Hi everyone! I'm excited to announce Momenta v0.3.0, a fine-grained reactive framework for building user interfaces in Rust.

Momenta gives you element-level reactivity, JSX-like rsx! templates, and a familiar component model — all backed by Rust's type system and ownership guarantees.

What's new in v0.3.0

Server-Side Rendering & Hydration — The new momenta-ssr crate ships with:

• render_to_string for buffered HTML output
• render_to_chunks for streamed/chunked HTML
• render_to_hydration_string with stable data-momenta-* markers and embedded JSON state for client-side resume
• Thin adapters for Axum, Actix, and Hyper

Client-Side Router — The new momenta-router crate provides:

• Hash and pathname routing modes
• Base path support
• Automatic link interception for SPA navigation
• Pattern-based route matching via matchit

Major Performance Improvements — Benchmarked against v0.2.3:

Other highlights:

• Improved RSX whitespace handling
• Better event propagation
• Optimized HTML writer with minimal allocations
• Transient scope cleanup for improved DOM rendering

Quick look

use momenta::prelude::*;

#[component]
fn Counter() -> Node {
    let count = create_signal(0);

    rsx! {
        <div class="counter">
            <h1>"Count: " {count}</h1>
            <button on:click={move |_| count += 1}>"Increment"</button>
        </div>
    }
}

fn main() {
    momenta::dom::render_root::<Counter>("#app");
}

SSR with Axum is just as straightforward:

use momenta::prelude::*;
use momenta_ssr::render_to_string;

let html = render_to_string(|| {
    rsx!(<main><h1>"Hello from Momenta SSR"</h1></main>)
});

Links

• Crates.io: crates.io: Rust Package Registry
• Docs: momenta - Rust
• GitHub: GitHub - elcharitas/momenta: Simple and performant reactivity for building user interfaces in rust · GitHub
• License: MIT

Feedback, issues, and contributions are very welcome. Thanks for checking it out!

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