Fallback for setImmediate (#2428)

packages/api/src/promise/Api.ts

@@ -69,7 +69,9 @@ function decorateCall<Method extends DecorateFn<ObsInnerType<ReturnType<Method>>
       catchError((error) => tracker.reject(error))
     ).subscribe((result): void => {
       tracker.resolve(result);
-      setImmediate(() => subscription.unsubscribe());
+      typeof setImmediate === 'undefined'
+        ? setTimeout(() => subscription.unsubscribe(), 0)
+        : setImmediate(() => subscription.unsubscribe());
     });
   });
 }
@@ -87,7 +89,9 @@ function decorateSubscribe<Method extends DecorateFn<ObsInnerType<ReturnType<Met
     ).subscribe((result): void => {
       // We use setImmediate here to ensure that the Promise above (tracker) has resolved, before returning
       // the first result. By putting is back in the queue, the promise above is guarded for first execution
-      setImmediate(() => resultCb(result) as void);
+      typeof setImmediate === 'undefined'
+        ? setTimeout(() => resultCb(result) as void, 0)
+        : setImmediate(() => resultCb(result) as void);
     });
   });
 }