tvcutsem · June 22, 2011 18:08
diff --git a/deferredtest.html b/deferredtest.html
 <!DOCTYPE html>
 <html>
 <head>
 <!-- using Kris Kowal's Q library, based on CommonJS Promises/B
  https://github.com/kriskowal/q
  http://wiki.commonjs.org/wiki/Promises/B

  Code based on ideas by Mark S. Miller and Dave Herman. The animation example
  was taken from <http://wiki.ecmascript.org/doku.php?id=strawman:deferred_functions>
 -->
 <script src="https://github.com/kriskowal/q/raw/master/q.js"></script>
 <script type="application/javascript;version=1.7">

 // deferred function(<params>) { <body> }
 // ~~>
 // Q.async(function*(<params>) { <body> });
 //
 // await <expr>
 // ~~>
 // yield <expr>

 function isStopIteration(e) {
  return Object.prototype.toString.call(e) === "[object StopIteration]";
 }

 Q.async = function(generatorFunc) {
  return function asyncFunc(/*...args*/) {
    var args = Array.prototype.slice.call(arguments);
    const continuer = function(verb, valueOrErr) {
      let awaited;
      try {
        awaited = generator[verb](valueOrErr);        
      } catch (e) {        
        if (isStopIteration(e)) { return Q.ref(e.value); }
        return Q.reject(e);
      }
      return Q.when(Q.ref(awaited), callback, errback);
    };
    
    const generator = generatorFunc.apply(this, args);
    const callback  = continuer.bind(continuer, 'send');
    const errback   = continuer.bind(continuer, 'throw');

    return callback(void 0);
  };
 };

 function delay(millis, answer) {
  const deferredResult = Q.defer();
  setTimeout(function() { deferredResult.resolve(answer); }, millis);
  return deferredResult.promise;
 }

 var deferredAnimate = Q.async(function(element) {
 for (var i = 0; i < 100; ++i) {
   element.style.marginLeft = ''+i+'px';
   yield delay(20);
 }
 });

 function test() {
  Q.when(Q.ref(deferredAnimate(document.getElementById('box'))),
    function() { alert('Done!'); });  
 }
 </script> 
 </head>
 <body onload="test()">
  <div id="box" style="width: 20px; height: 20px; background-color: red;"></div>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<!-- using Kris Kowal's Q library, based on CommonJS Promises/B
	https://github.com/kriskowal/q
	http://wiki.commonjs.org/wiki/Promises/B

	Code based on ideas by Mark S. Miller and Dave Herman. The animation example
	was taken from <http://wiki.ecmascript.org/doku.php?id=strawman:deferred_functions>
	-->
	<script src="https://github.com/kriskowal/q/raw/master/q.js"></script>
	<script type="application/javascript;version=1.7">

	// deferred function(<params>) { <body> }
	// ~~>
	// Q.async(function*(<params>) { <body> });
	//
	// await <expr>
	// ~~>
	// yield <expr>

	function isStopIteration(e) {
	return Object.prototype.toString.call(e) === "[object StopIteration]";
	}

	Q.async = function(generatorFunc) {
	return function asyncFunc(/...args/) {
	var args = Array.prototype.slice.call(arguments);
	const continuer = function(verb, valueOrErr) {
	let awaited;
	try {
	awaited = generator[verb](valueOrErr);
	} catch (e) {
	if (isStopIteration(e)) { return Q.ref(e.value); }
	return Q.reject(e);
	}
	return Q.when(Q.ref(awaited), callback, errback);
	};

	const generator = generatorFunc.apply(this, args);
	const callback = continuer.bind(continuer, 'send');
	const errback = continuer.bind(continuer, 'throw');

	return callback(void 0);
	};
	};

	function delay(millis, answer) {
	const deferredResult = Q.defer();
	setTimeout(function() { deferredResult.resolve(answer); }, millis);
	return deferredResult.promise;
	}

	var deferredAnimate = Q.async(function(element) {
	for (var i = 0; i < 100; ++i) {
	element.style.marginLeft = ''+i+'px';
	yield delay(20);
	}
	});

	function test() {
	Q.when(Q.ref(deferredAnimate(document.getElementById('box'))),
	function() { alert('Done!'); });
	}
	</script>
	</head>
	<body onload="test()">
	<div id="box" style="width: 20px; height: 20px; background-color: red;"></div>
	</body>
	</html>