feat: event handling on desktop

packages/html/src/events/composition.rs

@@ -0,0 +1,8 @@
+use dioxus_core::UiEvent;
+
+pub type CompositionEvent = UiEvent<CompositionData>;
+#[cfg_attr(feature = "serialize", derive(serde::Serialize, serde::Deserialize))]
+#[derive(Debug, Clone)]
+pub struct CompositionData {
+    pub data: String,
+}