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import gleam/int
import lustre
import lustre/attribute
import lustre/element.{type Element, element}
import lustre/element/html
import lustre/event
// These examples are written with `lustre/ui` in mind. They'll work regardless,
// but to see what `lustre/ui` can do make sure to run each of these examples with
// the `--use-example-styles` flag:
//
// $ gleam run -m lustre/dev start --use-example-styles
//
// In your own apps, make sure to add the `lustre/ui` dependency and include the
// stylesheet somewhere.
import lustre/ui
// MAIN ------------------------------------------------------------------------
pub fn main() {
let app = lustre.simple(init, update, view)
let assert Ok(_) = lustre.start(app, "#app", Nil)
}
// MODEL -----------------------------------------------------------------------
type Model =
String
fn init(_flags) -> Model {
"div"
}
// UPDATE ----------------------------------------------------------------------
pub opaque type Msg {
Swap
}
fn update(model: Model, msg: Msg) -> Model {
case msg {
Swap if model == "div" -> "p"
Swap if model == "p" -> "div"
_ -> model
}
}
// VIEW ------------------------------------------------------------------------
fn view(model: Model) -> Element(Msg) {
let styles = [#("width", "100vw"), #("height", "100vh"), #("padding", "1rem")]
ui.centre(
[attribute.style(styles)],
ui.stack([], [
ui.button([event.on_click(Swap)], [element.text("change tag")]),
element(model, [], case model {
"div" -> [
html.p([], [html.text("this is a ")]),
html.p([], [html.text(model)]),
]
"p" -> [html.span([], [html.text("but this is a " <> model)])]
_ -> []
}),
]),
)
}
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