diff --git a/examples/todomvc.rs b/examples/todomvc.rs
index f3cb59f09..d5e56dd1a 100644
--- a/examples/todomvc.rs
+++ b/examples/todomvc.rs
@@ -7,8 +7,6 @@ fn main() {
     dioxus_desktop::launch(app);
 }
 
-const _STYLE: &str = manganis::mg!(file("./examples/assets/todomvc.css"));
-
 #[derive(PartialEq, Eq, Clone, Copy)]
 pub enum FilterState {
     All,
@@ -49,6 +47,7 @@ pub fn app(cx: Scope<()>) -> Element {
 
     cx.render(rsx! {
         section { class: "todoapp",
+            style { {include_str!("./assets/todomvc.css")} }
             TodoHeader { todos: todos }
             section { class: "main",
                 if !todos.is_empty() {
diff --git a/packages/autofmt/tests/samples/attributes.rsx b/packages/autofmt/tests/samples/attributes.rsx
index fa08b1cf4..4a0bdcdda 100644
--- a/packages/autofmt/tests/samples/attributes.rsx
+++ b/packages/autofmt/tests/samples/attributes.rsx
@@ -12,18 +12,6 @@ rsx! {
             let blah = 120;
             true
         },
-        onclick: move |_| {
-            let blah = 120;
-            true
-        },
-        onclick: move |_| {
-            let blah = 120;
-            true
-        },
-        onclick: move |_| {
-            let blah = 120;
-            true
-        },
         div {
             div { "hi" }
             h2 { class: "asd" }
diff --git a/packages/autofmt/tests/samples/complex.rsx b/packages/autofmt/tests/samples/complex.rsx
index 56c16e657..6ee62cfa5 100644
--- a/packages/autofmt/tests/samples/complex.rsx
+++ b/packages/autofmt/tests/samples/complex.rsx
@@ -6,7 +6,7 @@ rsx! {
             show_user_menu.set(!show_user_menu.get());
             evt.cancel_bubble();
         },
-        onclick: move |evt| show_user_menu.set(!show_user_menu.get()),
+        onmousedown: move |evt| show_user_menu.set(!show_user_menu.get()),
         span { class: "inline-block mr-4", icons::icon_14 {} }
         span { "Settings" }
     }
diff --git a/packages/core/src/virtual_dom.rs b/packages/core/src/virtual_dom.rs
index 932f9cbfb..2330edd77 100644
--- a/packages/core/src/virtual_dom.rs
+++ b/packages/core/src/virtual_dom.rs
@@ -401,13 +401,6 @@ impl VirtualDom {
                                 }
                             }
                         });
-
-                        // Break if this is the exact target element.
-                        // This means we won't call two listeners with the same name on the same element. This should be
-                        // documented, or be rejected from the rsx! macro outright
-                        if target_path == this_path {
-                            break;
-                        }
                     }
                 }
 
diff --git a/packages/html/Cargo.toml b/packages/html/Cargo.toml
index 82d1640e3..78d0a3caa 100644
--- a/packages/html/Cargo.toml
+++ b/packages/html/Cargo.toml
@@ -52,6 +52,8 @@ serde_json = "1"
 [features]
 default = ["serialize", "mounted", "eval"]
 serialize = [
+    "serde",
+    "serde_json",
     "serde_repr",
     "euclid/serde",
     "keyboard-types/serde",
diff --git a/packages/rsx/src/element.rs b/packages/rsx/src/element.rs
index 7d7a9a3c8..42812b66c 100644
--- a/packages/rsx/src/element.rs
+++ b/packages/rsx/src/element.rs
@@ -99,6 +99,27 @@ impl Parse for Element {
                 let span = content.span();
 
                 if name_str.starts_with("on") {
+                    // check for any duplicate event listeners
+                    if attributes.iter().any(|f| {
+                        if let AttributeType::Named(ElementAttrNamed {
+                            attr:
+                                ElementAttr {
+                                    name: ElementAttrName::BuiltIn(n),
+                                    value: ElementAttrValue::EventTokens(_),
+                                },
+                            ..
+                        }) = f
+                        {
+                            n == &name_str
+                        } else {
+                            false
+                        }
+                    }) {
+                        return Err(syn::Error::new(
+                            name.span(),
+                            format!("Duplicate event listener `{}`", name),
+                        ));
+                    }
                     attributes.push(attribute::AttributeType::Named(ElementAttrNamed {
                         el_name: el_name.clone(),
                         attr: ElementAttr {