2 files changed, 13 insertions, 0 deletions
diff --git a/components/script/dom/event.rs b/components/script/dom/event.rs
index 914cf279278..1be80dc7d36 100644
--- a/components/script/dom/event.rs
+++ b/components/script/dom/event.rs
@@ -309,6 +309,18 @@ impl EventMethods for Event {
         }
     }
 
+    // https://dom.spec.whatwg.org/#dom-event-cancelbubble
+    fn CancelBubble(&self) -> bool {
+        self.stop_propagation.get()
+    }
+
+    // https://dom.spec.whatwg.org/#dom-event-cancelbubble
+    fn SetCancelBubble(&self, value: bool) {
+        if value {
+            self.stop_propagation.set(true)
+        }
+    }
+
     // https://dom.spec.whatwg.org/#dom-event-timestamp
     fn TimeStamp(&self) -> u64 {
         self.timestamp
diff --git a/components/script/dom/webidls/Event.webidl b/components/script/dom/webidls/Event.webidl
index 1a6fd8e4a5c..f6074bd68f3 100644
--- a/components/script/dom/webidls/Event.webidl
+++ b/components/script/dom/webidls/Event.webidl
@@ -20,6 +20,7 @@ interface Event {
   readonly attribute unsigned short eventPhase;
 
   void stopPropagation();
+  attribute boolean cancelBubble;
   void stopImmediatePropagation();
 
   [Pure]