diff --git a/examples/portals/src/main.rs b/examples/portals/src/main.rs
index 39b46a4f7..da751f49c 100644
--- a/examples/portals/src/main.rs
+++ b/examples/portals/src/main.rs
@@ -31,7 +31,7 @@ impl Component for ShadowDOMHost {
                 .get()
                 .expect("rendered host")
                 .unchecked_into::<Element>()
-                .attach_shadow(&ShadowRootInit::new(ShadowRootMode::Closed))
+                .attach_shadow(&ShadowRootInit::new(ShadowRootMode::Open))
                 .expect("installing shadow root succeeds");
             let inner_host = gloo_utils::document()
                 .create_element("div")
@@ -68,34 +68,73 @@ impl Component for ShadowDOMHost {
 }
 
 pub struct App {
-    pub style_html: Html,
+    style_html: Html,
+    title_element: Element,
+    counter: u32,
+}
+
+pub enum AppMessage {
+    IncreaseCounter,
 }
 
 impl Component for App {
-    type Message = ();
+    type Message = AppMessage;
     type Properties = ();
 
     fn create(_ctx: &Context<Self>) -> Self {
         let document_head = gloo_utils::document()
             .head()
             .expect("head element to be present");
+        let title_element = document_head
+            .query_selector("title")
+            .expect("to find a title element")
+            .expect("to find a title element");
+        title_element.set_text_content(None); // Clear the title element
         let style_html = create_portal(
             html! {
                 <style>{"p { color: red; }"}</style>
             },
             document_head.into(),
         );
-        Self { style_html }
+        Self {
+            style_html,
+            title_element,
+            counter: 0,
+        }
     }
 
-    fn view(&self, _ctx: &Context<Self>) -> Html {
+    fn update(&mut self, _ctx: &Context<Self>, msg: Self::Message) -> bool {
+        match msg {
+            AppMessage::IncreaseCounter => self.counter += 1,
+        }
+        true
+    }
+
+    fn view(&self, ctx: &Context<Self>) -> Html {
+        let onclick = ctx.link().callback(|_| AppMessage::IncreaseCounter);
+        let title = create_portal(
+            html! {
+                if self.counter > 0 {
+                    {format!("Clicked {} times", self.counter)}
+                } else {
+                    {"Yew • Portals"}
+                }
+            },
+            self.title_element.clone(),
+        );
         html! {
             <>
             {self.style_html.clone()}
+            {title}
             <p>{"This paragraph is colored red, and its style is mounted into "}<pre>{"document.head"}</pre>{" with a portal"}</p>
-            <ShadowDOMHost>
-                <p>{"This paragraph is rendered in a shadow dom and thus not affected by the surrounding styling context"}</p>
-            </ShadowDOMHost>
+            <div>
+                <ShadowDOMHost>
+                    <p>{"This paragraph is rendered in a shadow dom and thus not affected by the surrounding styling context"}</p>
+                    <span>{"Buttons clicked inside the shadow dom work fine."}</span>
+                    <button {onclick}>{"Click me!"}</button>
+                </ShadowDOMHost>
+                <p>{format!("The button has been clicked {} times. This is also reflected in the title of the tab!", self.counter)}</p>
+            </div>
             </>
         }
     }
diff --git a/packages/yew/Cargo.toml b/packages/yew/Cargo.toml
index ce95f7420..575845f7c 100644
--- a/packages/yew/Cargo.toml
+++ b/packages/yew/Cargo.toml
@@ -76,6 +76,14 @@ wasm-bindgen-futures = "0.4"
 rustversion = "1"
 trybuild = "1"
 
+[dev-dependencies.web-sys]
+version = "0.3"
+features = [
+  "ShadowRoot",
+  "ShadowRootInit",
+  "ShadowRootMode",
+]
+
 [features]
 ssr = ["futures", "html-escape"]
 csr = []
diff --git a/packages/yew/src/app_handle.rs b/packages/yew/src/app_handle.rs
index a5cc9ca4c..06ac45012 100644
--- a/packages/yew/src/app_handle.rs
+++ b/packages/yew/src/app_handle.rs
@@ -1,5 +1,6 @@
 //! [AppHandle] contains the state Yew keeps to bootstrap a component in an isolated scope.
 
+use crate::dom_bundle::BSubtree;
 use crate::html::Scoped;
 use crate::html::{IntoComponent, NodeRef, Scope};
 use std::ops::Deref;
@@ -22,14 +23,19 @@ where
     /// similarly to the `program` function in Elm. You should provide an initial model, `update`
     /// function which will update the state of the model and a `view` function which
     /// will render the model to a virtual DOM tree.
-    pub(crate) fn mount_with_props(element: Element, props: Rc<ICOMP::Properties>) -> Self {
-        clear_element(&element);
+    pub(crate) fn mount_with_props(host: Element, props: Rc<ICOMP::Properties>) -> Self {
+        clear_element(&host);
         let app = Self {
             scope: Scope::new(None),
         };
-
-        app.scope
-            .mount_in_place(element, NodeRef::default(), NodeRef::default(), props);
+        let hosting_root = BSubtree::create_root(&host);
+        app.scope.mount_in_place(
+            hosting_root,
+            host,
+            NodeRef::default(),
+            NodeRef::default(),
+            props,
+        );
 
         app
     }
@@ -52,8 +58,8 @@ where
 }
 
 /// Removes anything from the given element.
-fn clear_element(element: &Element) {
-    while let Some(child) = element.last_child() {
-        element.remove_child(&child).expect("can't remove a child");
+fn clear_element(host: &Element) {
+    while let Some(child) = host.last_child() {
+        host.remove_child(&child).expect("can't remove a child");
     }
 }
diff --git a/packages/yew/src/dom_bundle/bcomp.rs b/packages/yew/src/dom_bundle/bcomp.rs
index 4b071d2ee..d23b90b0a 100644
--- a/packages/yew/src/dom_bundle/bcomp.rs
+++ b/packages/yew/src/dom_bundle/bcomp.rs
@@ -1,8 +1,7 @@
 //! This module contains the bundle implementation of a virtual component [BComp].
 
-use super::{BNode, Reconcilable, ReconcileTarget};
-use crate::html::AnyScope;
-use crate::html::Scoped;
+use super::{BNode, BSubtree, Reconcilable, ReconcileTarget};
+use crate::html::{AnyScope, Scoped};
 use crate::virtual_dom::{Key, VComp};
 use crate::NodeRef;
 use std::fmt;
@@ -33,7 +32,7 @@ impl fmt::Debug for BComp {
 }
 
 impl ReconcileTarget for BComp {
-    fn detach(self, _parent: &Element, parent_to_detach: bool) {
+    fn detach(self, _root: &BSubtree, _parent: &Element, parent_to_detach: bool) {
         self.scope.destroy_boxed(parent_to_detach);
     }
 
@@ -47,6 +46,7 @@ impl Reconcilable for VComp {
 
     fn attach(
         self,
+        root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
@@ -59,6 +59,7 @@ impl Reconcilable for VComp {
         } = self;
 
         let scope = mountable.mount(
+            root,
             node_ref.clone(),
             parent_scope,
             parent.to_owned(),
@@ -78,6 +79,7 @@ impl Reconcilable for VComp {
 
     fn reconcile_node(
         self,
+        root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
@@ -88,14 +90,15 @@ impl Reconcilable for VComp {
             BNode::Comp(ref mut bcomp)
                 if self.type_id == bcomp.type_id && self.key == bcomp.key =>
             {
-                self.reconcile(parent_scope, parent, next_sibling, bcomp)
+                self.reconcile(root, parent_scope, parent, next_sibling, bcomp)
             }
-            _ => self.replace(parent_scope, parent, next_sibling, bundle),
+            _ => self.replace(root, parent_scope, parent, next_sibling, bundle),
         }
     }
 
     fn reconcile(
         self,
+        _root: &BSubtree,
         _parent_scope: &AnyScope,
         _parent: &Element,
         next_sibling: NodeRef,
@@ -165,22 +168,15 @@ mod tests {
 
     #[test]
     fn update_loop() {
-        let document = gloo_utils::document();
-        let parent_scope: AnyScope = AnyScope::test();
-        let parent_element = document.create_element("div").unwrap();
+        let (root, scope, parent) = setup_parent();
 
         let comp = html! { <Comp></Comp> };
-        let (_, mut bundle) = comp.attach(&parent_scope, &parent_element, NodeRef::default());
+        let (_, mut bundle) = comp.attach(&root, &scope, &parent, NodeRef::default());
         scheduler::start_now();
 
         for _ in 0..10000 {
             let node = html! { <Comp></Comp> };
-            node.reconcile_node(
-                &parent_scope,
-                &parent_element,
-                NodeRef::default(),
-                &mut bundle,
-            );
+            node.reconcile_node(&root, &scope, &parent, NodeRef::default(), &mut bundle);
             scheduler::start_now();
         }
     }
@@ -322,27 +318,28 @@ mod tests {
         }
     }
 
-    fn setup_parent() -> (AnyScope, Element) {
+    fn setup_parent() -> (BSubtree, AnyScope, Element) {
         let scope = AnyScope::test();
         let parent = document().create_element("div").unwrap();
+        let root = BSubtree::create_root(&parent);
 
         document().body().unwrap().append_child(&parent).unwrap();
 
-        (scope, parent)
+        (root, scope, parent)
     }
 
-    fn get_html(node: Html, scope: &AnyScope, parent: &Element) -> String {
+    fn get_html(node: Html, root: &BSubtree, scope: &AnyScope, parent: &Element) -> String {
         // clear parent
         parent.set_inner_html("");
 
-        node.attach(scope, parent, NodeRef::default());
+        node.attach(root, scope, parent, NodeRef::default());
         scheduler::start_now();
         parent.inner_html()
     }
 
     #[test]
     fn all_ways_of_passing_children_work() {
-        let (scope, parent) = setup_parent();
+        let (root, scope, parent) = setup_parent();
 
         let children: Vec<_> = vec!["a", "b", "c"]
             .drain(..)
@@ -359,7 +356,7 @@ mod tests {
         let prop_method = html! {
             <List children={children_renderer.clone()} />
         };
-        assert_eq!(get_html(prop_method, &scope, &parent), expected_html);
+        assert_eq!(get_html(prop_method, &root, &scope, &parent), expected_html);
 
         let children_renderer_method = html! {
             <List>
@@ -367,7 +364,7 @@ mod tests {
             </List>
         };
         assert_eq!(
-            get_html(children_renderer_method, &scope, &parent),
+            get_html(children_renderer_method, &root, &scope, &parent),
             expected_html
         );
 
@@ -376,30 +373,30 @@ mod tests {
                 { children.clone() }
             </List>
         };
-        assert_eq!(get_html(direct_method, &scope, &parent), expected_html);
+        assert_eq!(
+            get_html(direct_method, &root, &scope, &parent),
+            expected_html
+        );
 
         let for_method = html! {
             <List>
                 { for children }
             </List>
         };
-        assert_eq!(get_html(for_method, &scope, &parent), expected_html);
+        assert_eq!(get_html(for_method, &root, &scope, &parent), expected_html);
     }
 
     #[test]
     fn reset_node_ref() {
-        let scope = AnyScope::test();
-        let parent = document().create_element("div").unwrap();
-
-        document().body().unwrap().append_child(&parent).unwrap();
+        let (root, scope, parent) = setup_parent();
 
         let node_ref = NodeRef::default();
         let elem = html! { <Comp ref={node_ref.clone()}></Comp> };
-        let (_, elem) = elem.attach(&scope, &parent, NodeRef::default());
+        let (_, elem) = elem.attach(&root, &scope, &parent, NodeRef::default());
         scheduler::start_now();
         let parent_node = parent.deref();
         assert_eq!(node_ref.get(), parent_node.first_child());
-        elem.detach(&parent, false);
+        elem.detach(&root, &parent, false);
         scheduler::start_now();
         assert!(node_ref.get().is_none());
     }
diff --git a/packages/yew/src/dom_bundle/blist.rs b/packages/yew/src/dom_bundle/blist.rs
index edd1cfc76..fc0caf920 100644
--- a/packages/yew/src/dom_bundle/blist.rs
+++ b/packages/yew/src/dom_bundle/blist.rs
@@ -1,5 +1,5 @@
 //! This module contains fragments bundles, a [BList]
-use super::{test_log, BNode};
+use super::{test_log, BNode, BSubtree};
 use crate::dom_bundle::{Reconcilable, ReconcileTarget};
 use crate::html::{AnyScope, NodeRef};
 use crate::virtual_dom::{Key, VList, VNode, VText};
@@ -31,6 +31,7 @@ impl Deref for BList {
 /// Helper struct, that keeps the position where the next element is to be placed at
 #[derive(Clone)]
 struct NodeWriter<'s> {
+    root: &'s BSubtree,
     parent_scope: &'s AnyScope,
     parent: &'s Element,
     next_sibling: NodeRef,
@@ -45,7 +46,8 @@ impl<'s> NodeWriter<'s> {
             self.parent.outer_html(),
             self.next_sibling
         );
-        let (next, bundle) = node.attach(self.parent_scope, self.parent, self.next_sibling);
+        let (next, bundle) =
+            node.attach(self.root, self.parent_scope, self.parent, self.next_sibling);
         test_log!("  next_position: {:?}", next);
         (
             Self {
@@ -70,7 +72,13 @@ impl<'s> NodeWriter<'s> {
             self.next_sibling
         );
         // Advance the next sibling reference (from right to left)
-        let next = node.reconcile_node(self.parent_scope, self.parent, self.next_sibling, bundle);
+        let next = node.reconcile_node(
+            self.root,
+            self.parent_scope,
+            self.parent,
+            self.next_sibling,
+            bundle,
+        );
         test_log!("  next_position: {:?}", next);
         Self {
             next_sibling: next,
@@ -135,6 +143,7 @@ impl BList {
 
     /// Diff and patch unkeyed child lists
     fn apply_unkeyed(
+        root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
@@ -142,6 +151,7 @@ impl BList {
         rights: &mut Vec<BNode>,
     ) -> NodeRef {
         let mut writer = NodeWriter {
+            root,
             parent_scope,
             parent,
             next_sibling,
@@ -151,7 +161,7 @@ impl BList {
         if lefts.len() < rights.len() {
             for r in rights.drain(lefts.len()..) {
                 test_log!("removing: {:?}", r);
-                r.detach(parent, false);
+                r.detach(root, parent, false);
             }
         }
 
@@ -174,6 +184,7 @@ impl BList {
     /// Optimized for node addition or removal from either end of the list and small changes in the
     /// middle.
     fn apply_keyed(
+        root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
@@ -204,6 +215,7 @@ impl BList {
         if matching_len_end == std::cmp::min(left_vdoms.len(), rev_bundles.len()) {
             // No key changes
             return Self::apply_unkeyed(
+                root,
                 parent_scope,
                 parent,
                 next_sibling,
@@ -215,6 +227,7 @@ impl BList {
         // We partially drain the new vnodes in several steps.
         let mut lefts = left_vdoms;
         let mut writer = NodeWriter {
+            root,
             parent_scope,
             parent,
             next_sibling,
@@ -336,7 +349,7 @@ impl BList {
         // Step 2.3. Remove any extra rights
         for KeyedEntry(_, r) in spare_bundles.drain() {
             test_log!("removing: {:?}", r);
-            r.detach(parent, false);
+            r.detach(root, parent, false);
         }
 
         // Step 3. Diff matching children at the start
@@ -354,9 +367,9 @@ impl BList {
 }
 
 impl ReconcileTarget for BList {
-    fn detach(self, parent: &Element, parent_to_detach: bool) {
+    fn detach(self, root: &BSubtree, parent: &Element, parent_to_detach: bool) {
         for child in self.rev_children.into_iter() {
-            child.detach(parent, parent_to_detach);
+            child.detach(root, parent, parent_to_detach);
         }
     }
 
@@ -372,30 +385,33 @@ impl Reconcilable for VList {
 
     fn attach(
         self,
+        root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
     ) -> (NodeRef, Self::Bundle) {
         let mut self_ = BList::new();
-        let node_ref = self.reconcile(parent_scope, parent, next_sibling, &mut self_);
+        let node_ref = self.reconcile(root, parent_scope, parent, next_sibling, &mut self_);
         (node_ref, self_)
     }
 
     fn reconcile_node(
         self,
+        root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
         bundle: &mut BNode,
     ) -> NodeRef {
-        // 'Forcefully' create a pretend the existing node is a list. Creates a
+        // 'Forcefully' pretend the existing node is a list. Creates a
         // singleton list if it isn't already.
         let blist = bundle.make_list();
-        self.reconcile(parent_scope, parent, next_sibling, blist)
+        self.reconcile(root, parent_scope, parent, next_sibling, blist)
     }
 
     fn reconcile(
         mut self,
+        root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
@@ -426,9 +442,9 @@ impl Reconcilable for VList {
             rights.reserve_exact(additional);
         }
         let first = if self.fully_keyed && blist.fully_keyed {
-            BList::apply_keyed(parent_scope, parent, next_sibling, lefts, rights)
+            BList::apply_keyed(root, parent_scope, parent, next_sibling, lefts, rights)
         } else {
-            BList::apply_unkeyed(parent_scope, parent, next_sibling, lefts, rights)
+            BList::apply_unkeyed(root, parent_scope, parent, next_sibling, lefts, rights)
         };
         blist.fully_keyed = self.fully_keyed;
         blist.key = self.key;
diff --git a/packages/yew/src/dom_bundle/bnode.rs b/packages/yew/src/dom_bundle/bnode.rs
index 2401ea6f2..f04928da1 100644
--- a/packages/yew/src/dom_bundle/bnode.rs
+++ b/packages/yew/src/dom_bundle/bnode.rs
@@ -1,6 +1,6 @@
 //! This module contains the bundle version of an abstract node [BNode]
 
-use super::{BComp, BList, BPortal, BSuspense, BTag, BText};
+use super::{BComp, BList, BPortal, BSubtree, BSuspense, BTag, BText};
 use crate::dom_bundle::{Reconcilable, ReconcileTarget};
 use crate::html::{AnyScope, NodeRef};
 use crate::virtual_dom::{Key, VNode};
@@ -43,20 +43,20 @@ impl BNode {
 
 impl ReconcileTarget for BNode {
     /// Remove VNode from parent.
-    fn detach(self, parent: &Element, parent_to_detach: bool) {
+    fn detach(self, root: &BSubtree, parent: &Element, parent_to_detach: bool) {
         match self {
-            Self::Tag(vtag) => vtag.detach(parent, parent_to_detach),
-            Self::Text(btext) => btext.detach(parent, parent_to_detach),
-            Self::Comp(bsusp) => bsusp.detach(parent, parent_to_detach),
-            Self::List(blist) => blist.detach(parent, parent_to_detach),
+            Self::Tag(vtag) => vtag.detach(root, parent, parent_to_detach),
+            Self::Text(btext) => btext.detach(root, parent, parent_to_detach),
+            Self::Comp(bsusp) => bsusp.detach(root, parent, parent_to_detach),
+            Self::List(blist) => blist.detach(root, parent, parent_to_detach),
             Self::Ref(ref node) => {
                 // Always remove user-defined nodes to clear possible parent references of them
                 if parent.remove_child(node).is_err() {
                     console::warn!("Node not found to remove VRef");
                 }
             }
-            Self::Portal(bportal) => bportal.detach(parent, parent_to_detach),
-            Self::Suspense(bsusp) => bsusp.detach(parent, parent_to_detach),
+            Self::Portal(bportal) => bportal.detach(root, parent, parent_to_detach),
+            Self::Suspense(bsusp) => bsusp.detach(root, parent, parent_to_detach),
         }
     }
 
@@ -82,25 +82,26 @@ impl Reconcilable for VNode {
 
     fn attach(
         self,
+        root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
     ) -> (NodeRef, Self::Bundle) {
         match self {
             VNode::VTag(vtag) => {
-                let (node_ref, tag) = vtag.attach(parent_scope, parent, next_sibling);
+                let (node_ref, tag) = vtag.attach(root, parent_scope, parent, next_sibling);
                 (node_ref, tag.into())
             }
             VNode::VText(vtext) => {
-                let (node_ref, text) = vtext.attach(parent_scope, parent, next_sibling);
+                let (node_ref, text) = vtext.attach(root, parent_scope, parent, next_sibling);
                 (node_ref, text.into())
             }
             VNode::VComp(vcomp) => {
-                let (node_ref, comp) = vcomp.attach(parent_scope, parent, next_sibling);
+                let (node_ref, comp) = vcomp.attach(root, parent_scope, parent, next_sibling);
                 (node_ref, comp.into())
             }
             VNode::VList(vlist) => {
-                let (node_ref, list) = vlist.attach(parent_scope, parent, next_sibling);
+                let (node_ref, list) = vlist.attach(root, parent_scope, parent, next_sibling);
                 (node_ref, list.into())
             }
             VNode::VRef(node) => {
@@ -108,11 +109,12 @@ impl Reconcilable for VNode {
                 (NodeRef::new(node.clone()), BNode::Ref(node))
             }
             VNode::VPortal(vportal) => {
-                let (node_ref, portal) = vportal.attach(parent_scope, parent, next_sibling);
+                let (node_ref, portal) = vportal.attach(root, parent_scope, parent, next_sibling);
                 (node_ref, portal.into())
             }
             VNode::VSuspense(vsuspsense) => {
-                let (node_ref, suspsense) = vsuspsense.attach(parent_scope, parent, next_sibling);
+                let (node_ref, suspsense) =
+                    vsuspsense.attach(root, parent_scope, parent, next_sibling);
                 (node_ref, suspsense.into())
             }
         }
@@ -120,31 +122,42 @@ impl Reconcilable for VNode {
 
     fn reconcile_node(
         self,
+        root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
         bundle: &mut BNode,
     ) -> NodeRef {
-        self.reconcile(parent_scope, parent, next_sibling, bundle)
+        self.reconcile(root, parent_scope, parent, next_sibling, bundle)
     }
 
     fn reconcile(
         self,
+        root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
         bundle: &mut BNode,
     ) -> NodeRef {
         match self {
-            VNode::VTag(vtag) => vtag.reconcile_node(parent_scope, parent, next_sibling, bundle),
-            VNode::VText(vtext) => vtext.reconcile_node(parent_scope, parent, next_sibling, bundle),
-            VNode::VComp(vcomp) => vcomp.reconcile_node(parent_scope, parent, next_sibling, bundle),
-            VNode::VList(vlist) => vlist.reconcile_node(parent_scope, parent, next_sibling, bundle),
+            VNode::VTag(vtag) => {
+                vtag.reconcile_node(root, parent_scope, parent, next_sibling, bundle)
+            }
+            VNode::VText(vtext) => {
+                vtext.reconcile_node(root, parent_scope, parent, next_sibling, bundle)
+            }
+            VNode::VComp(vcomp) => {
+                vcomp.reconcile_node(root, parent_scope, parent, next_sibling, bundle)
+            }
+            VNode::VList(vlist) => {
+                vlist.reconcile_node(root, parent_scope, parent, next_sibling, bundle)
+            }
             VNode::VRef(node) => {
                 let _existing = match bundle {
                     BNode::Ref(ref n) if &node == n => n,
                     _ => {
                         return VNode::VRef(node).replace(
+                            root,
                             parent_scope,
                             parent,
                             next_sibling,
@@ -155,10 +168,10 @@ impl Reconcilable for VNode {
                 NodeRef::new(node)
             }
             VNode::VPortal(vportal) => {
-                vportal.reconcile_node(parent_scope, parent, next_sibling, bundle)
+                vportal.reconcile_node(root, parent_scope, parent, next_sibling, bundle)
             }
             VNode::VSuspense(vsuspsense) => {
-                vsuspsense.reconcile_node(parent_scope, parent, next_sibling, bundle)
+                vsuspsense.reconcile_node(root, parent_scope, parent, next_sibling, bundle)
             }
         }
     }
diff --git a/packages/yew/src/dom_bundle/bportal.rs b/packages/yew/src/dom_bundle/bportal.rs
index 65fe4088a..155f37c60 100644
--- a/packages/yew/src/dom_bundle/bportal.rs
+++ b/packages/yew/src/dom_bundle/bportal.rs
@@ -1,7 +1,6 @@
 //! This module contains the bundle implementation of a portal [BPortal].
 
-use super::test_log;
-use super::BNode;
+use super::{test_log, BNode, BSubtree};
 use crate::dom_bundle::{Reconcilable, ReconcileTarget};
 use crate::html::{AnyScope, NodeRef};
 use crate::virtual_dom::Key;
@@ -10,7 +9,9 @@ use web_sys::Element;
 
 /// The bundle implementation to [VPortal].
 #[derive(Debug)]
-pub(super) struct BPortal {
+pub struct BPortal {
+    // The inner root
+    inner_root: BSubtree,
     /// The element under which the content is inserted.
     host: Element,
     /// The next sibling after the inserted content
@@ -20,10 +21,9 @@ pub(super) struct BPortal {
 }
 
 impl ReconcileTarget for BPortal {
-    fn detach(self, _: &Element, _parent_to_detach: bool) {
-        test_log!("Detaching portal from host{:?}", self.host.outer_html());
-        self.node.detach(&self.host, false);
-        test_log!("Detached portal from host{:?}", self.host.outer_html());
+    fn detach(self, _root: &BSubtree, _parent: &Element, _parent_to_detach: bool) {
+        test_log!("Detaching portal from host",);
+        self.node.detach(&self.inner_root, &self.host, false);
     }
 
     fn shift(&self, _next_parent: &Element, _next_sibling: NodeRef) {
@@ -36,8 +36,9 @@ impl Reconcilable for VPortal {
 
     fn attach(
         self,
+        root: &BSubtree,
         parent_scope: &AnyScope,
-        _parent: &Element,
+        parent: &Element,
         host_next_sibling: NodeRef,
     ) -> (NodeRef, Self::Bundle) {
         let Self {
@@ -45,10 +46,12 @@ impl Reconcilable for VPortal {
             inner_sibling,
             node,
         } = self;
-        let (_, inner) = node.attach(parent_scope, &host, inner_sibling.clone());
+        let inner_root = root.create_subroot(parent.clone(), &host);
+        let (_, inner) = node.attach(&inner_root, parent_scope, &host, inner_sibling.clone());
         (
             host_next_sibling,
             BPortal {
+                inner_root,
                 host,
                 node: Box::new(inner),
                 inner_sibling,
@@ -58,19 +61,23 @@ impl Reconcilable for VPortal {
 
     fn reconcile_node(
         self,
+        root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
         bundle: &mut BNode,
     ) -> NodeRef {
         match bundle {
-            BNode::Portal(portal) => self.reconcile(parent_scope, parent, next_sibling, portal),
-            _ => self.replace(parent_scope, parent, next_sibling, bundle),
+            BNode::Portal(portal) => {
+                self.reconcile(root, parent_scope, parent, next_sibling, portal)
+            }
+            _ => self.replace(root, parent_scope, parent, next_sibling, bundle),
         }
     }
 
     fn reconcile(
         self,
+        _root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
@@ -88,11 +95,16 @@ impl Reconcilable for VPortal {
         if old_host != portal.host || old_inner_sibling != portal.inner_sibling {
             // Remount the inner node somewhere else instead of diffing
             // Move the node, but keep the state
-            portal
-                .node
-                .shift(&portal.host, portal.inner_sibling.clone());
+            let inner_sibling = portal.inner_sibling.clone();
+            portal.node.shift(&portal.host, inner_sibling);
         }
-        node.reconcile_node(parent_scope, parent, next_sibling.clone(), &mut portal.node);
+        node.reconcile_node(
+            &portal.inner_root,
+            parent_scope,
+            parent,
+            next_sibling.clone(),
+            &mut portal.node,
+        );
         next_sibling
     }
 }
diff --git a/packages/yew/src/dom_bundle/bsuspense.rs b/packages/yew/src/dom_bundle/bsuspense.rs
index 18d2a2b15..d653640d4 100644
--- a/packages/yew/src/dom_bundle/bsuspense.rs
+++ b/packages/yew/src/dom_bundle/bsuspense.rs
@@ -1,6 +1,6 @@
 //! This module contains the bundle version of a supsense [BSuspense]
 
-use super::{BNode, Reconcilable, ReconcileTarget};
+use super::{BNode, BSubtree, Reconcilable, ReconcileTarget};
 use crate::html::AnyScope;
 use crate::virtual_dom::{Key, VSuspense};
 use crate::NodeRef;
@@ -31,12 +31,13 @@ impl BSuspense {
 }
 
 impl ReconcileTarget for BSuspense {
-    fn detach(self, parent: &Element, parent_to_detach: bool) {
+    fn detach(self, root: &BSubtree, parent: &Element, parent_to_detach: bool) {
         if let Some(fallback) = self.fallback_bundle {
-            fallback.detach(parent, parent_to_detach);
-            self.children_bundle.detach(&self.detached_parent, false);
+            fallback.detach(root, parent, parent_to_detach);
+            self.children_bundle
+                .detach(root, &self.detached_parent, false);
         } else {
-            self.children_bundle.detach(parent, parent_to_detach);
+            self.children_bundle.detach(root, parent, parent_to_detach);
         }
     }
 
@@ -50,6 +51,7 @@ impl Reconcilable for VSuspense {
 
     fn attach(
         self,
+        root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
@@ -68,8 +70,9 @@ impl Reconcilable for VSuspense {
         // tree while rendering fallback UI into the original place where children resides in.
         if suspended {
             let (_child_ref, children_bundle) =
-                children.attach(parent_scope, &detached_parent, NodeRef::default());
-            let (fallback_ref, fallback) = fallback.attach(parent_scope, parent, next_sibling);
+                children.attach(root, parent_scope, &detached_parent, NodeRef::default());
+            let (fallback_ref, fallback) =
+                fallback.attach(root, parent_scope, parent, next_sibling);
             (
                 fallback_ref,
                 BSuspense {
@@ -80,7 +83,8 @@ impl Reconcilable for VSuspense {
                 },
             )
         } else {
-            let (child_ref, children_bundle) = children.attach(parent_scope, parent, next_sibling);
+            let (child_ref, children_bundle) =
+                children.attach(root, parent_scope, parent, next_sibling);
             (
                 child_ref,
                 BSuspense {
@@ -95,6 +99,7 @@ impl Reconcilable for VSuspense {
 
     fn reconcile_node(
         self,
+        root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
@@ -103,14 +108,15 @@ impl Reconcilable for VSuspense {
         match bundle {
             // We only preserve the child state if they are the same suspense.
             BNode::Suspense(m) if m.key == self.key => {
-                self.reconcile(parent_scope, parent, next_sibling, m)
+                self.reconcile(root, parent_scope, parent, next_sibling, m)
             }
-            _ => self.replace(parent_scope, parent, next_sibling, bundle),
+            _ => self.replace(root, parent_scope, parent, next_sibling, bundle),
         }
     }
 
     fn reconcile(
         self,
+        root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
@@ -132,30 +138,33 @@ impl Reconcilable for VSuspense {
             // Both suspended, reconcile children into detached_parent, fallback into the DOM
             (true, Some(fallback_bundle)) => {
                 children.reconcile_node(
+                    root,
                     parent_scope,
                     &suspense.detached_parent,
                     NodeRef::default(),
                     children_bundle,
                 );
 
-                fallback.reconcile_node(parent_scope, parent, next_sibling, fallback_bundle)
+                fallback.reconcile_node(root, parent_scope, parent, next_sibling, fallback_bundle)
             }
             // Not suspended, just reconcile the children into the DOM
             (false, None) => {
-                children.reconcile_node(parent_scope, parent, next_sibling, children_bundle)
+                children.reconcile_node(root, parent_scope, parent, next_sibling, children_bundle)
             }
             // Freshly suspended. Shift children into the detached parent, then add fallback to the DOM
             (true, None) => {
                 children_bundle.shift(&suspense.detached_parent, NodeRef::default());
 
                 children.reconcile_node(
+                    root,
                     parent_scope,
                     &suspense.detached_parent,
                     NodeRef::default(),
                     children_bundle,
                 );
                 // first render of fallback
-                let (fallback_ref, fallback) = fallback.attach(parent_scope, parent, next_sibling);
+                let (fallback_ref, fallback) =
+                    fallback.attach(root, parent_scope, parent, next_sibling);
                 suspense.fallback_bundle = Some(fallback);
                 fallback_ref
             }
@@ -165,10 +174,10 @@ impl Reconcilable for VSuspense {
                     .fallback_bundle
                     .take()
                     .unwrap() // We just matched Some(_)
-                    .detach(parent, false);
+                    .detach(root, parent, false);
 
                 children_bundle.shift(parent, next_sibling.clone());
-                children.reconcile_node(parent_scope, parent, next_sibling, children_bundle)
+                children.reconcile_node(root, parent_scope, parent, next_sibling, children_bundle)
             }
         }
     }
diff --git a/packages/yew/src/dom_bundle/btag/attributes.rs b/packages/yew/src/dom_bundle/btag/attributes.rs
index 761d74986..9d5ded00c 100644
--- a/packages/yew/src/dom_bundle/btag/attributes.rs
+++ b/packages/yew/src/dom_bundle/btag/attributes.rs
@@ -1,4 +1,5 @@
 use super::Apply;
+use crate::dom_bundle::BSubtree;
 use crate::virtual_dom::vtag::{InputFields, Value};
 use crate::virtual_dom::Attributes;
 use indexmap::IndexMap;
@@ -11,14 +12,14 @@ impl<T: AccessValue> Apply for Value<T> {
     type Element = T;
     type Bundle = Self;
 
-    fn apply(self, el: &Self::Element) -> Self {
+    fn apply(self, _root: &BSubtree, el: &Self::Element) -> Self {
         if let Some(v) = self.deref() {
             el.set_value(v);
         }
         self
     }
 
-    fn apply_diff(self, el: &Self::Element, bundle: &mut Self) {
+    fn apply_diff(self, _root: &BSubtree, el: &Self::Element, bundle: &mut Self) {
         match (self.deref(), (*bundle).deref()) {
             (Some(new), Some(_)) => {
                 // Refresh value from the DOM. It might have changed.
@@ -62,21 +63,21 @@ impl Apply for InputFields {
     type Element = InputElement;
     type Bundle = Self;
 
-    fn apply(mut self, el: &Self::Element) -> Self {
+    fn apply(mut self, root: &BSubtree, el: &Self::Element) -> Self {
         // IMPORTANT! This parameter has to be set every time
         // to prevent strange behaviour in the browser when the DOM changes
         el.set_checked(self.checked);
 
-        self.value = self.value.apply(el);
+        self.value = self.value.apply(root, el);
         self
     }
 
-    fn apply_diff(self, el: &Self::Element, bundle: &mut Self) {
+    fn apply_diff(self, root: &BSubtree, el: &Self::Element, bundle: &mut Self) {
         // IMPORTANT! This parameter has to be set every time
         // to prevent strange behaviour in the browser when the DOM changes
         el.set_checked(self.checked);
 
-        self.value.apply_diff(el, &mut bundle.value);
+        self.value.apply_diff(root, el, &mut bundle.value);
     }
 }
 
@@ -186,7 +187,7 @@ impl Apply for Attributes {
     type Element = Element;
     type Bundle = Self;
 
-    fn apply(self, el: &Element) -> Self {
+    fn apply(self, _root: &BSubtree, el: &Element) -> Self {
         match &self {
             Self::Static(arr) => {
                 for kv in arr.iter() {
@@ -209,7 +210,7 @@ impl Apply for Attributes {
         self
     }
 
-    fn apply_diff(self, el: &Element, bundle: &mut Self) {
+    fn apply_diff(self, _root: &BSubtree, el: &Element, bundle: &mut Self) {
         #[inline]
         fn ptr_eq<T>(a: &[T], b: &[T]) -> bool {
             std::ptr::eq(a, b)
diff --git a/packages/yew/src/dom_bundle/btag/listeners.rs b/packages/yew/src/dom_bundle/btag/listeners.rs
index 687e92106..d5676316d 100644
--- a/packages/yew/src/dom_bundle/btag/listeners.rs
+++ b/packages/yew/src/dom_bundle/btag/listeners.rs
@@ -1,42 +1,38 @@
 use super::Apply;
-use crate::dom_bundle::test_log;
-use crate::virtual_dom::{Listener, ListenerKind, Listeners};
-use gloo::events::{EventListener, EventListenerOptions, EventListenerPhase};
+use crate::dom_bundle::{test_log, BSubtree, EventDescriptor};
+use crate::virtual_dom::{Listener, Listeners};
+use ::wasm_bindgen::{prelude::wasm_bindgen, JsCast};
 use std::cell::RefCell;
-use std::collections::{HashMap, HashSet};
+use std::collections::HashMap;
 use std::ops::Deref;
 use std::rc::Rc;
-use std::sync::atomic::{AtomicBool, Ordering};
-use wasm_bindgen::JsCast;
-use web_sys::{Element, Event};
+use web_sys::{Element, Event, EventTarget as HtmlEventTarget};
 
-thread_local! {
-    /// Global event listener registry
-    static REGISTRY: RefCell<Registry> = Default::default();
-
-    /// Key used to store listener id on element
-    static LISTENER_ID_PROP: wasm_bindgen::JsValue = "__yew_listener_id".into();
-
-    /// Cached reference to the document body
-    static BODY: web_sys::HtmlElement = gloo_utils::document().body().unwrap();
+#[wasm_bindgen]
+extern "C" {
+    // Duck-typing, not a real class on js-side. On rust-side, use impls of EventTarget below
+    type EventTargetable;
+    #[wasm_bindgen(method, getter = __yew_listener_id, structural)]
+    fn listener_id(this: &EventTargetable) -> Option<u32>;
+    #[wasm_bindgen(method, setter = __yew_listener_id, structural)]
+    fn set_listener_id(this: &EventTargetable, id: u32);
 }
 
-/// Bubble events during delegation
-static BUBBLE_EVENTS: AtomicBool = AtomicBool::new(true);
+/// DOM-Types that can have listeners registered on them.
+/// Uses the duck-typed interface from above in impls.
+pub trait EventListening {
+    fn listener_id(&self) -> Option<u32>;
+    fn set_listener_id(&self, id: u32);
+}
 
-/// Set, if events should bubble up the DOM tree, calling any matching callbacks.
-///
-/// Bubbling is enabled by default. Disabling bubbling can lead to substantial improvements in event
-/// handling performance.
-///
-/// Note that yew uses event delegation and implements internal even bubbling for performance
-/// reasons. Calling `Event.stopPropagation()` or `Event.stopImmediatePropagation()` in the event
-/// handler has no effect.
-///
-/// This function should be called before any component is mounted.
-#[cfg_attr(documenting, doc(cfg(feature = "render")))]
-pub fn set_event_bubbling(bubble: bool) {
-    BUBBLE_EVENTS.store(bubble, Ordering::Relaxed);
+impl EventListening for Element {
+    fn listener_id(&self) -> Option<u32> {
+        self.unchecked_ref::<EventTargetable>().listener_id()
+    }
+
+    fn set_listener_id(&self, id: u32) {
+        self.unchecked_ref::<EventTargetable>().set_listener_id(id);
+    }
 }
 
 /// An active set of listeners on an element
@@ -52,14 +48,14 @@ impl Apply for Listeners {
     type Element = Element;
     type Bundle = ListenerRegistration;
 
-    fn apply(self, el: &Self::Element) -> ListenerRegistration {
+    fn apply(self, root: &BSubtree, el: &Self::Element) -> ListenerRegistration {
         match self {
-            Self::Pending(pending) => ListenerRegistration::register(el, &pending),
+            Self::Pending(pending) => ListenerRegistration::register(root, el, &pending),
             Self::None => ListenerRegistration::NoReg,
         }
     }
 
-    fn apply_diff(self, el: &Self::Element, bundle: &mut ListenerRegistration) {
+    fn apply_diff(self, root: &BSubtree, el: &Self::Element, bundle: &mut ListenerRegistration) {
         use ListenerRegistration::*;
         use Listeners::*;
 
@@ -67,10 +63,10 @@ impl Apply for Listeners {
             (Pending(pending), Registered(ref id)) => {
                 // Reuse the ID
                 test_log!("reusing listeners for {}", id);
-                Registry::with(|reg| reg.patch(id, &*pending));
+                root.with_listener_registry(|reg| reg.patch(root, id, &*pending));
             }
             (Pending(pending), bundle @ NoReg) => {
-                *bundle = ListenerRegistration::register(el, &pending);
+                *bundle = ListenerRegistration::register(root, el, &pending);
                 test_log!(
                     "registering listeners for {}",
                     match bundle {
@@ -85,7 +81,7 @@ impl Apply for Listeners {
                     _ => unreachable!(),
                 };
                 test_log!("unregistering listeners for {}", id);
-                Registry::with(|reg| reg.unregister(id));
+                root.with_listener_registry(|reg| reg.unregister(id));
                 *bundle = NoReg;
             }
             (None, NoReg) => {
@@ -97,116 +93,75 @@ impl Apply for Listeners {
 
 impl ListenerRegistration {
     /// Register listeners and return their handle ID
-    fn register(el: &Element, pending: &[Option<Rc<dyn Listener>>]) -> Self {
-        Self::Registered(Registry::with(|reg| {
-            let id = reg.set_listener_id(el);
-            reg.register(id, pending);
+    fn register(root: &BSubtree, el: &Element, pending: &[Option<Rc<dyn Listener>>]) -> Self {
+        Self::Registered(root.with_listener_registry(|reg| {
+            let id = reg.set_listener_id(root, el);
+            reg.register(root, id, pending);
             id
         }))
     }
 
     /// Remove any registered event listeners from the global registry
-    pub fn unregister(&self) {
+    pub fn unregister(&self, root: &BSubtree) {
         if let Self::Registered(id) = self {
-            Registry::with(|r| r.unregister(id));
-        }
-    }
-}
-
-#[derive(Clone, Hash, Eq, PartialEq, Debug)]
-struct EventDescriptor {
-    kind: ListenerKind,
-    passive: bool,
-}
-
-impl From<&dyn Listener> for EventDescriptor {
-    fn from(l: &dyn Listener) -> Self {
-        Self {
-            kind: l.kind(),
-            passive: l.passive(),
-        }
-    }
-}
-
-/// Ensures global event handler registration.
-//
-// Separate struct to DRY, while avoiding partial struct mutability.
-#[derive(Default, Debug)]
-struct GlobalHandlers {
-    /// Events with registered handlers that are possibly passive
-    handling: HashSet<EventDescriptor>,
-
-    /// Keep track of all listeners to drop them on registry drop.
-    /// The registry is never dropped in production.
-    #[cfg(test)]
-    registered: Vec<(ListenerKind, EventListener)>,
-}
-
-impl GlobalHandlers {
-    /// Ensure a descriptor has a global event handler assigned
-    fn ensure_handled(&mut self, desc: EventDescriptor) {
-        if !self.handling.contains(&desc) {
-            let cl = {
-                let desc = desc.clone();
-                BODY.with(move |body| {
-                    let options = EventListenerOptions {
-                        phase: EventListenerPhase::Capture,
-                        passive: desc.passive,
-                    };
-                    EventListener::new_with_options(
-                        body,
-                        desc.kind.type_name(),
-                        options,
-                        move |e: &Event| Registry::handle(desc.clone(), e.clone()),
-                    )
-                })
-            };
-
-            // Never drop the closure as this event handler is static
-            #[cfg(not(test))]
-            cl.forget();
-            #[cfg(test)]
-            self.registered.push((desc.kind.clone(), cl));
-
-            self.handling.insert(desc);
+            root.with_listener_registry(|r| r.unregister(id));
         }
     }
 }
 
 /// Global multiplexing event handler registry
-#[derive(Default, Debug)]
-struct Registry {
+#[derive(Debug)]
+pub struct Registry {
     /// Counter for assigning new IDs
     id_counter: u32,
 
-    /// Registered global event handlers
-    global: GlobalHandlers,
-
     /// Contains all registered event listeners by listener ID
     by_id: HashMap<u32, HashMap<EventDescriptor, Vec<Rc<dyn Listener>>>>,
 }
 
 impl Registry {
-    /// Run f with access to global Registry
-    #[inline]
-    fn with<R>(f: impl FnOnce(&mut Registry) -> R) -> R {
-        REGISTRY.with(|r| f(&mut *r.borrow_mut()))
+    pub fn new() -> Self {
+        Self {
+            id_counter: u32::default(),
+            by_id: HashMap::default(),
+        }
+    }
+
+    /// Handle a single event, given the listening element and event descriptor.
+    pub fn get_handler(
+        registry: &RefCell<Registry>,
+        listening: &dyn EventListening,
+        desc: &EventDescriptor,
+    ) -> Option<impl FnOnce(&Event)> {
+        // The tricky part is that we want to drop the reference to the registry before
+        // calling any actual listeners (since that might end up running lifecycle methods
+        // and modify the registry). So we clone the current listeners and return a closure
+        let listener_id = listening.listener_id()?;
+        let registry_ref = registry.borrow();
+        let handlers = registry_ref.by_id.get(&listener_id)?;
+        let listeners = handlers.get(desc)?.clone();
+        drop(registry_ref); // unborrow the registry, before running any listeners
+        Some(move |event: &Event| {
+            for l in listeners {
+                l.handle(event.clone());
+            }
+        })
     }
 
     /// Register all passed listeners under ID
-    fn register(&mut self, id: u32, listeners: &[Option<Rc<dyn Listener>>]) {
+    fn register(&mut self, root: &BSubtree, id: u32, listeners: &[Option<Rc<dyn Listener>>]) {
         let mut by_desc =
             HashMap::<EventDescriptor, Vec<Rc<dyn Listener>>>::with_capacity(listeners.len());
         for l in listeners.iter().filter_map(|l| l.as_ref()).cloned() {
             let desc = EventDescriptor::from(l.deref());
-            self.global.ensure_handled(desc.clone());
+            root.ensure_handled(&desc);
             by_desc.entry(desc).or_default().push(l);
         }
         self.by_id.insert(id, by_desc);
     }
 
     /// Patch an already registered set of handlers
-    fn patch(&mut self, id: &u32, listeners: &[Option<Rc<dyn Listener>>]) {
+    fn patch(&mut self, root: &BSubtree, id: &u32, listeners: &[Option<Rc<dyn Listener>>]) {
         if let Some(by_desc) = self.by_id.get_mut(id) {
             // Keeping empty vectors is fine. Those don't do much and should happen rarely.
             for v in by_desc.values_mut() {
@@ -215,7 +170,7 @@ impl Registry {
 
             for l in listeners.iter().filter_map(|l| l.as_ref()).cloned() {
                 let desc = EventDescriptor::from(l.deref());
-                self.global.ensure_handled(desc.clone());
+                root.ensure_handled(&desc);
                 by_desc.entry(desc).or_default().push(l);
             }
         }
@@ -227,76 +182,30 @@ impl Registry {
     }
 
     /// Set unique listener ID onto element and return it
-    fn set_listener_id(&mut self, el: &Element) -> u32 {
+    fn set_listener_id(&mut self, root: &BSubtree, el: &Element) -> u32 {
         let id = self.id_counter;
         self.id_counter += 1;
 
-        LISTENER_ID_PROP.with(|prop| {
-            if !js_sys::Reflect::set(el, prop, &js_sys::Number::from(id)).unwrap() {
-                panic!("failed to set listener ID property");
-            }
-        });
+        root.brand_element(el as &HtmlEventTarget);
+        el.set_listener_id(id);
 
         id
     }
-
-    /// Handle a global event firing
-    fn handle(desc: EventDescriptor, event: Event) {
-        let target = match event
-            .target()
-            .and_then(|el| el.dyn_into::<web_sys::Element>().ok())
-        {
-            Some(el) => el,
-            None => return,
-        };
-
-        Self::run_handlers(desc, event, target);
-    }
-
-    fn run_handlers(desc: EventDescriptor, event: Event, target: web_sys::Element) {
-        let run_handler = |el: &web_sys::Element| {
-            if let Some(l) = LISTENER_ID_PROP
-                .with(|prop| js_sys::Reflect::get(el, prop).ok())
-                .and_then(|v| v.dyn_into().ok())
-                .and_then(|num: js_sys::Number| {
-                    Registry::with(|r| {
-                        r.by_id
-                            .get(&(num.value_of() as u32))
-                            .and_then(|s| s.get(&desc))
-                            .cloned()
-                    })
-                })
-            {
-                for l in l {
-                    l.handle(event.clone());
-                }
-            }
-        };
-
-        run_handler(&target);
-
-        if BUBBLE_EVENTS.load(Ordering::Relaxed) {
-            let mut el = target;
-            while !event.cancel_bubble() {
-                el = match el.parent_element() {
-                    Some(el) => el,
-                    None => break,
-                };
-                run_handler(&el);
-            }
-        }
-    }
 }
 
-#[cfg(all(test, feature = "wasm_test"))]
+#[cfg(feature = "wasm_test")]
+#[cfg(test)]
 mod tests {
     use std::marker::PhantomData;
 
     use wasm_bindgen_test::{wasm_bindgen_test as test, wasm_bindgen_test_configure};
-    use web_sys::{Event, EventInit, MouseEvent};
+    use web_sys::{Event, EventInit, HtmlElement, MouseEvent};
     wasm_bindgen_test_configure!(run_in_browser);
 
-    use crate::{html, html::TargetCast, scheduler, AppHandle, Component, Context, Html};
+    use crate::{
+        create_portal, html, html::TargetCast, scheduler, virtual_dom::VNode, AppHandle, Component,
+        Context, Html, NodeRef, Properties,
+    };
     use gloo_utils::document;
     use wasm_bindgen::JsCast;
     use yew::Callback;
@@ -315,29 +224,16 @@ mod tests {
         text: String,
     }
 
-    trait Mixin {
+    #[derive(Default, PartialEq, Properties)]
+    struct MixinProps<M: Properties> {
+        state_ref: NodeRef,
+        wrapped: M,
+    }
+
+    trait Mixin: Properties + Sized {
         fn view<C>(ctx: &Context<C>, state: &State) -> Html
         where
-            C: Component<Message = Message>,
-        {
-            let link = ctx.link().clone();
-            let onclick = Callback::from(move |_| {
-                link.send_message(Message::Action);
-                scheduler::start_now();
-            });
-
-            if state.stop_listening {
-                html! {
-                    <a>{state.action}</a>
-                }
-            } else {
-                html! {
-                    <a {onclick}>
-                        {state.action}
-                    </a>
-                }
-            }
-        }
+            C: Component<Message = Message, Properties = MixinProps<Self>>;
     }
 
     struct Comp<M>
@@ -350,10 +246,10 @@ mod tests {
 
     impl<M> Component for Comp<M>
     where
-        M: Mixin + 'static,
+        M: Mixin + Properties + 'static,
     {
         type Message = Message;
-        type Properties = ();
+        type Properties = MixinProps<M>;
 
         fn create(_: &Context<Self>) -> Self {
             Comp {
@@ -382,68 +278,103 @@ mod tests {
         }
     }
 
-    fn assert_count(el: &web_sys::HtmlElement, count: isize) {
-        assert_eq!(el.text_content(), Some(count.to_string()))
+    #[track_caller]
+    fn assert_count(el: &NodeRef, count: isize) {
+        let text = el
+            .get()
+            .expect("State ref not bound in the test case?")
+            .text_content();
+        assert_eq!(text, Some(count.to_string()))
     }
 
-    fn get_el_by_tag(tag: &str) -> web_sys::HtmlElement {
+    #[track_caller]
+    fn click(el: &NodeRef) {
+        el.get().unwrap().dyn_into::<HtmlElement>().unwrap().click();
+        scheduler::start_now();
+    }
+
+    fn get_el_by_selector(selector: &str) -> web_sys::HtmlElement {
         document()
-            .query_selector(tag)
+            .query_selector(selector)
             .unwrap()
             .unwrap()
             .dyn_into::<web_sys::HtmlElement>()
             .unwrap()
     }
 
-    fn init<M>(tag: &str) -> (AppHandle<Comp<M>>, web_sys::HtmlElement)
+    fn init<M>() -> (AppHandle<Comp<M>>, NodeRef)
     where
-        M: Mixin,
+        M: Mixin + Properties + Default,
     {
-        // Remove any existing listeners and elements
-        super::Registry::with(|r| *r = Default::default());
-        if let Some(el) = document().query_selector(tag).unwrap() {
-            el.parent_element().unwrap().remove();
+        // Remove any existing elements
+        let body = document().body().unwrap();
+        while let Some(child) = body.query_selector("div#testroot").unwrap() {
+            body.remove_child(&child).unwrap();
         }
 
         let root = document().create_element("div").unwrap();
-        document().body().unwrap().append_child(&root).unwrap();
-        let app = crate::Renderer::<Comp<M>>::with_root(root).render();
+        root.set_id("testroot");
+        body.append_child(&root).unwrap();
+        let props = <Comp<M> as Component>::Properties::default();
+        let el_ref = props.state_ref.clone();
+        let app = crate::Renderer::<Comp<M>>::with_root_and_props(root, props).render();
         scheduler::start_now();
 
-        (app, get_el_by_tag(tag))
+        (app, el_ref)
     }
 
     #[test]
     fn synchronous() {
+        #[derive(Default, PartialEq, Properties)]
         struct Synchronous;
 
-        impl Mixin for Synchronous {}
+        impl Mixin for Synchronous {
+            fn view<C>(ctx: &Context<C>, state: &State) -> Html
+            where
+                C: Component<Message = Message, Properties = MixinProps<Self>>,
+            {
+                let onclick = ctx.link().callback(|_| Message::Action);
 
-        let (link, el) = init::<Synchronous>("a");
+                if state.stop_listening {
+                    html! {
+                        <a ref={&ctx.props().state_ref}>{state.action}</a>
+                    }
+                } else {
+                    html! {
+                        <a {onclick} ref={&ctx.props().state_ref}>
+                            {state.action}
+                        </a>
+                    }
+                }
+            }
+        }
+
+        let (link, el) = init::<Synchronous>();
 
         assert_count(&el, 0);
 
-        el.click();
+        click(&el);
         assert_count(&el, 1);
 
-        el.click();
+        click(&el);
         assert_count(&el, 2);
 
         link.send_message(Message::StopListening);
         scheduler::start_now();
 
-        el.click();
+        click(&el);
         assert_count(&el, 2);
     }
 
     #[test]
     async fn non_bubbling_event() {
+        #[derive(Default, PartialEq, Properties)]
         struct NonBubbling;
 
         impl Mixin for NonBubbling {
             fn view<C>(ctx: &Context<C>, state: &State) -> Html
             where
-                C: Component<Message = Message>,
+                C: Component<Message = Message, Properties = MixinProps<Self>>,
             {
                 let link = ctx.link().clone();
                 let onblur = Callback::from(move |_| {
@@ -452,7 +383,7 @@ mod tests {
                 });
                 html! {
                     <div>
-                        <a>
+                        <a ref={&ctx.props().state_ref}>
                             <input id="input" {onblur} type="text" />
                             {state.action}
                         </a>
@@ -461,7 +392,7 @@ mod tests {
             }
         }
 
-        let (_, el) = init::<NonBubbling>("a");
+        let (_, el) = init::<NonBubbling>();
 
         assert_count(&el, 0);
 
@@ -483,30 +414,27 @@ mod tests {
 
     #[test]
     fn bubbling() {
+        #[derive(Default, PartialEq, Properties)]
         struct Bubbling;
 
         impl Mixin for Bubbling {
             fn view<C>(ctx: &Context<C>, state: &State) -> Html
             where
-                C: Component<Message = Message>,
+                C: Component<Message = Message, Properties = MixinProps<Self>>,
             {
                 if state.stop_listening {
                     html! {
                         <div>
-                            <a>
+                            <a ref={&ctx.props().state_ref}>
                                 {state.action}
                             </a>
                         </div>
                     }
                 } else {
-                    let link = ctx.link().clone();
-                    let cb = Callback::from(move |_| {
-                        link.send_message(Message::Action);
-                        scheduler::start_now();
-                    });
+                    let cb = ctx.link().callback(|_| Message::Action);
                     html! {
                         <div onclick={cb.clone()}>
-                            <a onclick={cb}>
+                            <a onclick={cb} ref={&ctx.props().state_ref}>
                                 {state.action}
                             </a>
                         </div>
@@ -515,47 +443,39 @@ mod tests {
             }
         }
 
-        let (link, el) = init::<Bubbling>("a");
+        let (link, el) = init::<Bubbling>();
 
         assert_count(&el, 0);
-
-        el.click();
+        click(&el);
         assert_count(&el, 2);
-
-        el.click();
+        click(&el);
         assert_count(&el, 4);
 
         link.send_message(Message::StopListening);
         scheduler::start_now();
-        el.click();
+        click(&el);
         assert_count(&el, 4);
     }
 
     #[test]
     fn cancel_bubbling() {
+        #[derive(Default, PartialEq, Properties)]
         struct CancelBubbling;
 
         impl Mixin for CancelBubbling {
             fn view<C>(ctx: &Context<C>, state: &State) -> Html
             where
-                C: Component<Message = Message>,
+                C: Component<Message = Message, Properties = MixinProps<Self>>,
             {
-                let link = ctx.link().clone();
-                let onclick = Callback::from(move |_| {
-                    link.send_message(Message::Action);
-                    scheduler::start_now();
-                });
-
-                let link = ctx.link().clone();
-                let onclick2 = Callback::from(move |e: MouseEvent| {
+                let onclick = ctx.link().callback(|_| Message::Action);
+                let onclick2 = ctx.link().callback(|e: MouseEvent| {
                     e.stop_propagation();
-                    link.send_message(Message::Action);
-                    scheduler::start_now();
+                    Message::Action
                 });
 
                 html! {
                     <div onclick={onclick}>
-                        <a onclick={onclick2}>
+                        <a onclick={onclick2} ref={&ctx.props().state_ref}>
                             {state.action}
                         </a>
                     </div>
@@ -563,14 +483,12 @@ mod tests {
             }
         }
 
-        let (_, el) = init::<CancelBubbling>("a");
+        let (_, el) = init::<CancelBubbling>();
 
         assert_count(&el, 0);
-
-        el.click();
+        click(&el);
         assert_count(&el, 1);
-
-        el.click();
+        click(&el);
         assert_count(&el, 2);
     }
 
@@ -579,29 +497,23 @@ mod tests {
         // Here an event is being delivered to a DOM node which does
         // _not_ have a listener but which is contained within an
         // element that does and which cancels the bubble.
+        #[derive(Default, PartialEq, Properties)]
         struct CancelBubbling;
 
         impl Mixin for CancelBubbling {
             fn view<C>(ctx: &Context<C>, state: &State) -> Html
             where
-                C: Component<Message = Message>,
+                C: Component<Message = Message, Properties = MixinProps<Self>>,
             {
-                let link = ctx.link().clone();
-                let onclick = Callback::from(move |_| {
-                    link.send_message(Message::Action);
-                    scheduler::start_now();
-                });
-
-                let link = ctx.link().clone();
-                let onclick2 = Callback::from(move |e: MouseEvent| {
+                let onclick = ctx.link().callback(|_| Message::Action);
+                let onclick2 = ctx.link().callback(|e: MouseEvent| {
                     e.stop_propagation();
-                    link.send_message(Message::Action);
-                    scheduler::start_now();
+                    Message::Action
                 });
                 html! {
                     <div onclick={onclick}>
                         <div onclick={onclick2}>
-                            <a>
+                            <a ref={&ctx.props().state_ref}>
                                 {state.action}
                             </a>
                         </div>
@@ -610,65 +522,153 @@ mod tests {
             }
         }
 
-        let (_, el) = init::<CancelBubbling>("a");
+        let (_, el) = init::<CancelBubbling>();
 
         assert_count(&el, 0);
-
-        el.click();
+        click(&el);
         assert_count(&el, 1);
-
-        el.click();
+        click(&el);
         assert_count(&el, 2);
     }
 
+    /// Here an event is being delivered to a DOM node which is contained
+    /// in a portal. It should bubble through the portal and reach the containing
+    /// element.
+    #[test]
+    fn portal_bubbling() {
+        #[derive(PartialEq, Properties)]
+        struct PortalBubbling {
+            host: web_sys::Element,
+        }
+        impl Default for PortalBubbling {
+            fn default() -> Self {
+                let host = document().create_element("div").unwrap();
+                PortalBubbling { host }
+            }
+        }
+
+        impl Mixin for PortalBubbling {
+            fn view<C>(ctx: &Context<C>, state: &State) -> Html
+            where
+                C: Component<Message = Message, Properties = MixinProps<Self>>,
+            {
+                let portal_target = ctx.props().wrapped.host.clone();
+                let onclick = ctx.link().callback(|_| Message::Action);
+                html! {
+                    <>
+                        <div onclick={onclick}>
+                            {create_portal(html! {
+                                <a ref={&ctx.props().state_ref}>
+                                    {state.action}
+                                </a>
+                            }, portal_target.clone())}
+                        </div>
+                        {VNode::VRef(portal_target.into())}
+                    </>
+                }
+            }
+        }
+
+        let (_, el) = init::<PortalBubbling>();
+
+        assert_count(&el, 0);
+        click(&el);
+        assert_count(&el, 1);
+    }
+
+    /// Here an event is being from inside a shadow root. It should only be caught exactly once on each handler
+    #[test]
+    fn open_shadow_dom_bubbling() {
+        use web_sys::{ShadowRootInit, ShadowRootMode};
+        #[derive(PartialEq, Properties)]
+        struct OpenShadowDom {
+            host: web_sys::Element,
+            inner_root: web_sys::Element,
+        }
+        impl Default for OpenShadowDom {
+            fn default() -> Self {
+                let host = document().create_element("div").unwrap();
+                let inner_root = document().create_element("div").unwrap();
+                let shadow = host
+                    .attach_shadow(&ShadowRootInit::new(ShadowRootMode::Open))
+                    .unwrap();
+                shadow.append_child(&inner_root).unwrap();
+                OpenShadowDom { host, inner_root }
+            }
+        }
+        impl Mixin for OpenShadowDom {
+            fn view<C>(ctx: &Context<C>, state: &State) -> Html
+            where
+                C: Component<Message = Message, Properties = MixinProps<Self>>,
+            {
+                let onclick = ctx.link().callback(|_| Message::Action);
+                let mixin = &ctx.props().wrapped;
+                html! {
+                    <div onclick={onclick.clone()}>
+                        <div {onclick}>
+                            {create_portal(html! {
+                                <a ref={&ctx.props().state_ref}>
+                                    {state.action}
+                                </a>
+                            }, mixin.inner_root.clone())}
+                        </div>
+                        {VNode::VRef(mixin.host.clone().into())}
+                    </div>
+                }
+            }
+        }
+        let (_, el) = init::<OpenShadowDom>();
+
+        assert_count(&el, 0);
+        click(&el);
+        assert_count(&el, 2); // Once caught per handler
+    }
+
     fn test_input_listener<E>(make_event: impl Fn() -> E)
     where
-        E: JsCast + std::fmt::Debug,
+        E: Into<Event> + std::fmt::Debug,
     {
+        #[derive(Default, PartialEq, Properties)]
         struct Input;
 
         impl Mixin for Input {
             fn view<C>(ctx: &Context<C>, state: &State) -> Html
             where
-                C: Component<Message = Message>,
+                C: Component<Message = Message, Properties = MixinProps<Self>>,
             {
                 if state.stop_listening {
                     html! {
                         <div>
                             <input type="text" />
-                            <p>{state.text.clone()}</p>
+                            <p ref={&ctx.props().state_ref}>{state.text.clone()}</p>
                         </div>
                     }
                 } else {
-                    let link = ctx.link().clone();
-                    let onchange = Callback::from(move |e: web_sys::Event| {
+                    let onchange = ctx.link().callback(|e: web_sys::Event| {
                         let el: web_sys::HtmlInputElement = e.target_unchecked_into();
-                        link.send_message(Message::SetText(el.value()));
-                        scheduler::start_now();
+                        Message::SetText(el.value())
                     });
-
-                    let link = ctx.link().clone();
-                    let oninput = Callback::from(move |e: web_sys::InputEvent| {
+                    let oninput = ctx.link().callback(|e: web_sys::InputEvent| {
                         let el: web_sys::HtmlInputElement = e.target_unchecked_into();
-                        link.send_message(Message::SetText(el.value()));
-                        scheduler::start_now();
+                        Message::SetText(el.value())
                     });
 
                     html! {
                         <div>
                             <input type="text" {onchange} {oninput} />
-                            <p>{state.text.clone()}</p>
+                            <p ref={&ctx.props().state_ref}>{state.text.clone()}</p>
                         </div>
                     }
                 }
             }
         }
 
-        let (link, input_el) = init::<Input>("input");
-        let input_el = input_el.dyn_into::<web_sys::HtmlInputElement>().unwrap();
-        let p_el = get_el_by_tag("p");
+        let (link, state_ref) = init::<Input>();
+        let input_el = get_el_by_selector("input")
+            .dyn_into::<web_sys::HtmlInputElement>()
+            .unwrap();
 
-        assert_eq!(&p_el.text_content().unwrap(), "");
+        assert_eq!(&state_ref.get().unwrap().text_content().unwrap(), "");
         for mut s in ["foo", "bar", "baz"].iter() {
             input_el.set_value(s);
             if s == &"baz" {
@@ -677,12 +677,9 @@ mod tests {
 
                 s = &"bar";
             }
-            input_el
-                .dyn_ref::<web_sys::EventTarget>()
-                .unwrap()
-                .dispatch_event(&make_event().dyn_into().unwrap())
-                .unwrap();
-            assert_eq!(&p_el.text_content().unwrap(), s);
+            input_el.dispatch_event(&make_event().into()).unwrap();
+            scheduler::start_now();
+            assert_eq!(&state_ref.get().unwrap().text_content().unwrap(), s);
         }
     }
 
diff --git a/packages/yew/src/dom_bundle/btag/mod.rs b/packages/yew/src/dom_bundle/btag/mod.rs
index ed902baa1..c7a63f388 100644
--- a/packages/yew/src/dom_bundle/btag/mod.rs
+++ b/packages/yew/src/dom_bundle/btag/mod.rs
@@ -3,9 +3,9 @@
 mod attributes;
 mod listeners;
 
-pub use listeners::set_event_bubbling;
+pub use listeners::Registry;
 
-use super::{insert_node, BList, BNode, Reconcilable, ReconcileTarget};
+use super::{insert_node, BList, BNode, BSubtree, Reconcilable, ReconcileTarget};
 use crate::html::AnyScope;
 use crate::virtual_dom::vtag::{InputFields, VTagInner, Value, SVG_NAMESPACE};
 use crate::virtual_dom::{Attributes, Key, VTag};
@@ -25,10 +25,10 @@ trait Apply {
     type Bundle;
 
     /// Apply contained values to [Element](Self::Element) with no ancestor
-    fn apply(self, el: &Self::Element) -> Self::Bundle;
+    fn apply(self, root: &BSubtree, el: &Self::Element) -> Self::Bundle;
 
     /// Apply diff between [self] and `bundle` to [Element](Self::Element).
-    fn apply_diff(self, el: &Self::Element, bundle: &mut Self::Bundle);
+    fn apply_diff(self, root: &BSubtree, el: &Self::Element, bundle: &mut Self::Bundle);
 }
 
 /// [BTag] fields that are specific to different [BTag] kinds.
@@ -69,14 +69,14 @@ pub(super) struct BTag {
 }
 
 impl ReconcileTarget for BTag {
-    fn detach(self, parent: &Element, parent_to_detach: bool) {
-        self.listeners.unregister();
+    fn detach(self, root: &BSubtree, parent: &Element, parent_to_detach: bool) {
+        self.listeners.unregister(root);
 
         let node = self.reference;
         // recursively remove its children
         if let BTagInner::Other { child_bundle, .. } = self.inner {
             // This tag will be removed, so there's no point to remove any child.
-            child_bundle.detach(&node, true);
+            child_bundle.detach(root, &node, true);
         }
         if !parent_to_detach {
             let result = parent.remove_child(&node);
@@ -104,6 +104,7 @@ impl Reconcilable for VTag {
 
     fn attach(
         self,
+        root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
@@ -118,20 +119,21 @@ impl Reconcilable for VTag {
         } = self;
         insert_node(&el, parent, next_sibling.get().as_ref());
 
-        let attributes = attributes.apply(&el);
-        let listeners = listeners.apply(&el);
+        let attributes = attributes.apply(root, &el);
+        let listeners = listeners.apply(root, &el);
 
         let inner = match self.inner {
             VTagInner::Input(f) => {
-                let f = f.apply(el.unchecked_ref());
+                let f = f.apply(root, el.unchecked_ref());
                 BTagInner::Input(f)
             }
             VTagInner::Textarea { value } => {
-                let value = value.apply(el.unchecked_ref());
+                let value = value.apply(root, el.unchecked_ref());
                 BTagInner::Textarea { value }
             }
             VTagInner::Other { children, tag } => {
-                let (_, child_bundle) = children.attach(parent_scope, &el, NodeRef::default());
+                let (_, child_bundle) =
+                    children.attach(root, parent_scope, &el, NodeRef::default());
                 BTagInner::Other { child_bundle, tag }
             }
         };
@@ -151,6 +153,7 @@ impl Reconcilable for VTag {
 
     fn reconcile_node(
         self,
+        root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
@@ -173,31 +176,38 @@ impl Reconcilable for VTag {
                     }
                     _ => false,
                 } {
-                    return self.reconcile(parent_scope, parent, next_sibling, ex.deref_mut());
+                    return self.reconcile(
+                        root,
+                        parent_scope,
+                        parent,
+                        next_sibling,
+                        ex.deref_mut(),
+                    );
                 }
             }
             _ => {}
         };
-        self.replace(parent_scope, parent, next_sibling, bundle)
+        self.replace(root, parent_scope, parent, next_sibling, bundle)
     }
 
     fn reconcile(
         self,
+        root: &BSubtree,
         parent_scope: &AnyScope,
         _parent: &Element,
         _next_sibling: NodeRef,
         tag: &mut Self::Bundle,
     ) -> NodeRef {
         let el = &tag.reference;
-        self.attributes.apply_diff(el, &mut tag.attributes);
-        self.listeners.apply_diff(el, &mut tag.listeners);
+        self.attributes.apply_diff(root, el, &mut tag.attributes);
+        self.listeners.apply_diff(root, el, &mut tag.listeners);
 
         match (self.inner, &mut tag.inner) {
             (VTagInner::Input(new), BTagInner::Input(old)) => {
-                new.apply_diff(el.unchecked_ref(), old);
+                new.apply_diff(root, el.unchecked_ref(), old);
             }
             (VTagInner::Textarea { value: new }, BTagInner::Textarea { value: old }) => {
-                new.apply_diff(el.unchecked_ref(), old);
+                new.apply_diff(root, el.unchecked_ref(), old);
             }
             (
                 VTagInner::Other { children: new, .. },
@@ -205,7 +215,7 @@ impl Reconcilable for VTag {
                     child_bundle: old, ..
                 },
             ) => {
-                new.reconcile(parent_scope, el, NodeRef::default(), old);
+                new.reconcile(root, parent_scope, el, NodeRef::default(), old);
             }
             // Can not happen, because we checked for tag equability above
             _ => unsafe { unreachable_unchecked() },
@@ -295,8 +305,14 @@ mod tests {
 
     wasm_bindgen_test_configure!(run_in_browser);
 
-    fn test_scope() -> AnyScope {
-        AnyScope::test()
+    fn setup_parent() -> (BSubtree, AnyScope, Element) {
+        let scope = AnyScope::test();
+        let parent = document().create_element("div").unwrap();
+        let root = BSubtree::create_root(&parent);
+
+        document().body().unwrap().append_child(&parent).unwrap();
+
+        (root, scope, parent)
     }
 
     #[test]
@@ -475,10 +491,9 @@ mod tests {
 
     #[test]
     fn supports_svg() {
+        let (root, scope, parent) = setup_parent();
         let document = web_sys::window().unwrap().document().unwrap();
 
-        let scope = test_scope();
-        let div_el = document.create_element("div").unwrap();
         let namespace = SVG_NAMESPACE;
         let namespace = Some(namespace);
         let svg_el = document.create_element_ns(namespace, "svg").unwrap();
@@ -488,17 +503,17 @@ mod tests {
         let svg_node = html! { <svg>{path_node}</svg> };
 
         let svg_tag = assert_vtag(svg_node);
-        let (_, svg_tag) = svg_tag.attach(&scope, &div_el, NodeRef::default());
+        let (_, svg_tag) = svg_tag.attach(&root, &scope, &parent, NodeRef::default());
         assert_namespace(&svg_tag, SVG_NAMESPACE);
         let path_tag = assert_btag_ref(svg_tag.children().get(0).unwrap());
         assert_namespace(path_tag, SVG_NAMESPACE);
 
         let g_tag = assert_vtag(g_node.clone());
-        let (_, g_tag) = g_tag.attach(&scope, &div_el, NodeRef::default());
+        let (_, g_tag) = g_tag.attach(&root, &scope, &parent, NodeRef::default());
         assert_namespace(&g_tag, HTML_NAMESPACE);
 
         let g_tag = assert_vtag(g_node);
-        let (_, g_tag) = g_tag.attach(&scope, &svg_el, NodeRef::default());
+        let (_, g_tag) = g_tag.attach(&root, &scope, &svg_el, NodeRef::default());
         assert_namespace(&g_tag, SVG_NAMESPACE);
     }
 
@@ -594,26 +609,20 @@ mod tests {
 
     #[test]
     fn it_does_not_set_missing_class_name() {
-        let scope = test_scope();
-        let parent = document().create_element("div").unwrap();
-
-        document().body().unwrap().append_child(&parent).unwrap();
+        let (root, scope, parent) = setup_parent();
 
         let elem = html! { <div></div> };
-        let (_, mut elem) = Reconcilable::attach(elem, &scope, &parent, NodeRef::default());
+        let (_, mut elem) = elem.attach(&root, &scope, &parent, NodeRef::default());
         let vtag = assert_btag_mut(&mut elem);
         // test if the className has not been set
         assert!(!vtag.reference().has_attribute("class"));
     }
 
     fn test_set_class_name(gen_html: impl FnOnce() -> Html) {
-        let scope = test_scope();
-        let parent = document().create_element("div").unwrap();
-
-        document().body().unwrap().append_child(&parent).unwrap();
+        let (root, scope, parent) = setup_parent();
 
         let elem = gen_html();
-        let (_, mut elem) = Reconcilable::attach(elem, &scope, &parent, NodeRef::default());
+        let (_, mut elem) = elem.attach(&root, &scope, &parent, NodeRef::default());
         let vtag = assert_btag_mut(&mut elem);
         // test if the className has been set
         assert!(vtag.reference().has_attribute("class"));
@@ -631,16 +640,13 @@ mod tests {
 
     #[test]
     fn controlled_input_synced() {
-        let scope = test_scope();
-        let parent = document().create_element("div").unwrap();
-
-        document().body().unwrap().append_child(&parent).unwrap();
+        let (root, scope, parent) = setup_parent();
 
         let expected = "not_changed_value";
 
         // Initial state
         let elem = html! { <input value={expected} /> };
-        let (_, mut elem) = Reconcilable::attach(elem, &scope, &parent, NodeRef::default());
+        let (_, mut elem) = elem.attach(&root, &scope, &parent, NodeRef::default());
         let vtag = assert_btag_ref(&elem);
 
         // User input
@@ -652,7 +658,7 @@ mod tests {
         let elem_vtag = assert_vtag(next_elem);
 
         // Sync happens here
-        elem_vtag.reconcile_node(&scope, &parent, NodeRef::default(), &mut elem);
+        elem_vtag.reconcile_node(&root, &scope, &parent, NodeRef::default(), &mut elem);
         let vtag = assert_btag_ref(&elem);
 
         // Get new current value of the input element
@@ -667,14 +673,11 @@ mod tests {
 
     #[test]
     fn uncontrolled_input_unsynced() {
-        let scope = test_scope();
-        let parent = document().create_element("div").unwrap();
-
-        document().body().unwrap().append_child(&parent).unwrap();
+        let (root, scope, parent) = setup_parent();
 
         // Initial state
         let elem = html! { <input /> };
-        let (_, mut elem) = Reconcilable::attach(elem, &scope, &parent, NodeRef::default());
+        let (_, mut elem) = elem.attach(&root, &scope, &parent, NodeRef::default());
         let vtag = assert_btag_ref(&elem);
 
         // User input
@@ -686,7 +689,7 @@ mod tests {
         let elem_vtag = assert_vtag(next_elem);
 
         // Value should not be refreshed
-        elem_vtag.reconcile_node(&scope, &parent, NodeRef::default(), &mut elem);
+        elem_vtag.reconcile_node(&root, &scope, &parent, NodeRef::default(), &mut elem);
         let vtag = assert_btag_ref(&elem);
 
         // Get user value of the input element
@@ -705,10 +708,7 @@ mod tests {
 
     #[test]
     fn dynamic_tags_work() {
-        let scope = test_scope();
-        let parent = document().create_element("div").unwrap();
-
-        document().body().unwrap().append_child(&parent).unwrap();
+        let (root, scope, parent) = setup_parent();
 
         let elem = html! { <@{
             let mut builder = String::new();
@@ -716,7 +716,7 @@ mod tests {
             builder
         }/> };
 
-        let (_, mut elem) = Reconcilable::attach(elem, &scope, &parent, NodeRef::default());
+        let (_, mut elem) = elem.attach(&root, &scope, &parent, NodeRef::default());
         let vtag = assert_btag_mut(&mut elem);
         // make sure the new tag name is used internally
         assert_eq!(vtag.tag(), "a");
@@ -758,36 +758,31 @@ mod tests {
 
     #[test]
     fn reset_node_ref() {
-        let scope = test_scope();
-        let parent = document().create_element("div").unwrap();
-
-        document().body().unwrap().append_child(&parent).unwrap();
+        let (root, scope, parent) = setup_parent();
 
         let node_ref = NodeRef::default();
         let elem: VNode = html! { <div ref={node_ref.clone()}></div> };
         assert_vtag_ref(&elem);
-        let (_, elem) = elem.attach(&scope, &parent, NodeRef::default());
+        let (_, elem) = elem.attach(&root, &scope, &parent, NodeRef::default());
         assert_eq!(node_ref.get(), parent.first_child());
-        elem.detach(&parent, false);
+        elem.detach(&root, &parent, false);
         assert!(node_ref.get().is_none());
     }
 
     #[test]
     fn vtag_reuse_should_reset_ancestors_node_ref() {
-        let scope = test_scope();
-        let parent = document().create_element("div").unwrap();
-        document().body().unwrap().append_child(&parent).unwrap();
+        let (root, scope, parent) = setup_parent();
 
         let node_ref_a = NodeRef::default();
         let elem_a = html! { <div id="a" ref={node_ref_a.clone()} /> };
-        let (_, mut elem) = elem_a.attach(&scope, &parent, NodeRef::default());
+        let (_, mut elem) = elem_a.attach(&root, &scope, &parent, NodeRef::default());
 
         // save the Node to check later that it has been reused.
         let node_a = node_ref_a.get().unwrap();
 
         let node_ref_b = NodeRef::default();
         let elem_b = html! { <div id="b" ref={node_ref_b.clone()} /> };
-        elem_b.reconcile_node(&scope, &parent, NodeRef::default(), &mut elem);
+        elem_b.reconcile_node(&root, &scope, &parent, NodeRef::default(), &mut elem);
 
         let node_b = node_ref_b.get().unwrap();
 
@@ -800,9 +795,7 @@ mod tests {
 
     #[test]
     fn vtag_should_not_touch_newly_bound_refs() {
-        let scope = test_scope();
-        let parent = document().create_element("div").unwrap();
-        document().body().unwrap().append_child(&parent).unwrap();
+        let (root, scope, parent) = setup_parent();
 
         let test_ref = NodeRef::default();
         let before = html! {
@@ -819,8 +812,8 @@ mod tests {
         // The point of this diff is to first render the "after" div and then detach the "before" div,
         // while both should be bound to the same node ref
 
-        let (_, mut elem) = before.attach(&scope, &parent, NodeRef::default());
-        after.reconcile_node(&scope, &parent, NodeRef::default(), &mut elem);
+        let (_, mut elem) = before.attach(&root, &scope, &parent, NodeRef::default());
+        after.reconcile_node(&root, &scope, &parent, NodeRef::default(), &mut elem);
 
         assert_eq!(
             test_ref
diff --git a/packages/yew/src/dom_bundle/btext.rs b/packages/yew/src/dom_bundle/btext.rs
index 51c54f0a4..969ce3eef 100644
--- a/packages/yew/src/dom_bundle/btext.rs
+++ b/packages/yew/src/dom_bundle/btext.rs
@@ -1,6 +1,6 @@
 //! This module contains the bundle implementation of text [BText].
 
-use super::{insert_node, BNode, Reconcilable, ReconcileTarget};
+use super::{insert_node, BNode, BSubtree, Reconcilable, ReconcileTarget};
 use crate::html::AnyScope;
 use crate::virtual_dom::{AttrValue, VText};
 use crate::NodeRef;
@@ -15,7 +15,7 @@ pub(super) struct BText {
 }
 
 impl ReconcileTarget for BText {
-    fn detach(self, parent: &Element, parent_to_detach: bool) {
+    fn detach(self, _root: &BSubtree, parent: &Element, parent_to_detach: bool) {
         if !parent_to_detach {
             let result = parent.remove_child(&self.text_node);
 
@@ -39,6 +39,7 @@ impl Reconcilable for VText {
 
     fn attach(
         self,
+        _root: &BSubtree,
         _parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
@@ -53,18 +54,21 @@ impl Reconcilable for VText {
     /// Renders virtual node over existing `TextNode`, but only if value of text has changed.
     fn reconcile_node(
         self,
+        root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
         bundle: &mut BNode,
     ) -> NodeRef {
         match bundle {
-            BNode::Text(btext) => self.reconcile(parent_scope, parent, next_sibling, btext),
-            _ => self.replace(parent_scope, parent, next_sibling, bundle),
+            BNode::Text(btext) => self.reconcile(root, parent_scope, parent, next_sibling, btext),
+            _ => self.replace(root, parent_scope, parent, next_sibling, bundle),
         }
     }
+
     fn reconcile(
         self,
+        _root: &BSubtree,
         _parent_scope: &AnyScope,
         _parent: &Element,
         _next_sibling: NodeRef,
diff --git a/packages/yew/src/dom_bundle/mod.rs b/packages/yew/src/dom_bundle/mod.rs
index b1aa8da30..16df0b97d 100644
--- a/packages/yew/src/dom_bundle/mod.rs
+++ b/packages/yew/src/dom_bundle/mod.rs
@@ -12,11 +12,12 @@ mod bportal;
 mod bsuspense;
 mod btag;
 mod btext;
+mod subtree_root;
+
 mod traits;
 mod utils;
 
-use gloo::utils::document;
-use web_sys::{Element, Node};
+use web_sys::Element;
 
 use crate::html::AnyScope;
 use crate::html::NodeRef;
@@ -27,13 +28,16 @@ use blist::BList;
 use bnode::BNode;
 use bportal::BPortal;
 use bsuspense::BSuspense;
-use btag::BTag;
+use btag::{BTag, Registry};
 use btext::BText;
+use subtree_root::EventDescriptor;
 use traits::{Reconcilable, ReconcileTarget};
 use utils::{insert_node, test_log};
 
 #[doc(hidden)] // Publically exported from crate::events
-pub use self::btag::set_event_bubbling;
+pub use subtree_root::set_event_bubbling;
+
+pub(crate) use subtree_root::BSubtree;
 
 /// A Bundle.
 ///
@@ -46,11 +50,8 @@ pub(crate) struct Bundle(BNode);
 
 impl Bundle {
     /// Creates a new bundle.
-    pub fn new(parent: &Element, next_sibling: &NodeRef, node_ref: &NodeRef) -> Self {
-        let placeholder: Node = document().create_text_node("").into();
-        insert_node(&placeholder, parent, next_sibling.get().as_ref());
-        node_ref.set(Some(placeholder.clone()));
-        Self(BNode::Ref(placeholder))
+    pub const fn new() -> Self {
+        Self(BNode::List(BList::new()))
     }
 
     /// Shifts the bundle into a different position.
@@ -61,16 +62,17 @@ impl Bundle {
     /// Applies a virtual dom layout to current bundle.
     pub fn reconcile(
         &mut self,
+        root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
         next_node: VNode,
     ) -> NodeRef {
-        next_node.reconcile_node(parent_scope, parent, next_sibling, &mut self.0)
+        next_node.reconcile_node(root, parent_scope, parent, next_sibling, &mut self.0)
     }
 
     /// Detaches current bundle.
-    pub fn detach(self, parent: &Element, parent_to_detach: bool) {
-        self.0.detach(parent, parent_to_detach);
+    pub fn detach(self, root: &BSubtree, parent: &Element, parent_to_detach: bool) {
+        self.0.detach(root, parent, parent_to_detach);
     }
 }
diff --git a/packages/yew/src/dom_bundle/subtree_root.rs b/packages/yew/src/dom_bundle/subtree_root.rs
new file mode 100644
index 000000000..34b8e007b
--- /dev/null
+++ b/packages/yew/src/dom_bundle/subtree_root.rs
@@ -0,0 +1,476 @@
+//! Per-subtree state of apps
+
+use super::{test_log, Registry};
+use crate::virtual_dom::{Listener, ListenerKind};
+use gloo::events::{EventListener, EventListenerOptions, EventListenerPhase};
+use std::cell::RefCell;
+use std::collections::HashSet;
+use std::hash::{Hash, Hasher};
+use std::rc::{Rc, Weak};
+use std::sync::atomic::{AtomicBool, AtomicU32, Ordering};
+use wasm_bindgen::prelude::wasm_bindgen;
+use wasm_bindgen::JsCast;
+use web_sys::{Element, Event, EventTarget as HtmlEventTarget};
+
+/// DOM-Types that capture (bubbling) events. This generally includes event targets,
+/// but also subtree roots.
+pub trait EventGrating {
+    fn subtree_id(&self) -> Option<TreeId>;
+    fn set_subtree_id(&self, tree_id: TreeId);
+    // When caching, we key on the length of the `composed_path`. Important to check
+    // considering event retargeting!
+    fn cache_key(&self) -> Option<u32>;
+    fn set_cache_key(&self, key: u32);
+}
+
+#[wasm_bindgen]
+extern "C" {
+    // Duck-typing, not a real class on js-side. On rust-side, use impls of EventGrating below
+    type EventTargetable;
+    #[wasm_bindgen(method, getter = __yew_subtree_id, structural)]
+    fn subtree_id(this: &EventTargetable) -> Option<TreeId>;
+    #[wasm_bindgen(method, setter = __yew_subtree_id, structural)]
+    fn set_subtree_id(this: &EventTargetable, id: TreeId);
+    #[wasm_bindgen(method, getter = __yew_subtree_cache_key, structural)]
+    fn cache_key(this: &EventTargetable) -> Option<u32>;
+    #[wasm_bindgen(method, setter = __yew_subtree_cache_key, structural)]
+    fn set_cache_key(this: &EventTargetable, key: u32);
+}
+
+macro_rules! impl_event_grating {
+    ($($t:ty);* $(;)?) => {
+        $(
+            impl EventGrating for $t {
+                fn subtree_id(&self) -> Option<TreeId> {
+                    self.unchecked_ref::<EventTargetable>().subtree_id()
+                }
+                fn set_subtree_id(&self, tree_id: TreeId) {
+                    self.unchecked_ref::<EventTargetable>()
+                        .set_subtree_id(tree_id);
+                }
+                fn cache_key(&self) -> Option<u32> {
+                    self.unchecked_ref::<EventTargetable>().cache_key()
+                }
+                fn set_cache_key(&self, key: u32) {
+                    self.unchecked_ref::<EventTargetable>().set_cache_key(key)
+                }
+            }
+        )*
+    }
+}
+
+impl_event_grating!(
+    HtmlEventTarget;
+    Event; // We cache the found subtree id on the event. This should speed up repeated searches
+);
+
+/// The TreeId is the additional payload attached to each listening element
+/// It identifies the host responsible for the target. Events not matching
+/// are ignored during handling
+type TreeId = u32;
+
+/// Special id for caching the fact that some event should not be handled
+static NONE_TREE_ID: TreeId = 0;
+static NEXT_ROOT_ID: AtomicU32 = AtomicU32::new(1);
+
+fn next_root_id() -> TreeId {
+    NEXT_ROOT_ID.fetch_add(1, Ordering::SeqCst)
+}
+
+/// Data kept per controlled subtree. [Portal] and [AppHandle] serve as
+/// hosts. Two controlled subtrees should never overlap.
+///
+/// [Portal]: super::bportal::BPortal
+/// [AppHandle]: super::app_handle::AppHandle
+#[derive(Debug, Clone)]
+pub struct BSubtree(Rc<SubtreeData>);
+
+/// The parent is the logical location where a subtree is mounted
+/// Used to bubble events through portals, which are physically somewhere else in the DOM tree
+/// but should bubble to logical ancestors in the virtual DOM tree
+#[derive(Debug)]
+struct ParentingInformation {
+    parent_root: Rc<SubtreeData>,
+    // Logical parent of the subtree. Might be the host element of another subtree,
+    // if mounted as a direct child, or a controlled element.
+    mount_element: Element,
+}
+
+#[derive(Clone, Hash, Eq, PartialEq, Debug)]
+pub struct EventDescriptor {
+    kind: ListenerKind,
+    passive: bool,
+}
+
+impl From<&dyn Listener> for EventDescriptor {
+    fn from(l: &dyn Listener) -> Self {
+        Self {
+            kind: l.kind(),
+            passive: l.passive(),
+        }
+    }
+}
+
+/// Ensures event handler registration.
+//
+// Separate struct to DRY, while avoiding partial struct mutability.
+#[derive(Debug)]
+struct HostHandlers {
+    /// The host element where events are registered
+    host: HtmlEventTarget,
+
+    /// Keep track of all listeners to drop them on registry drop.
+    /// The registry is never dropped in production.
+    #[cfg(test)]
+    registered: Vec<(ListenerKind, EventListener)>,
+}
+
+impl HostHandlers {
+    fn new(host: HtmlEventTarget) -> Self {
+        Self {
+            host,
+            #[cfg(test)]
+            registered: Vec::default(),
+        }
+    }
+
+    fn add_listener(&mut self, desc: &EventDescriptor, callback: impl 'static + FnMut(&Event)) {
+        let cl = {
+            let desc = desc.clone();
+            let options = EventListenerOptions {
+                phase: EventListenerPhase::Capture,
+                passive: desc.passive,
+            };
+            EventListener::new_with_options(&self.host, desc.kind.type_name(), options, callback)
+        };
+
+        // Never drop the closure as this event handler is static
+        #[cfg(not(test))]
+        cl.forget();
+        #[cfg(test)]
+        self.registered.push((desc.kind.clone(), cl));
+    }
+}
+
+/// Per subtree data
+#[derive(Debug)]
+struct SubtreeData {
+    /// Data shared between all trees in an app
+    app_data: Rc<RefCell<AppData>>,
+    /// Parent subtree
+    parent: Option<ParentingInformation>,
+
+    subtree_id: TreeId,
+    host: HtmlEventTarget,
+    event_registry: RefCell<Registry>,
+    global: RefCell<HostHandlers>,
+}
+
+#[derive(Debug)]
+struct WeakSubtree {
+    subtree_id: TreeId,
+    weak_ref: Weak<SubtreeData>,
+}
+
+impl Hash for WeakSubtree {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.subtree_id.hash(state)
+    }
+}
+
+impl PartialEq for WeakSubtree {
+    fn eq(&self, other: &Self) -> bool {
+        self.subtree_id == other.subtree_id
+    }
+}
+impl Eq for WeakSubtree {}
+
+/// Per tree data, shared between all subtrees in the hierarchy
+#[derive(Debug, Default)]
+struct AppData {
+    subtrees: HashSet<WeakSubtree>,
+    listening: HashSet<EventDescriptor>,
+}
+
+impl AppData {
+    fn add_subtree(&mut self, subtree: &Rc<SubtreeData>) {
+        for event in self.listening.iter() {
+            subtree.add_listener(event);
+        }
+        self.subtrees.insert(WeakSubtree {
+            subtree_id: subtree.subtree_id,
+            weak_ref: Rc::downgrade(subtree),
+        });
+    }
+    fn ensure_handled(&mut self, desc: &EventDescriptor) {
+        if !self.listening.insert(desc.clone()) {
+            return;
+        }
+        self.subtrees.retain(|subtree| {
+            if let Some(subtree) = subtree.weak_ref.upgrade() {
+                subtree.add_listener(desc);
+                true
+            } else {
+                false
+            }
+        })
+    }
+}
+
+/// Bubble events during delegation
+static BUBBLE_EVENTS: AtomicBool = AtomicBool::new(true);
+
+/// Set, if events should bubble up the DOM tree, calling any matching callbacks.
+///
+/// Bubbling is enabled by default. Disabling bubbling can lead to substantial improvements in event
+/// handling performance.
+///
+/// Note that yew uses event delegation and implements internal even bubbling for performance
+/// reasons. Calling `Event.stopPropagation()` or `Event.stopImmediatePropagation()` in the event
+/// handler has no effect.
+///
+/// This function should be called before any component is mounted.
+#[cfg_attr(documenting, doc(cfg(feature = "csr")))]
+pub fn set_event_bubbling(bubble: bool) {
+    BUBBLE_EVENTS.store(bubble, Ordering::Relaxed);
+}
+
+struct BrandingSearchResult {
+    branding: TreeId,
+    closest_branded_ancestor: Element,
+}
+
+/// Deduce the subtree an element is part of. This already partially starts the bubbling
+/// process, as long as no listeners are encountered.
+/// Subtree roots are always branded with their own subtree id.
+fn find_closest_branded_element(mut el: Element, do_bubble: bool) -> Option<BrandingSearchResult> {
+    if !do_bubble {
+        let branding = el.subtree_id()?;
+        Some(BrandingSearchResult {
+            branding,
+            closest_branded_ancestor: el,
+        })
+    } else {
+        let responsible_tree_id = loop {
+            if let Some(tree_id) = el.subtree_id() {
+                break tree_id;
+            }
+            el = el.parent_element()?;
+        };
+        Some(BrandingSearchResult {
+            branding: responsible_tree_id,
+            closest_branded_ancestor: el,
+        })
+    }
+}
+
+/// Iterate over all potentially listening elements in bubbling order.
+/// If bubbling is turned off, yields at most a single element.
+fn start_bubbling_from(
+    subtree: &SubtreeData,
+    root_or_listener: Element,
+    should_bubble: bool,
+) -> impl '_ + Iterator<Item = (&'_ SubtreeData, Element)> {
+    let start = subtree.bubble_to_inner_element(root_or_listener, should_bubble);
+
+    std::iter::successors(start, move |(subtree, element)| {
+        if !should_bubble {
+            return None;
+        }
+        let parent = element.parent_element()?;
+        subtree.bubble_to_inner_element(parent, true)
+    })
+}
+
+impl SubtreeData {
+    fn new_ref(host_element: &HtmlEventTarget, parent: Option<ParentingInformation>) -> Rc<Self> {
+        let tree_root_id = next_root_id();
+        let event_registry = Registry::new();
+        let host_handlers = HostHandlers::new(host_element.clone());
+        let app_data = match parent {
+            Some(ref parent) => parent.parent_root.app_data.clone(),
+            None => Rc::default(),
+        };
+        let subtree = Rc::new(SubtreeData {
+            parent,
+            app_data,
+
+            subtree_id: tree_root_id,
+            host: host_element.clone(),
+            event_registry: RefCell::new(event_registry),
+            global: RefCell::new(host_handlers),
+        });
+        subtree.app_data.borrow_mut().add_subtree(&subtree);
+        subtree
+    }
+
+    fn event_registry(&self) -> &RefCell<Registry> {
+        &self.event_registry
+    }
+
+    fn host_handlers(&self) -> &RefCell<HostHandlers> {
+        &self.global
+    }
+
+    // Bubble a potential parent until it reaches an internal element
+    fn bubble_to_inner_element(
+        &self,
+        parent_el: Element,
+        should_bubble: bool,
+    ) -> Option<(&Self, Element)> {
+        let mut next_subtree = self;
+        let mut next_el = parent_el;
+        if !should_bubble && next_subtree.host.eq(&next_el) {
+            return None;
+        }
+        while next_subtree.host.eq(&next_el) {
+            // we've reached the host, delegate to a parent if one exists
+            let parent = next_subtree.parent.as_ref()?;
+            next_subtree = &parent.parent_root;
+            next_el = parent.mount_element.clone();
+        }
+        Some((next_subtree, next_el))
+    }
+
+    fn start_bubbling_if_responsible<'s>(
+        &'s self,
+        event: &'s Event,
+    ) -> Option<impl 's + Iterator<Item = (&'s SubtreeData, Element)>> {
+        // Note: the event is not necessarily indentically the same object for all installed handlers
+        // hence this cache can be unreliable. Hence the cached repsonsible_tree_id might be missing.
+        // On the other hand, due to event retargeting at shadow roots, the cache might be wrong!
+        // Keep in mind that we handle events in the capture phase, so top-down. When descending and
+        // retargeting into closed shadow-dom, the event might have been handled 'prematurely'.
+        // TODO: figure out how to prevent this and establish correct event handling for closed shadow root.
+        // Note: Other frameworks also get this wrong and dispatch such events multiple times.
+        let event_path = event.composed_path();
+        let derived_cached_key = event_path.length();
+        let cached_branding = if matches!(event.cache_key(), Some(cache_key) if cache_key == derived_cached_key)
+        {
+            event.subtree_id()
+        } else {
+            None
+        };
+        if matches!(cached_branding, Some(responsible_tree_id) if responsible_tree_id != self.subtree_id)
+        {
+            // some other handler has determined (via this function, but other `self`) a subtree that is
+            // responsible for handling this event, and it's not this subtree.
+            return None;
+        }
+        // We're tasked with finding the subtree that is reponsible with handling the event, and/or
+        // run the handling if that's `self`.
+        let target = event_path.get(0).dyn_into::<Element>().ok()?;
+        let should_bubble = BUBBLE_EVENTS.load(Ordering::Relaxed);
+        // We say that the most deeply nested subtree is "responsible" for handling the event.
+        let (responsible_tree_id, bubbling_start) = if let Some(branding) = cached_branding {
+            (branding, target.clone())
+        } else if let Some(branding) = find_closest_branded_element(target.clone(), should_bubble) {
+            let BrandingSearchResult {
+                branding,
+                closest_branded_ancestor,
+            } = branding;
+            event.set_subtree_id(branding);
+            event.set_cache_key(derived_cached_key);
+            (branding, closest_branded_ancestor)
+        } else {
+            // Possible only? if bubbling is disabled
+            // No tree should handle this event
+            event.set_subtree_id(NONE_TREE_ID);
+            event.set_cache_key(derived_cached_key);
+            return None;
+        };
+        if self.subtree_id != responsible_tree_id {
+            return None;
+        }
+        if self.host.eq(&target) {
+            // One more special case: don't handle events that get fired directly on a subtree host
+            return None;
+        }
+        Some(start_bubbling_from(self, bubbling_start, should_bubble))
+        // # More details: When nesting occurs
+        //
+        // Event listeners are installed only on the subtree roots. Still, those roots can
+        // nest. This could lead to events getting handled multiple times. We want event handling to start
+        // at the most deeply nested subtree.
+        //
+        // A nested subtree portals into an element that is controlled by the user and rendered
+        // with VNode::VRef. We get the following dom nesting:
+        //
+        // AppRoot > .. > UserControlledVRef > .. > NestedTree(PortalExit) > ..
+        // --------------                          ----------------------------
+        // The underlined parts of the hierarchy are controlled by Yew.
+        //
+        // from the following virtual_dom
+        // <AppRoot>
+        //   {VNode::VRef(<div><div id="portal_target" /></div>)}
+        //   {create_portal(<NestedTree />, #portal_target)}
+        // </AppRoot>
+    }
+    /// Handle a global event firing
+    fn handle(&self, desc: EventDescriptor, event: Event) {
+        let run_handler = |root: &Self, el: &Element| {
+            let handler = Registry::get_handler(root.event_registry(), el, &desc);
+            if let Some(handler) = handler {
+                handler(&event)
+            }
+        };
+        if let Some(bubbling_it) = self.start_bubbling_if_responsible(&event) {
+            test_log!("Running handler on subtree {}", self.subtree_id);
+            for (subtree, el) in bubbling_it {
+                if event.cancel_bubble() {
+                    break;
+                }
+                run_handler(subtree, &el);
+            }
+        }
+    }
+    fn add_listener(self: &Rc<Self>, desc: &EventDescriptor) {
+        let this = self.clone();
+        let listener = {
+            let desc = desc.clone();
+            move |e: &Event| {
+                this.handle(desc.clone(), e.clone());
+            }
+        };
+        self.host_handlers()
+            .borrow_mut()
+            .add_listener(desc, listener);
+    }
+}
+
+impl BSubtree {
+    fn do_create_root(
+        host_element: &HtmlEventTarget,
+        parent: Option<ParentingInformation>,
+    ) -> Self {
+        let shared_inner = SubtreeData::new_ref(host_element, parent);
+        let root = BSubtree(shared_inner);
+        root.brand_element(host_element);
+        root
+    }
+    /// Create a bundle root at the specified host element
+    pub fn create_root(host_element: &HtmlEventTarget) -> Self {
+        Self::do_create_root(host_element, None)
+    }
+    /// Create a bundle root at the specified host element, that is logically
+    /// mounted under the specified element in this tree.
+    pub fn create_subroot(&self, mount_point: Element, host_element: &HtmlEventTarget) -> Self {
+        let parent_information = ParentingInformation {
+            parent_root: self.0.clone(),
+            mount_element: mount_point,
+        };
+        Self::do_create_root(host_element, Some(parent_information))
+    }
+    /// Ensure the event described is handled on all subtrees
+    pub fn ensure_handled(&self, desc: &EventDescriptor) {
+        self.0.app_data.borrow_mut().ensure_handled(desc);
+    }
+    /// Run f with access to global Registry
+    #[inline]
+    pub fn with_listener_registry<R>(&self, f: impl FnOnce(&mut Registry) -> R) -> R {
+        f(&mut *self.0.event_registry().borrow_mut())
+    }
+    pub fn brand_element(&self, el: &dyn EventGrating) {
+        el.set_subtree_id(self.0.subtree_id);
+    }
+}
diff --git a/packages/yew/src/dom_bundle/traits.rs b/packages/yew/src/dom_bundle/traits.rs
index a3873da9b..a9c1639e9 100644
--- a/packages/yew/src/dom_bundle/traits.rs
+++ b/packages/yew/src/dom_bundle/traits.rs
@@ -1,6 +1,5 @@
-use super::BNode;
-use crate::html::AnyScope;
-use crate::html::NodeRef;
+use super::{BNode, BSubtree};
+use crate::html::{AnyScope, NodeRef};
 use web_sys::Element;
 
 /// A Reconcile Target.
@@ -11,7 +10,7 @@ pub(super) trait ReconcileTarget {
     /// Remove self from parent.
     ///
     /// Parent to detach is `true` if the parent element will also be detached.
-    fn detach(self, parent: &Element, parent_to_detach: bool);
+    fn detach(self, root: &BSubtree, parent: &Element, parent_to_detach: bool);
 
     /// Move elements from one parent to another parent.
     /// This is for example used by `VSuspense` to preserve component state without detaching
@@ -26,6 +25,7 @@ pub(super) trait Reconcilable {
     /// Attach a virtual node to the DOM tree.
     ///
     /// Parameters:
+    /// - `root`: bundle of the subtree root
     /// - `parent_scope`: the parent `Scope` used for passing messages to the
     ///   parent `Component`.
     /// - `parent`: the parent node in the DOM.
@@ -34,6 +34,7 @@ pub(super) trait Reconcilable {
     /// Returns a reference to the newly inserted element.
     fn attach(
         self,
+        root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
@@ -58,6 +59,7 @@ pub(super) trait Reconcilable {
     /// Returns a reference to the newly inserted element.
     fn reconcile_node(
         self,
+        root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
@@ -66,6 +68,7 @@ pub(super) trait Reconcilable {
 
     fn reconcile(
         self,
+        root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
@@ -75,6 +78,7 @@ pub(super) trait Reconcilable {
     /// Replace an existing bundle by attaching self and detaching the existing one
     fn replace(
         self,
+        root: &BSubtree,
         parent_scope: &AnyScope,
         parent: &Element,
         next_sibling: NodeRef,
@@ -84,9 +88,9 @@ pub(super) trait Reconcilable {
         Self: Sized,
         Self::Bundle: Into<BNode>,
     {
-        let (self_ref, self_) = self.attach(parent_scope, parent, next_sibling);
+        let (self_ref, self_) = self.attach(root, parent_scope, parent, next_sibling);
         let ancestor = std::mem::replace(bundle, self_.into());
-        ancestor.detach(parent, false);
+        ancestor.detach(root, parent, false);
         self_ref
     }
 }
diff --git a/packages/yew/src/html/component/lifecycle.rs b/packages/yew/src/html/component/lifecycle.rs
index 92056f2a6..5d5e43a6d 100644
--- a/packages/yew/src/html/component/lifecycle.rs
+++ b/packages/yew/src/html/component/lifecycle.rs
@@ -10,7 +10,7 @@ use std::any::Any;
 use std::rc::Rc;
 
 #[cfg(feature = "csr")]
-use crate::dom_bundle::Bundle;
+use crate::dom_bundle::{BSubtree, Bundle};
 #[cfg(feature = "csr")]
 use crate::html::NodeRef;
 #[cfg(feature = "csr")]
@@ -20,7 +20,8 @@ pub(crate) enum ComponentRenderState {
     #[cfg(feature = "csr")]
     Render {
         bundle: Bundle,
-        parent: web_sys::Element,
+        root: BSubtree,
+        parent: Element,
         next_sibling: NodeRef,
         node_ref: NodeRef,
     },
@@ -37,12 +38,14 @@ impl std::fmt::Debug for ComponentRenderState {
             #[cfg(feature = "csr")]
             Self::Render {
                 ref bundle,
+                ref root,
                 ref parent,
                 ref next_sibling,
                 ref node_ref,
             } => f
                 .debug_struct("ComponentRenderState::Render")
                 .field("bundle", bundle)
+                .field("root", root)
                 .field("parent", parent)
                 .field("next_sibling", next_sibling)
                 .field("node_ref", node_ref)
@@ -63,6 +66,32 @@ impl std::fmt::Debug for ComponentRenderState {
     }
 }
 
+#[cfg(feature = "csr")]
+impl ComponentRenderState {
+    pub(crate) fn shift(&mut self, next_parent: Element, next_next_sibling: NodeRef) {
+        match self {
+            #[cfg(feature = "csr")]
+            Self::Render {
+                bundle,
+                parent,
+                next_sibling,
+                ..
+            } => {
+                bundle.shift(&next_parent, next_next_sibling.clone());
+
+                *parent = next_parent;
+                *next_sibling = next_next_sibling;
+            }
+
+            #[cfg(feature = "ssr")]
+            Self::Ssr { .. } => {
+                #[cfg(debug_assertions)]
+                panic!("shifting is not possible during SSR");
+            }
+        }
+    }
+}
+
 struct CompStateInner<COMP>
 where
     COMP: BaseComponent,
@@ -221,9 +250,6 @@ pub(crate) enum UpdateEvent {
     /// Wraps properties, node ref, and next sibling for a component
     #[cfg(feature = "csr")]
     Properties(Rc<dyn Any>, NodeRef, NodeRef),
-    /// Shift Scope.
-    #[cfg(feature = "csr")]
-    Shift(Element, NodeRef),
 }
 
 pub(crate) struct UpdateRunner {
@@ -264,32 +290,6 @@ impl Runnable for UpdateRunner {
                         }
                     }
                 }
-
-                #[cfg(feature = "csr")]
-                UpdateEvent::Shift(next_parent, next_sibling) => {
-                    match state.render_state {
-                        ComponentRenderState::Render {
-                            ref bundle,
-                            ref mut parent,
-                            next_sibling: ref mut current_next_sibling,
-                            ..
-                        } => {
-                            bundle.shift(&next_parent, next_sibling.clone());
-
-                            *parent = next_parent;
-                            *current_next_sibling = next_sibling;
-                        }
-
-                        // Shifting is not possible during SSR.
-                        #[cfg(feature = "ssr")]
-                        ComponentRenderState::Ssr { .. } => {
-                            #[cfg(debug_assertions)]
-                            panic!("shifting is not possible during SSR");
-                        }
-                    }
-
-                    false
-                }
             };
 
             #[cfg(debug_assertions)]
@@ -331,10 +331,11 @@ impl Runnable for DestroyRunner {
                 ComponentRenderState::Render {
                     bundle,
                     ref parent,
+                    ref root,
                     ref node_ref,
                     ..
                 } => {
-                    bundle.detach(parent, self.parent_to_detach);
+                    bundle.detach(root, parent, self.parent_to_detach);
 
                     node_ref.set(None);
                 }
@@ -429,12 +430,14 @@ impl RenderRunner {
             ComponentRenderState::Render {
                 ref mut bundle,
                 ref parent,
+                ref root,
                 ref next_sibling,
                 ref node_ref,
                 ..
             } => {
                 let scope = state.inner.any_scope();
-                let new_node_ref = bundle.reconcile(&scope, parent, next_sibling.clone(), new_root);
+                let new_node_ref =
+                    bundle.reconcile(root, &scope, parent, next_sibling.clone(), new_root);
                 node_ref.link(new_node_ref);
 
                 let first_render = !state.has_rendered;
@@ -492,6 +495,7 @@ mod tests {
     extern crate self as yew;
 
     use super::*;
+    use crate::dom_bundle::BSubtree;
     use crate::html;
     use crate::html::*;
     use crate::Properties;
@@ -612,12 +616,19 @@ mod tests {
     fn test_lifecycle(props: Props, expected: &[&str]) {
         let document = gloo_utils::document();
         let scope = Scope::<Comp>::new(None);
-        let el = document.create_element("div").unwrap();
-        let node_ref = NodeRef::default();
+        let parent = document.create_element("div").unwrap();
+        let root = BSubtree::create_root(&parent);
+
         let lifecycle = props.lifecycle.clone();
 
         lifecycle.borrow_mut().clear();
-        scope.mount_in_place(el, NodeRef::default(), node_ref, Rc::new(props));
+        scope.mount_in_place(
+            root,
+            parent,
+            NodeRef::default(),
+            NodeRef::default(),
+            Rc::new(props),
+        );
         crate::scheduler::start_now();
 
         assert_eq!(&lifecycle.borrow_mut().deref()[..], expected);
diff --git a/packages/yew/src/html/component/scope.rs b/packages/yew/src/html/component/scope.rs
index 04582114f..f48168f9e 100644
--- a/packages/yew/src/html/component/scope.rs
+++ b/packages/yew/src/html/component/scope.rs
@@ -387,7 +387,7 @@ pub(crate) use feat_csr_ssr::*;
 #[cfg(feature = "csr")]
 mod feat_csr {
     use super::*;
-    use crate::dom_bundle::Bundle;
+    use crate::dom_bundle::{BSubtree, Bundle};
     use crate::html::component::lifecycle::{
         ComponentRenderState, CreateRunner, DestroyRunner, RenderRunner,
     };
@@ -403,14 +403,17 @@ mod feat_csr {
         /// Mounts a component with `props` to the specified `element` in the DOM.
         pub(crate) fn mount_in_place(
             &self,
+            root: BSubtree,
             parent: Element,
             next_sibling: NodeRef,
             node_ref: NodeRef,
             props: Rc<COMP::Properties>,
         ) {
-            let bundle = Bundle::new(&parent, &next_sibling, &node_ref);
+            let bundle = Bundle::new();
+            node_ref.link(next_sibling.clone());
             let state = ComponentRenderState::Render {
                 bundle,
+                root,
                 node_ref,
                 parent,
                 next_sibling,
@@ -486,10 +489,10 @@ mod feat_csr {
         }
 
         fn shift_node(&self, parent: Element, next_sibling: NodeRef) {
-            scheduler::push_component_update(Box::new(UpdateRunner {
-                state: self.state.clone(),
-                event: UpdateEvent::Shift(parent, next_sibling),
-            }))
+            let mut state_ref = self.state.borrow_mut();
+            if let Some(render_state) = state_ref.as_mut() {
+                render_state.render_state.shift(parent, next_sibling)
+            }
         }
     }
 }
diff --git a/packages/yew/src/tests/layout_tests.rs b/packages/yew/src/tests/layout_tests.rs
index 682f7f596..a65096795 100644
--- a/packages/yew/src/tests/layout_tests.rs
+++ b/packages/yew/src/tests/layout_tests.rs
@@ -1,10 +1,9 @@
-use crate::dom_bundle::Bundle;
+use crate::dom_bundle::{BSubtree, Bundle};
 use crate::html::AnyScope;
 use crate::scheduler;
 use crate::virtual_dom::VNode;
 use crate::{Component, Context, Html};
 use gloo::console::log;
-use web_sys::Node;
 use yew::NodeRef;
 
 struct Comp;
@@ -38,11 +37,12 @@ pub struct TestLayout<'a> {
 
 pub fn diff_layouts(layouts: Vec<TestLayout<'_>>) {
     let document = gloo_utils::document();
-    let parent_scope: AnyScope = AnyScope::test();
+    let scope: AnyScope = AnyScope::test();
     let parent_element = document.create_element("div").unwrap();
-    let parent_node: Node = parent_element.clone().into();
+    let root = BSubtree::create_root(&parent_element);
+
     let end_node = document.create_text_node("END");
-    parent_node.append_child(&end_node).unwrap();
+    parent_element.append_child(&end_node).unwrap();
 
     // Tests each layout independently
     let next_sibling = NodeRef::new(end_node.into());
@@ -51,10 +51,8 @@ pub fn diff_layouts(layouts: Vec<TestLayout<'_>>) {
         let vnode = layout.node.clone();
         log!("Independently apply layout '{}'", layout.name);
 
-        let node_ref = NodeRef::default();
-
-        let mut bundle = Bundle::new(&parent_element, &next_sibling, &node_ref);
-        bundle.reconcile(&parent_scope, &parent_element, next_sibling.clone(), vnode);
+        let mut bundle = Bundle::new();
+        bundle.reconcile(&root, &scope, &parent_element, next_sibling.clone(), vnode);
         scheduler::start_now();
         assert_eq!(
             parent_element.inner_html(),
@@ -68,7 +66,7 @@ pub fn diff_layouts(layouts: Vec<TestLayout<'_>>) {
 
         log!("Independently reapply layout '{}'", layout.name);
 
-        bundle.reconcile(&parent_scope, &parent_element, next_sibling.clone(), vnode);
+        bundle.reconcile(&root, &scope, &parent_element, next_sibling.clone(), vnode);
         scheduler::start_now();
         assert_eq!(
             parent_element.inner_html(),
@@ -78,7 +76,7 @@ pub fn diff_layouts(layouts: Vec<TestLayout<'_>>) {
         );
 
         // Detach
-        bundle.detach(&parent_element, false);
+        bundle.detach(&root, &parent_element, false);
         scheduler::start_now();
         assert_eq!(
             parent_element.inner_html(),
@@ -89,14 +87,14 @@ pub fn diff_layouts(layouts: Vec<TestLayout<'_>>) {
     }
 
     // Sequentially apply each layout
-    let node_ref = NodeRef::default();
-    let mut bundle = Bundle::new(&parent_element, &next_sibling, &node_ref);
+    let mut bundle = Bundle::new();
     for layout in layouts.iter() {
         let next_vnode = layout.node.clone();
 
         log!("Sequentially apply layout '{}'", layout.name);
         bundle.reconcile(
-            &parent_scope,
+            &root,
+            &scope,
             &parent_element,
             next_sibling.clone(),
             next_vnode,
@@ -117,7 +115,8 @@ pub fn diff_layouts(layouts: Vec<TestLayout<'_>>) {
 
         log!("Sequentially detach layout '{}'", layout.name);
         bundle.reconcile(
-            &parent_scope,
+            &root,
+            &scope,
             &parent_element,
             next_sibling.clone(),
             next_vnode,
@@ -133,7 +132,7 @@ pub fn diff_layouts(layouts: Vec<TestLayout<'_>>) {
     }
 
     // Detach last layout
-    bundle.detach(&parent_element, false);
+    bundle.detach(&root, &parent_element, false);
     scheduler::start_now();
     assert_eq!(
         parent_element.inner_html(),
diff --git a/packages/yew/src/virtual_dom/vcomp.rs b/packages/yew/src/virtual_dom/vcomp.rs
index aebd72a36..7912238a0 100644
--- a/packages/yew/src/virtual_dom/vcomp.rs
+++ b/packages/yew/src/virtual_dom/vcomp.rs
@@ -9,6 +9,8 @@ use std::rc::Rc;
 #[cfg(any(feature = "ssr", feature = "csr"))]
 use crate::html::{AnyScope, Scope};
 
+#[cfg(feature = "csr")]
+use crate::dom_bundle::BSubtree;
 #[cfg(feature = "csr")]
 use crate::html::Scoped;
 #[cfg(feature = "csr")]
@@ -53,6 +55,7 @@ pub(crate) trait Mountable {
     #[cfg(feature = "csr")]
     fn mount(
         self: Box<Self>,
+        root: &BSubtree,
         node_ref: NodeRef,
         parent_scope: &AnyScope,
         parent: Element,
@@ -91,13 +94,14 @@ impl<COMP: BaseComponent> Mountable for PropsWrapper<COMP> {
     #[cfg(feature = "csr")]
     fn mount(
         self: Box<Self>,
+        root: &BSubtree,
         node_ref: NodeRef,
         parent_scope: &AnyScope,
         parent: Element,
         next_sibling: NodeRef,
     ) -> Box<dyn Scoped> {
         let scope: Scope<COMP> = Scope::new(Some(parent_scope.clone()));
-        scope.mount_in_place(parent, next_sibling, node_ref, self.props);
+        scope.mount_in_place(root.clone(), parent, next_sibling, node_ref, self.props);
 
         Box::new(scope)
     }
diff --git a/packages/yew/tests/failed_tests/base_component_impl-fail.stderr b/packages/yew/tests/failed_tests/base_component_impl-fail.stderr
index a7e774e1d..563ac8e34 100644
--- a/packages/yew/tests/failed_tests/base_component_impl-fail.stderr
+++ b/packages/yew/tests/failed_tests/base_component_impl-fail.stderr
@@ -1,12 +1,12 @@
 error[E0277]: the trait bound `Comp: yew::Component` is not satisfied
-   --> tests/failed_tests/base_component_impl-fail.rs:6:6
-    |
-6   | impl BaseComponent for Comp {
-    |      ^^^^^^^^^^^^^ the trait `yew::Component` is not implemented for `Comp`
-    |
-    = note: required because of the requirements on the impl of `html::component::sealed::SealedBaseComponent` for `Comp`
+  --> tests/failed_tests/base_component_impl-fail.rs:6:6
+   |
+6  | impl BaseComponent for Comp {
+   |      ^^^^^^^^^^^^^ the trait `yew::Component` is not implemented for `Comp`
+   |
+   = note: required because of the requirements on the impl of `html::component::sealed::SealedBaseComponent` for `Comp`
 note: required by a bound in `BaseComponent`
-   --> src/html/component/mod.rs
-    |
-    | pub trait BaseComponent: sealed::SealedBaseComponent + Sized + 'static {
-    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `BaseComponent`
+  --> src/html/component/mod.rs
+   |
+   | pub trait BaseComponent: sealed::SealedBaseComponent + Sized + 'static {
+   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `BaseComponent`
diff --git a/website/docs/advanced-topics/portals.mdx b/website/docs/advanced-topics/portals.mdx
index 8551dfcc1..2a355f98a 100644
--- a/website/docs/advanced-topics/portals.mdx
+++ b/website/docs/advanced-topics/portals.mdx
@@ -23,7 +23,7 @@ simple modal dialogue that renders its `children` into an element outside `yew`'
 identified by the `id="modal_host"`.
 
 ```rust
-use yew::{html, create_portal, function_component, Children, Properties, Html};
+use yew::prelude::*;
 
 #[derive(Properties, PartialEq)]
 pub struct ModalProps {
@@ -31,11 +31,11 @@ pub struct ModalProps {
     pub children: Children,
 }
 
-#[function_component(Modal)]
-fn modal(props: &ModalProps) -> Html {
+#[function_component]
+fn Modal(props: &ModalProps) -> Html {
     let modal_host = gloo::utils::document()
         .get_element_by_id("modal_host")
-        .expect("a #modal_host element");
+        .expect("Expected to find a #modal_host element");
 
     create_portal(
         html!{ {for props.children.iter()} },
@@ -44,5 +44,20 @@ fn modal(props: &ModalProps) -> Html {
 }
 ```
 
+## Event handling
+
+Events emitted on elements inside portals follow the virtual DOM when bubbling up. That is,
+if a portal is rendered as the child of an element, then an event listener on that element
+will catch events dispatched from inside the portal, even if the portal renders its contents
+in an unrelated location in the actual DOM.
+
+This allows developers to be oblivious of whether a component they consume, is implemented with
+or without portals. Events fired on its children will bubble up regardless.
+
+A known issue is that events from portals into **closed** shadow roots will be dispatched twice,
+once targeting the element inside the shadow root and once targeting the host element itself. Keep
+in mind that **open** shadow roots work fine. If this impacts you, feel free to open a bug report
+about it.
+
 ## Further reading
 - [Portals example](https://github.com/yewstack/yew/tree/master/examples/portals)
diff --git a/website/docs/concepts/html/events.mdx b/website/docs/concepts/html/events.mdx
index 86f51f6bd..4076102b7 100644
--- a/website/docs/concepts/html/events.mdx
+++ b/website/docs/concepts/html/events.mdx
@@ -135,6 +135,23 @@ listens for `click` events.
 | `ontransitionrun`           | [TransitionEvent](https://docs.rs/web-sys/latest/web_sys/struct.TransitionEvent.html) |
 | `ontransitionstart`         | [TransitionEvent](https://docs.rs/web-sys/latest/web_sys/struct.TransitionEvent.html) |
 
+## Event bubbling
+
+Events dispatched by Yew follow the virtual DOM hierarchy when bubbling up to listeners. Currently, only the bubbling phase
+is supported for listeners. Note that the virtual DOM hierarchy is most often, but not always, identical to the actual
+DOM hierarchy. The distinction is important when working with [portals](../../advanced-topics/portals.mdx) and other
+more advanced techniques. The intuition for well implemented components should be that events bubble from children
+to parents, so that the hierarchy in your coded `html!` is the one observed by event handlers.
+
+If you are not interested in event bubbling, you can turn it off by calling
+
+```rust
+yew::set_event_bubbling(false);
+```
+
+*before* starting your app. This speeds up event handling, but some components may break from not receiving events they expect.
+Use this with care!
+
 ## Typed event target
 
 :::caution