| <!DOCTYPE html> |
| <meta name="viewport" content="width=device-width, user-scalable=no"> |
| <link rel="stylesheet" type="text/css" href="resources/tablet.css"> |
| <link rel="stylesheet" type="text/css" href="resources/transition.css"> |
| <script src="resources/perf_test_helper.js"></script> |
| |
| <container id="container"></container> |
| |
| <script> |
| var N = PerfTestHelper.getN(1000); |
| var duration = 1000; |
| var targets = []; |
| var keyframeValues = [0, 1]; |
| |
| for (var i = 0; i < N; i++) { |
| var target = document.createElement('target'); |
| target._keyframe = 1; |
| target.style.opacity = keyframeValues[target._keyframe]; |
| container.appendChild(target); |
| targets.push(target); |
| } |
| |
| function startTransition(target, fastForward) { |
| target._keyframe ^= 1; |
| target.style.opacity = keyframeValues[target._keyframe]; |
| target.style.transitionDelay = -fastForward + 'ms'; |
| } |
| |
| requestAnimationFrame(function(time) { |
| var startTime = time - duration; |
| var step = 0; |
| |
| function staggeredStart(time) { |
| var elapsed = time - startTime; |
| var targetStep = Math.floor(N * elapsed / duration); |
| step = Math.max(targetStep - N, step); |
| for (; step < targetStep; step++) { |
| startTransition(targets[step % N], elapsed - (step / N * duration)); |
| } |
| requestAnimationFrame(staggeredStart); |
| } |
| staggeredStart(time); |
| }); |
| |
| PerfTestHelper.signalReady(); |
| </script> |
