HTMXOLOGY

A type-safe, full-stack web framework for Rust that brings together the power of HTMX and Axum for server-side rendering.

Why HTMXOLOGY?

HTMXOLOGY makes building interactive web applications with HTMX in Rust a joy. It provides:

Type-safe routing - Routes are Rust enums, eliminating typos and broken links
Compile-time guarantees - Know your routes work before running your app
Zero-cost abstractions - Macros generate efficient code with no runtime overhead
First-class HTMX support - Built-in helpers for HTMX attributes and responses
Flexible architecture - Compose controllers for clean, maintainable code

Quick Start

Add HTMXOLOGY to your Cargo.toml:

[dependencies]
htmxology = { version = "0.18", features = ["full"] }
tokio = { version = "1", features = ["full"] }

Create a simple app:

use htmxology::{Route, Controller, Server};

// Define your routes as an enum
#[derive(Route)]
enum AppRoute {
    #[route(GET, "/")]
    Home,
    #[route(GET, "/about")]
    About,
    #[route(GET, "/users/{id}")]
    User(u32),
}

// Implement a controller
struct AppController;

#[htmxology::async_trait]
impl Controller for AppController {
    type Route = AppRoute;
    type Args = ();
    type Response = Result<axum::response::Response, axum::response::Response>;

    async fn handle_request(
        &self,
        route: AppRoute,
        htmx: htmxology::htmx::Request,
        parts: http::request::Parts,
        server_info: &htmxology::ServerInfo,
    ) -> Self::Response {
        match route {
            AppRoute::Home => Ok(axum::response::Html("<h1>Home</h1>").into_response()),
            AppRoute::About => Ok(axum::response::Html("<h1>About</h1>").into_response()),
            AppRoute::User(id) => {
                Ok(axum::response::Html(format!("<h1>User {}</h1>", id)).into_response())
            }
        }
    }
}

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    Server::builder("127.0.0.1:3000")
        .await?
        .build()
        .serve(AppController)
        .await?;
    Ok(())
}

Key Features

Type-Safe Routes

Routes are defined as Rust enums, making your routing logic type-safe and refactor-friendly:

#[derive(Route)]
enum BlogRoute {
    #[route(GET, "/")]
    Index,

    #[route(GET, "/posts/{id}")]
    Post(u32),

    #[route(POST, "/posts", body("application/x-www-form-urlencoded"))]
    CreatePost(#[body] PostForm),

    #[route(GET, "/search", query)]
    Search(#[query] SearchQuery),
}

// Generate URLs with Display
let url = BlogRoute::Post(42).to_string(); // "/posts/42"

// Use in HTMX templates
let attr = BlogRoute::Search(query).as_htmx_attribute(); // hx-get="/search?q=..."

Composable Controllers

Build modular applications with nested controllers:

#[derive(RoutingController)]
#[controller(AppRoute)]
#[subcontroller(BlogController, route = Blog, path = "blog/")]
#[subcontroller(ApiController, route = Api, path = "api/")]
struct AppController {
    blog: BlogController,
    api: ApiController,
}

HTMX Integration

First-class support for HTMX features:

// Access HTMX headers
if htmx.is_htmx_request() {
    // Return partial HTML
} else {
    // Return full page
}

// Generate HTMX attributes from routes
BlogRoute::Post(42).as_htmx_attribute() // "hx-get=\"/posts/42\""

// Type-safe HTML IDs
let id = HtmlId::new("my-element");

Built-in Caching

Add caching to any controller:

use htmxology::{Cache, CachingControllerExt};

let cached_controller = my_controller.with_cache(Cache::default());

Templating Support

Integrate with Askama templates:

#[derive(Template)]
#[template(path = "index.html")]
struct IndexTemplate {
    title: String,
    items: Vec<Item>,
}

// Use RenderIntoResponse trait
impl Controller for MyController {
    async fn handle_request(&self, ...) -> Self::Response {
        let template = IndexTemplate { ... };
        Ok(template.render_into_response()?)
    }
}

Feature Flags

derive - Enable derive macros (Route, DisplayDelegate, RoutingController)
templating - Askama template integration
auto-reload - Development hot-reload support
interfaces - Network interface detection
ws - WebSocket support
full - Enable all features

Examples

Check out the examples directory for complete applications:

blocks - Component-based UI with HTMX
components - Reusable component patterns

Run an example:

cargo install just
just example blocks

htmxology 0.21.0