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// IMPORTS ---------------------------------------------------------------------
import gleam/int
import lustre
import lustre/element.{Element, text}
import lustre/element/html.{button, div, p}
import lustre/event
// MAIN ------------------------------------------------------------------------
pub fn main() {
// A `simple` lustre application doesn't produce `Effect`s. These are best to
// start with if you're just getting started with lustre or you know you don't
// need the runtime to manage any side effects.
let app = lustre.simple(init, update, render)
let assert Ok(_) = lustre.start(app, "[data-lustre-app]")
}
// MODEL -----------------------------------------------------------------------
pub type Model =
Int
pub fn init() -> Model {
0
}
// UPDATE ----------------------------------------------------------------------
pub opaque type Msg {
Incr
Decr
Reset
}
pub fn update(model: Model, msg: Msg) -> Model {
case msg {
Incr -> model + 1
Decr -> model - 1
Reset -> 0
}
}
// VIEW ------------------------------------------------------------------------
pub fn render(model: Model) -> Element(Msg) {
div(
[],
[
button([event.on_click(Incr)], [text("+")]),
button([event.on_click(Decr)], [text("-")]),
button([event.on_click(Reset)], [text("Reset")]),
p([], [text(int.to_string(model))]),
],
)
}
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