Frontend Frameworks (Leptos / Yew)

Q: Styling?

Tailwind via trunk, vanilla CSS, or stylers crate. No single standard yet.

Q: Testing components?

Leptos leptos::mount_to_body in tests. Yew TestRenderer for unit tests.

Q: API calls?

reqwest with wasm-bindgen-futures or gloo-net for browser fetch.

Q: Accessibility?

Use semantic HTML in view!/html!. Test with axe and keyboard navigation.

Q: Hot reload?

trunk serve and cargo leptos watch provide dev reload workflows.

Build web UIs entirely in Rust with Leptos or Yew on top of WASM.

Recipe

use leptos::*;
 
#[component]
fn App() -> impl IntoView {
    let (count, set_count) = create_signal(0);
    view! {
        <button on:click=move |_| set_count.update(|n| *n + 1)>
            "Clicked " {count} " times"
        </button>
    }
}

When to reach for this: Teams that want Rust end-to-end for web apps with component-based UI and fine-grained reactivity.

Working Example (Leptos)

use leptos::*;
 
#[component]
fn Greeting(name: String) -> impl IntoView {
    view! { <p>"Hello, " {name} "!"</p> }
}
 
#[component]
fn App() -> impl IntoView {
    let (name, set_name) = create_signal(String::from("Rust"));
    view! {
        <input
            prop:value=move || name.get()
            on:input=move |ev| set_name.set(event_target_value(&ev))
        />
        <Greeting name=name.get()/>
    }
}
 
pub fn main() {
    mount_to_body(|| view! { <App/> })
}

What this demonstrates:

Components are Rust functions with #[component]
Signals drive reactive updates
view! macro compiles to DOM operations
Leptos can hydrate SSR pages or run client-only

Deep Dive

Leptos vs Yew

Framework	Model	Strength
Leptos	Fine-grained signals	Performance, SSR/hydration
Yew	Component virtual DOM	Mature ecosystem, HTML-like macros

Yew Snapshot

use yew::prelude::*;
 
#[function_component]
fn Counter() -> Html {
    let counter = use_state(|| 0);
    html! {
        <button onclick={Callback::from(move |_| counter.set(*counter + 1))}>
            { *counter }
        </button>
    }
}

Project Structure

my-app/
  Cargo.toml       # leptos or yew deps
  src/lib.rs       # components
  index.html       # mount point
  Trunk.toml       # Trunk bundler config (common)

Gotchas

Bundle size - Framework + WASM adds up. Fix: Release builds, wasm-opt, lazy routes.
Ecosystem gaps - Not every JS widget has a Rust binding. Fix: Bridge via wasm-bindgen for specific libraries.
SEO without SSR - Client-only WASM hurts SEO. Fix: Leptos SSR or hybrid rendering.
Router integration - Client routing needs history API setup. Fix: Use leptos_router or yew-router.
Build tool churn - Trunk, wasm-pack, and cargo-leptos differ. Fix: Follow framework book for one blessed path.

Alternatives

Alternative	Use When	Don't Use When
React + WASM module	UI in JS, compute in Rust	Full Rust UI team
Svelte/Solid + WASM	Smaller JS UI bundles	Rust-only shop
web-sys direct	Tiny DOM utilities	Full application UI

FAQs

Leptos CSR vs SSR?

CSR mounts to empty HTML. SSR renders on server then hydrates in browser for faster first paint.

Styling?

Tailwind via trunk, vanilla CSS, or stylers crate. No single standard yet.

State management?

Leptos signals and context. Yew uses hooks and context API similar to React.

Testing components?

Leptos leptos::mount_to_body in tests. Yew TestRenderer for unit tests.

API calls?

reqwest with wasm-bindgen-futures or gloo-net for browser fetch.

Deployment?

Static hosting (Netlify, Cloudflare Pages) for CSR. SSR needs Rust server (Axum + Leptos).

TypeScript interop?

Expose WASM compute crate to TS frontend, or go full Rust UI with frameworks here.

Accessibility?

Use semantic HTML in view!/html!. Test with axe and keyboard navigation.

Hot reload?

trunk serve and cargo leptos watch provide dev reload workflows.

Which framework in 2026?

Leptos for new full-stack Rust web apps. Yew if your team already invested in it.

wasm-bindgen - underlying bridge
DOM & Web APIs (web-sys) - raw browser APIs
wasm-pack & Bundling - build pipeline
Performance & Size - bundle optimization

Stack versions: This page was written for Rust 1.97.0 (edition 2024), Tokio 1.x, Axum 0.8, serde 1.0, sqlx 0.8, clap 4, and Polars 0.46+.

Recipe

use leptos::*;
 
#[component]
fn App() -> impl IntoView {
    let (count, set_count) = create_signal(0);
    view! {
        <button on:click=move |_| set_count.update(|n| *n + 1)>
            "Clicked " {count} " times"
        </button>
    }
}

When to reach for this: Teams that want Rust end-to-end for web apps with component-based UI and fine-grained reactivity.

Working Example (Leptos)

use leptos::*;
 
#[component]
fn Greeting(name: String) -> impl IntoView {
    view! { <p>"Hello, " {name} "!"</p> }
}
 
#[component]
fn App() -> impl IntoView {
    let (name, set_name) = create_signal(String::from("Rust"));
    view! {
        <input
            prop:value=move || name.get()
            on:input=move |ev| set_name.set(event_target_value(&ev))
        />
        <Greeting name=name.get()/>
    }
}
 
pub fn main() {
    mount_to_body(|| view! { <App/> })
}

What this demonstrates:

Components are Rust functions with #[component]
Signals drive reactive updates
view! macro compiles to DOM operations
Leptos can hydrate SSR pages or run client-only

Deep Dive

Leptos vs Yew

Framework	Model	Strength
Leptos	Fine-grained signals	Performance, SSR/hydration
Yew	Component virtual DOM	Mature ecosystem, HTML-like macros

Yew Snapshot

use yew::prelude::*;
 
#[function_component]
fn Counter() -> Html {
    let counter = use_state(|| 0);
    html! {
        <button onclick={Callback::from(move |_| counter.set(*counter + 1))}>
            { *counter }
        </button>
    }
}

Project Structure

my-app/
  Cargo.toml       # leptos or yew deps
  src/lib.rs       # components
  index.html       # mount point
  Trunk.toml       # Trunk bundler config (common)

Gotchas

Bundle size - Framework + WASM adds up. Fix: Release builds, wasm-opt, lazy routes.
Ecosystem gaps - Not every JS widget has a Rust binding. Fix: Bridge via wasm-bindgen for specific libraries.
SEO without SSR - Client-only WASM hurts SEO. Fix: Leptos SSR or hybrid rendering.
Router integration - Client routing needs history API setup. Fix: Use leptos_router or yew-router.
Build tool churn - Trunk, wasm-pack, and cargo-leptos differ. Fix: Follow framework book for one blessed path.

Alternatives

Alternative	Use When	Don't Use When
React + WASM module	UI in JS, compute in Rust	Full Rust UI team
Svelte/Solid + WASM	Smaller JS UI bundles	Rust-only shop
web-sys direct	Tiny DOM utilities	Full application UI

FAQs

Leptos CSR vs SSR?

CSR mounts to empty HTML. SSR renders on server then hydrates in browser for faster first paint.

Styling?

Tailwind via trunk, vanilla CSS, or stylers crate. No single standard yet.

State management?

Leptos signals and context. Yew uses hooks and context API similar to React.

Testing components?

Leptos leptos::mount_to_body in tests. Yew TestRenderer for unit tests.

API calls?

reqwest with wasm-bindgen-futures or gloo-net for browser fetch.

Deployment?

Static hosting (Netlify, Cloudflare Pages) for CSR. SSR needs Rust server (Axum + Leptos).

TypeScript interop?

Expose WASM compute crate to TS frontend, or go full Rust UI with frameworks here.

Accessibility?

Use semantic HTML in view!/html!. Test with axe and keyboard navigation.

Hot reload?

trunk serve and cargo leptos watch provide dev reload workflows.

Which framework in 2026?

Leptos for new full-stack Rust web apps. Yew if your team already invested in it.

wasm-bindgen - underlying bridge
DOM & Web APIs (web-sys) - raw browser APIs
wasm-pack & Bundling - build pipeline
Performance & Size - bundle optimization

Stack versions: This page was written for Rust 1.97.0 (edition 2024), Tokio 1.x, Axum 0.8, serde 1.0, sqlx 0.8, clap 4, and Polars 0.46+.

Frontend Frameworks (Leptos / Yew)

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Frontend Frameworks (Leptos / Yew)