idealyst new my-app
cd my-app

my-app/
  Cargo.toml          # crate-type: cdylib + rlib
  index.html          # web entry, loads /pkg/my_app.js
  fonts/              # bundled typeface assets
  src/
    lib.rs            # app() + register_extensions()
    app.rs            # the root component
    components/       # one file per ui! element

idealyst dev          # hot-reload at http://localhost:8080

idealyst run ios       # boot in iOS simulator
idealyst run android   # install on emulator or USB device

use runtime_core::{bind, component, signal, text_fmt, ui, Element};

#[component]
pub fn app() -> Element {
    let count = signal!(0);
    ui! {
        text { text_fmt!("Count: {}", bind!(count)) }
        button(
            label = "Increment",
            on_click = move || count.update(|n| *n += 1),
        )
    }
}