tools/perf/page_sets/tough_animation_cases/css_transitions_staggered_chaining_by_updating_inline_style.html - Issue 399393002: Add CSS Transitions performance tests

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Side by Side Diff: tools/perf/page_sets/tough_animation_cases/css_transitions_staggered_chaining_by_updating_inline_style.html

Issue 399393002: Add CSS Transitions performance tests (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src

Patch Set: Appease linter Created 6 years, 2 months ago

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	1 <!DOCTYPE html>

	2 <meta name="viewport" content="width=device-width, user-scalable=no">

	3 <link rel="stylesheet" type="text/css" href="resources/tablet.css">

	4 <link rel="stylesheet" type="text/css" href="resources/transition.css">

	5 <script src="resources/perftesthelper.js"></script>

	6 <style>

	7 target {

	8 opacity: 0;

	9 }

	10 </style>

	11

	12 <container id="container"></container>

	13

	14 <script>

	15 var N = PerfTestHelper.getN(1000);

	16 var duration = 1000;

	17 var keyframeValues = [0, 1];

	18

	19 for (var i = 0; i < N; i++) {

	20 var target = document.createElement('target');

	21 target._keyframe = 0;

	22 target.style.transitionDelay = (-i / N * duration) + 'ms';

	23 container.appendChild(target);

	24 target.addEventListener('transitionend', restartTransition);

	25 }

	26

	27 function restartTransition(event) {

	28 event.target._keyframe ^= 1;

	29 event.target.style.opacity = keyframeValues[event.target._keyframe];

	30 event.target.style.removeProperty('transition-delay');

	31 }

	32

	33 requestAnimationFrame(function() {

	34 var styleRule = document.styleSheets[2].rules[0].style;

	35 styleRule.opacity = keyframeValues[1];

	36 requestAnimationFrame(function() {

	37 styleRule.opacity = keyframeValues[0];

	38 });

	39 });

	40

	41 PerfTestHelper.signalReady();

	42 </script>

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