ConfigsApr 12, 2026·1 min read

Leptos — Build Fast Web Applications with Rust

Leptos is a full-stack Rust web framework with fine-grained reactivity. Compiles to WebAssembly for the client and runs server functions natively. Signals-based reactivity (like SolidJS), server-side rendering, and hydration.

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Quick Use

Use it first, then decide how deep to go

This block should tell both the user and the agent what to copy, install, and apply first.

cargo install cargo-leptos
cargo leptos new my_app
cd my_app
cargo leptos watch                          # Dev server with SSR + WASM
cargo leptos build --release                # Production build
use leptos::prelude::*;

#[component]
fn App() -> impl IntoView {
    let (count, set_count) = signal(0);

    view! {
        <h1>"Count: " {count}</h1>
        <button on:click=move |_| set_count.update(|n| *n += 1)>
            "Click me"
        </button>
    }
}

fn main() {
    mount_to_body(App);
}
Intro

Leptos is a full-stack Rust web framework with fine-grained reactivity, inspired by SolidJS. Components compile to WebAssembly for the client and run natively on the server. Server functions, streaming SSR, hydration, and Actix/Axum integration. Created by Greg Johnston.

What Leptos Does

  • Fine-grained reactivity — signals (like SolidJS, not VDOM)
  • SSR — server-side rendering with streaming
  • Hydration — pick up server-rendered HTML on client
  • Server functions — #[server] functions called from client
  • Routing — file-based or declarative
  • Suspense — async data loading boundaries
  • Islands — partial hydration for minimal WASM
  • Actix or Axum — server integration

Comparison

Framework Reactivity SSR WASM
Leptos Signals Streaming Yes
Dioxus Signals Yes Yes
Yew VDOM Yes Yes
SolidJS Signals Yes No (JS)

常见问题 FAQ

Q: 为什么选 signals 而非 VDOM？ A: Signals 只更新变化的 DOM 节点（O(1)），VDOM 需要 diff 整个树（O(n)）。性能更好、WASM bundle 更小。

Q: 和 SolidJS 类似？ A: 非常类似。Leptos 的 API 设计深受 SolidJS 启发，但全栈 Rust（类型安全 + WASM 性能）。

来源与致谢 Sources

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