Synchronous prevent default (#2792)

* add prevent default methods to the event

* sync prevent default almost working

* sync prevent default working

* Move event handling into the runtime

* update core tests

* restore desktop file dialog

* implement prevent default on web

* add a hint about the new prevent default method

* fix web prevent default

* Fix CTRL+click on links

* fix values memorize in place test

* Fix a few more tests

* Add a playwright test for sync prevent default

* Fix core doc tests

* create a deprecated VirtualDom::handle_event

* fix macos imports in desktop

* Fix onmounted event

* Fix liveview support

* switch to RefCell for metadata

* Remove println

* remove prevent default attribute

* remove web specific link behavior

* Fix liveview links

* more liveview fixes for link

* Fix merge conflicts

* Fix clippy

* use the new prevent default in the file upload example

packages/router/src/contexts/router.rs

@@ -165,6 +165,19 @@ impl RouterContext {
         }
     }
 
+    /// Check if the router is running in a liveview context
+    /// We do some slightly weird things for liveview because of the network boundary
+    pub fn is_liveview(&self) -> bool {
+        #[cfg(feature = "liveview")]
+        {
+            self.inner.read().history.is_liveview()
+        }
+        #[cfg(not(feature = "liveview"))]
+        {
+            false
+        }
+    }
+
     pub(crate) fn route_from_str(&self, route: &str) -> Result<Rc<dyn Any>, String> {
         self.inner.read().history.parse_route(route)
     }