diff --git a/‎packages/zone.js/lib/common/timers.ts‎
Lines changed: 1 addition & 1 deletion b/‎packages/zone.js/lib/common/timers.ts‎
Lines changed: 1 addition & 1 deletion
diff --git a/‎packages/zone.js/test/common/setTimeout.spec.ts‎
Lines changed: 13 additions & 0 deletions b/‎packages/zone.js/test/common/setTimeout.spec.ts‎
Lines changed: 13 additions & 0 deletions
@@ -49,7 +49,7 @@ export function patchTimer(window: any, setName: string, cancelName: string, nam
     } else {
       data.handle = handleOrId;
       // On Node.js a timeout and interval can be restarted over and over again by using the `.refresh` method.
-      data.isRefreshable = isFunction(handleOrId.refresh);
+      data.isRefreshable = isFunction(handleOrId?.refresh);
     }
 
     return task;
 
@@ -151,4 +151,17 @@ describe('setTimeout', function () {
     clearTimeout(null as any);
     clearTimeout(<any>{});
   });
+
+  it('should not throw when the native timer returns null', function () {
+    // A wrapper that blocks a timer (e.g. a browser extension or automation
+    // harness) can return null instead of a handle, see issue #70044.
+    const fakeGlobal = {
+      setTimeout: function () {
+        return null;
+      },
+      clearTimeout: function () {},
+    };
+    patchTimer(fakeGlobal, 'set', 'clear', 'Timeout');
+    expect(() => (fakeGlobal as any).setTimeout(() => {}, 0)).not.toThrow();
+  });
 });
Original file line number	Diff line number	Diff line change
`@@ -49,7 +49,7 @@ export function patchTimer(window: any, setName: string, cancelName: string, nam`
`49`	`49`	`} else {`
`50`	`50`	`data.handle = handleOrId;`
`51`	`51`	// On Node.js a timeout and interval can be restarted over and over again by using the `.refresh` method.
`52`		`- data.isRefreshable = isFunction(handleOrId.refresh);`
	`52`	`+ data.isRefreshable = isFunction(handleOrId?.refresh);`
`53`	`53`	`}`
`54`	`54`
`55`	`55`	`return task;`