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

samples/solar/web/solar.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.
 
 /**
  * A solar system visualization.
  */
 
 library solar;
 
@@ skipping 50 matching lines @@
   SolarSystem(this.canvas) {
 
   }
 
   num get width => _width;
 
   num get height => _height;
 
   start() {
     // Measure the canvas element.
-    window.setImmediate(() {
+    window.immediate.then((_) {
       _width = (canvas.parent as Element).clientWidth;
       _height = (canvas.parent as Element).clientHeight;
 
       canvas.width = _width;
 
       // Initialize the planets and start the simulation.
       _start();
     });
   }
 
@@ skipping 185 matching lines @@
     } else {
       num angle = solarSystem.renderTime * orbitSpeed;
 
       return new Point(
         orbitRadius * cos(angle) + x,
         orbitRadius * sin(angle) + y);
     }
   }
 
 }