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

samples/isolate_html/isolate_sample.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.
 
 library isolate_sample;
 
 import 'dart:html';
 import 'dart:isolate';
 
 /*
@@ skipping 57 matching lines @@
   /**
    * Display the message we received, and send back a simple reply (unless
    * the user has unchecked the reply checkbox).
    */
   void greeting(String message, SendPort replyTo) {
     div.query('.messageBox').innerHtml =
       'received message: <span class="messageText">"${message}"</span>';
     if (div.query('input.replyCheckbox').checked) {
       InputElement element = div.query('.delayTextbox');
       int millis = int.parse(element.value);
-      // TODO(justinfagnani): use Timer when it works in isolates in dart2js
-      // see: http://dartbug.com/4997
-      window.setTimeout(() {
+      new Timer(new Duration(milliseconds: millis), () {
         replyTo.send('this is a reply from isolate "${isolateName}"', null);
-      }, millis);
+      });
     }
   }
 
   port.receive((message, SendPort replyTo) {
     switch(message['id']) {
       case MessageId.INIT:
         init(message['args'][0], message['args'][1]);
       break;
       case MessageId.GREETING:
         greeting(message['args'][0], replyTo);
@@ skipping 26 matching lines @@
       ports[isolateName].call(message).then((var msg) {
         replyElement.text = msg;
       });
     });
   }
 
   port.receive((var message, SendPort replyTo) {
     replyElement.text = message;
   });
 }