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51 lines
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Rust

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#[macro_use]
extern crate seed;
use seed::prelude::*;
// Model
struct Model {
pub val: i32,
}
impl Default for Model {
fn default() -> Self {
Self {
val: 0,
}
}
}
// Update
#[derive(Clone)]
enum Msg {
Increment,
}
fn update(msg: Msg, model: &mut Model) -> Update<Msg> {
match msg {
Msg::Increment => model.val += 1,
}
Render.into()
}
// View
fn view(model: &Model) -> El<Msg> {
button![
simple_ev(Ev::Click, Msg::Increment),
format!("Hello, World × {}", model.val)
]
}
#[wasm_bindgen]
pub fn render() {
seed::App::build(Model::default(), update, view)
.finish()
.run();
}