xilem_web: Fix linebender#459, and add .boxed() combinator

xilem_web/src/lib.rs

@@ -88,7 +88,7 @@ where
 }
 
 /// A view which can have any [`DomView`] type, see [`AnyView`] for more details.
-pub type AnyDomView<State, Action = ()> = dyn AnyView<State, Action, ViewCtx, AnyPod>;
+pub type AnyDomView<State, Action = ()> = dyn AnyView<State, Action, ViewCtx, AnyPod, DynMessage>;
 
 /// The central [`View`] derived trait to represent DOM nodes in xilem_web, it's the base for all [`View`]s in xilem_web
 pub trait DomView<State, Action = ()>:
@@ -97,6 +97,26 @@ pub trait DomView<State, Action = ()>:
  type DomNode: DomNode<Self::Props>;
  type Props;
 
+ /// Returns a boxed type erased [`AnyDomView`]
+ ///
+ /// # Examples
+ /// ```
+ /// use xilem_web::{elements::html::div, DomView};
+ ///
+ /// # fn view<State: 'static>() -> impl DomView<State> {
+ /// div("a label").boxed()
+ /// # }
+ ///
+ /// ```
+ fn boxed(self) -> Box<AnyDomView<State, Action>>
+ where
+ State: 'static,
+ Action: 'static,
+ Self: Sized,
+ {
+ Box::new(self)
+ }
+
  /// See [`adapt`](`core::adapt`)
  fn adapt<ParentState, ParentAction, ProxyFn>(
  self,