1 files changed, 3 insertions, 0 deletions
diff --git a/components/script/task_source.rs b/components/script/task_source.rs
index 4f18292693e..4bb6a5c110c 100644
--- a/components/script/task_source.rs
+++ b/components/script/task_source.rs
@@ -40,6 +40,8 @@ pub(crate) enum TaskSourceName {
     Timer,
     /// <https://www.w3.org/TR/gamepad/#dfn-gamepad-task-source>
     Gamepad,
+    /// <https://w3c.github.io/IntersectionObserver/#intersectionobserver-task-source>
+    IntersectionObserver,
 }
 
 impl From<TaskSourceName> for ScriptThreadEventCategory {
@@ -62,6 +64,7 @@ impl From<TaskSourceName> for ScriptThreadEventCategory {
             TaskSourceName::WebSocket => ScriptThreadEventCategory::WebSocketEvent,
             TaskSourceName::Timer => ScriptThreadEventCategory::TimerEvent,
             TaskSourceName::Gamepad => ScriptThreadEventCategory::InputEvent,
+            TaskSourceName::IntersectionObserver => ScriptThreadEventCategory::ScriptEvent,
         }
     }
 }