| <!DOCTYPE html> |
| <meta name="viewport" content="width=device-width, user-scalable=no"> |
| <link rel="stylesheet" type="text/css" href="resources/tablet.css"> |
| <script src="resources/perf_test_helper.js"></script> |
| |
| <container id="container"></container> |
| |
| <script> |
| var N = PerfTestHelper.getN(500); |
| var duration = 1000; |
| |
| function startAnimation() { |
| var target = document.createElement('target'); |
| container.appendChild(target); |
| updateStyle(target); |
| target.addEventListener('animationend', function(e) { |
| updateStyle(target); |
| }); |
| } |
| |
| var nextId = 0; |
| var nextAnim = 0; |
| function updateStyle(element) { |
| if (!element.id) { |
| element.id = 'e' + nextId++; |
| } |
| if (element.styleSheet) { |
| element.styleSheet.remove(); |
| } |
| var id = element.id; |
| var anim = id + 'anim' + nextAnim++; |
| var style = document.createElement('style'); |
| style.textContent = '\ |
| #' + id + ' {\ |
| animation: ' + anim + ' 1s;\ |
| }\n\ |
| @keyframes ' + anim + ' {\ |
| 0% { opacity: 0; }\ |
| 100% { opacity: 1; }\ |
| }'; |
| container.appendChild(style); |
| element.styleSheet = style; |
| } |
| |
| requestAnimationFrame(function(t) { |
| var base = t; |
| var i = 0; |
| |
| function staggeredStart(t) { |
| elapsed = t - base; |
| for (; i < N * elapsed / duration; i++) { |
| startAnimation(); |
| } |
| if (i < N) { |
| requestAnimationFrame(staggeredStart); |
| } else { |
| PerfTestHelper.signalReady(); |
| } |
| } |
| requestAnimationFrame(staggeredStart); |
| }); |
| </script> |
