions web fundamentals like links and forms.
Framework: Equipped with a reactive system, templating library, and router, Leptos encapsulates everything necessary to build a modern web app.
Fine-grained reactivity: The framework's underlying architecture is fine-grained reactivity, minimizing overhead and enhancing performance.
Declarative: With Leptos, you can define how you want the page to look, and the framework handles the rest.
'cargo-leptos' is a tool designed to make it easy to build apps that run on both the client and server, with seamless integration. It works well with starter templates for Actix or Axum.
What’s up with the name? Leptos (λεπτός) is an ancient Greek word meaning “thin, light, refined, fine-grained.”
Is it production-ready? Yes, Leptos is production-ready, and the APIs are stable.
Can I use this for native GUI? Yes, the reactive system can easily drive any GUI toolkit.
How is this different from Yew/Dioxus/Sycamore? While these frameworks have their unique offerings, Leptos stands out due to its performance and simplicity of its mental model, among other things.
Leptos takes a bold step into the realm of full-stack, isomorphic Rust web frameworks, redefining the possibilities of Rust for web app development. As it continues to grow, its contribution to the Rust ecosystem will be undoubtedly significant.
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