nodejs
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‎lib/internal/event_target.js‎
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‎lib/internal/event_target.js‎
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‎test/parallel/test-abortcontroller.js‎
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‎test/parallel/test-abortcontroller.js‎
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‎test/parallel/test-events-customevent.js‎
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‎test/parallel/test-events-customevent.js‎
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‎test/parallel/test-eventtarget.js‎
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‎test/parallel/test-eventtarget.js‎
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‎test/wpt/status/dom/events.json‎
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‎test/wpt/status/dom/events.json‎
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@@ -119,8 +119,6 @@ class Event {
       isTrustedSet.add(this);
     }
 
-    // isTrusted is special (LegacyUnforgeable)
-    ObjectDefineProperty(this, 'isTrusted', isTrustedDescriptor);
     this[kTarget] = null;
     this[kIsBeingDispatched] = false;
   }
@@ -343,6 +341,11 @@ ObjectDefineProperties(
     eventPhase: kEnumerableProperty,
     cancelBubble: kEnumerableProperty,
     stopPropagation: kEnumerableProperty,
+    // Don't conform to the spec with isTrusted. The spec defines it as
+    // LegacyUnforgeable but defining it in the constructor has a big
+    // performance impact and the property doesn't seem to be useful outside of
+    // browsers.
+    isTrusted: isTrustedDescriptor,
   });
 
 function isCustomEvent(value) {
 
@@ -57,9 +57,9 @@ const { setTimeout: sleep } = require('timers/promises');
   }));
   first.abort();
   second.abort();
-  const firstTrusted = Reflect.getOwnPropertyDescriptor(ev1, 'isTrusted').get;
-  const secondTrusted = Reflect.getOwnPropertyDescriptor(ev2, 'isTrusted').get;
-  const untrusted = Reflect.getOwnPropertyDescriptor(ev3, 'isTrusted').get;
+  const firstTrusted = Reflect.getOwnPropertyDescriptor(Object.getPrototypeOf(ev1), 'isTrusted').get;
+  const secondTrusted = Reflect.getOwnPropertyDescriptor(Object.getPrototypeOf(ev2), 'isTrusted').get;
+  const untrusted = Reflect.getOwnPropertyDescriptor(Object.getPrototypeOf(ev3), 'isTrusted').get;
   strictEqual(firstTrusted, secondTrusted);
   strictEqual(untrusted, firstTrusted);
 }
 
@@ -187,7 +187,7 @@ const { Event, EventTarget, CustomEvent } = require('internal/event_target');
 }
 {
   const ev = new CustomEvent('foo');
-  deepStrictEqual(Object.keys(ev), ['isTrusted']);
+  strictEqual(ev.isTrusted, false);
 }
 
 // Works with EventTarget
 
@@ -126,7 +126,7 @@ let asyncTest = Promise.resolve();
 }
 {
   const ev = new Event('foo');
-  deepStrictEqual(Object.keys(ev), ['isTrusted']);
+  strictEqual(ev.isTrusted, false);
 }
 {
   const eventTarget = new EventTarget();
 
@@ -11,6 +11,13 @@
   "Event-dispatch-listener-order.window.js": {
     "skip": "document is not defined"
   },
+  "Event-isTrusted.any.js": {
+    "fail": {
+      "expected": [
+        "Event-isTrusted"
+      ]
+    }
+  },
   "EventListener-addEventListener.sub.window.js": {
     "skip": "document is not defined"
   },
Original file line number	Diff line number	Diff line change
`@@ -187,7 +187,7 @@ const { Event, EventTarget, CustomEvent } = require('internal/event_target');`
`187`	`187`	`}`
`188`	`188`	`{`
`189`	`189`	`const ev = new CustomEvent('foo');`
`190`		`- deepStrictEqual(Object.keys(ev), ['isTrusted']);`
	`190`	`+ strictEqual(ev.isTrusted, false);`
`191`	`191`	`}`
`192`	`192`
`193`	`193`	`// Works with EventTarget`
Original file line number	Diff line number	Diff line change
`@@ -126,7 +126,7 @@ let asyncTest = Promise.resolve();`
`126`	`126`	`}`
`127`	`127`	`{`
`128`	`128`	`const ev = new Event('foo');`
`129`		`- deepStrictEqual(Object.keys(ev), ['isTrusted']);`
	`129`	`+ strictEqual(ev.isTrusted, false);`
`130`	`130`	`}`
`131`	`131`	`{`
`132`	`132`	`const eventTarget = new EventTarget();`