Combine window.setTimeout/setInterval with Timer and Timer.repeating. Also

tools/dom/src/Microtask.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of html;
 
 typedef void _MicrotaskCallback();
 
 /**
  * This class attempts to invoke a callback as soon as the current event stack
@@ skipping 88 matching lines @@
     // Toggle it to trigger the mutation event.
     _dummy.hidden = !_dummy.hidden;
   }
 
   _handleMutation(List<MutationRecord> mutations, MutationObserver observer) {
     this._onCallback();
   }
 }
 
 /**
- * Scheduler which uses window.setImmediate to schedule events.
+ * Scheduler which uses window.immediate to schedule events.
  */
 class _SetImmediateScheduler extends _MicrotaskScheduler {
   _SetImmediateScheduler(_MicrotaskCallback callback): super(callback);
 
   void _schedule() {
     window._setImmediate(_handleImmediate);
   }
 
   void _handleImmediate() {
     this._onCallback();
@@ skipping 27 matching lines @@
 /**
  * Complete all pending microtasks.
  */
 void _completeMicrotasks() {
   var callbacks = _pendingMicrotasks;
   _pendingMicrotasks = null;
   for (var callback in callbacks) {
     callback();
   }
 }