:construction: Start replacing old test examples with structured examples.

1 files changed, 66 insertions, 0 deletions

diff --git a/examples/02-interactivity/src/app.gleam b/examples/02-interactivity/src/app.gleam
new file mode 100644
index 0000000..e47b7a4
--- /dev/null
+++ b/examples/02-interactivity/src/app.gleam
@@ -0,0 +1,66 @@
+import gleam/int
+import lustre
+import lustre/attribute
+import lustre/element.{type 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 `--include-styles` flag:
+//
+//   $ gleam run -m lustre/try -- --include-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", 0)
+}
+
+// MODEL -----------------------------------------------------------------------
+
+type Model =
+  Int
+
+fn init(initial_count: Int) -> Model {
+  case initial_count < 0 {
+    True -> 0
+    False -> initial_count
+  }
+}
+
+// UPDATE ----------------------------------------------------------------------
+
+pub opaque type Msg {
+  Incr
+  Decr
+}
+
+fn update(model: Model, msg: Msg) -> Model {
+  case msg {
+    Incr -> model + 1
+    Decr -> model - 1
+  }
+}
+
+// VIEW ------------------------------------------------------------------------
+
+fn view(model: Model) -> Element(Msg) {
+  let count = int.to_string(model)
+  let styles = [#("width", "100vw"), #("height", "100vh")]
+
+  ui.centre(
+    [attribute.style(styles)],
+    ui.stack([], [
+      ui.button([event.on_click(Incr)], [element.text("+")]),
+      html.p([attribute.style([#("text-align", "center")])], [
+        element.text(count),
+      ]),
+      ui.button([event.on_click(Decr)], [element.text("-")]),
+    ]),
+  )
+}