| <!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> |
| <style> |
| target { |
| opacity: 0; |
| } |
| </style> |
| |
| <container id="container"></container> |
| |
| <script> |
| var N = PerfTestHelper.getN(500); |
| var duration = 1000; |
| var keyframeValues = [0, 1]; |
| var id = 0; |
| |
| for (var i = 0; i < N; i++) { |
| var target = document.createElement('target'); |
| target._keyframe = 0; |
| target.style.transitionDelay = (-i / N * duration) + 'ms'; |
| container.appendChild(target); |
| target.addEventListener('transitionend', restartTransition); |
| } |
| |
| function restartTransition(event) { |
| event.target._keyframe ^= 1; |
| addNewIDStyle(event.target); |
| event.target.style.removeProperty('transition-delay'); |
| } |
| |
| function addNewIDStyle(target) { |
| id++; |
| if (target._currentIDStyle) { |
| target._currentIDStyle.remove(); |
| } |
| var style = document.createElement('style'); |
| style.textContent = '#id' + id + ' { opacity: ' + keyframeValues[target._keyframe] + ';}'; |
| container.appendChild(style); |
| target.id = 'id' + id; |
| target._currentIDStyle = style; |
| } |
| |
| requestAnimationFrame(function() { |
| var styleRule = document.styleSheets[2].rules[0].style; |
| styleRule.opacity = keyframeValues[1]; |
| requestAnimationFrame(function() { |
| styleRule.opacity = keyframeValues[0]; |
| }); |
| }); |
| |
| PerfTestHelper.signalReady(); |
| </script> |
