test(op_crates/web): add EventTarget tests (#8205)

2 files changed, 21 insertions, 0 deletions

diff --git a/cli/tests/unit/event_target_test.ts b/cli/tests/unit/event_target_test.ts
index 10293a0e9..34271b470 100644
--- a/cli/tests/unit/event_target_test.ts
+++ b/cli/tests/unit/event_target_test.ts
@@ -223,3 +223,23 @@ unitTest(
     assertEquals(callCount, 2);
   },
 );
+unitTest(function eventTargetDispatchShouldSetTargetNoListener(): void {
+  const target = new EventTarget();
+  const event = new Event("foo");
+  assertEquals(event.target, null);
+  target.dispatchEvent(event);
+  assertEquals(event.target, target);
+});
+
+unitTest(function eventTargetDispatchShouldSetTargetInListener(): void {
+  const target = new EventTarget();
+  const event = new Event("foo");
+  assertEquals(event.target, null);
+  let called = false;
+  target.addEventListener("foo", (e) => {
+    assertEquals(e.target, target);
+    called = true;
+  });
+  target.dispatchEvent(event);
+  assertEquals(called, true);
+});
diff --git a/op_crates/web/01_event.js b/op_crates/web/01_event.js
index 9067361fd..8a4e79059 100644
--- a/op_crates/web/01_event.js
+++ b/op_crates/web/01_event.js
@@ -936,6 +936,7 @@
 
       const listeners = eventTargetData.get(self).listeners;
       if (!(event.type in listeners)) {
+        setTarget(event, this);
         return true;
       }