1 files changed, 56 insertions, 0 deletions
diff --git a/lib/test/examples/counter.gleam b/lib/test/examples/counter.gleam
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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))]),
+    ],
+  )
+}