| <!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> |
| show + target { |
| opacity: 1; |
| } |
| hide + target { |
| opacity: 0; |
| } |
| show, hide { |
| display: none; |
| } |
| </style> |
| |
| <container id="container"></container> |
| |
| <script> |
| var N = PerfTestHelper.getN(1000); |
| var duration = 1000; |
| var stash = {SHOW: [], HIDE: []}; |
| var targets = []; |
| |
| for (var i = 0; i < N; i++) { |
| stash.HIDE.push(document.createElement('hide')); |
| var show = document.createElement('show'); |
| container.appendChild(show); |
| var target = document.createElement('target'); |
| container.appendChild(target); |
| targets.push(target); |
| } |
| |
| function startTransition(target, fastForward) { |
| var state = target.previousSibling; |
| stash[state.tagName].push(state); |
| state.remove(); |
| var newState = state.tagName == 'SHOW' ? stash.HIDE.pop() : stash.SHOW.pop(); |
| container.insertBefore(newState, target); |
| 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> |
