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squark

Rust frontend framework, for web browser and more.

Currently, we depend on nightly channel

Design

  • Separating runtime definition and implemention
    • squark crate has no dependency for specific platform
  • Architecture inspired from Elm and HyperApp
    • Simplicy
    • Elegant
  • Supporting futures-0.1
    • reducer can emit task for async work such as fetch resource

crates

squark

crates.io docs.rs

Core crate.

  • Pure Rust virtual DOM implemention
  • Definition of GUI application
  • Definition of runtime to handle diffirence of virtual DOM

squark-macros

crates.io docs.rs

It provides macro like JSX for helping writing view.
Very thanks to pest parser.

Syntax

view! {
    <button class="some-class" onclick={ |_| Some(Action::Submit) }>
        Button!
    </button>
}

We can generate native Rust expression at compile-time.

squark-web

crates.io docs.rs

Runtime implemention for web browser with usinng wasm-bindgen.

Here is full example of counter app!

#![feature(proc_macro_hygiene)]

extern crate squark;
extern crate squark_macros;
extern crate squark_web;
extern crate wasm_bindgen;
extern crate web_sys;

use squark::{App, Runtime, View, Task};
use squark_macros::view;
use squark_web::WebRuntime;
use wasm_bindgen::prelude::*;
use web_sys::window;

#[derive(Clone, Debug, PartialEq)]
struct State {
    count: isize,
}

impl State {
    pub fn new() -> State {
        State { count: 0 }
    }
}

#[derive(Clone, Debug)]
enum Action {
    ChangeCount(isize),
}

#[derive(Clone, Debug)]
struct CounterApp;
impl App for CounterApp {
    type State = State;
    type Action = Action;

    fn reducer(&self, mut state: State, action: Action) -> (State, Task<Action>) {
        match action {
            Action::ChangeCount(c) => {
                state.count = c;
            }
        };
        (state, Task::empty())
    }

    fn view(&self, state: State) -> View<Action> {
        let count = state.count;
        view! {
            <div>
                { count.to_string() }
                <button onclick={ move |_| Some(Action::ChangeCount(count.clone() + 1)) }>
                    increment
                </button>
                <button onclick={ move |_| Some(Action::ChangeCount(count - 1)) }>
                    decrement
                </button>
            </div>
        }
    }
}

impl Default for CounterApp {
    fn default() -> CounterApp {
        CounterApp
    }
}

#[wasm_bindgen]
pub fn run() {
    WebRuntime::<CounterApp>::new(
        window()
            .unwrap()
            .document()
            .expect("Failed to get document")
            .query_selector("body")
            .unwrap()
            .unwrap(),
        State::new(),
    )
    .run();
}

Project dir is located at examples/counter.

There are some other examples available on examples, most of them use rust-webpack-template.
TodoMVC is working on https://rail44.github.io/squark/.

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