LayoutTests/webanimations/accelerated-animation-interruption-display-none.html - WebKit - Git at Google

 <!DOCTYPE html>
 <html>
 <head>
 <style>

 #target {
     width: 100px;
     height: 100px;
     background-color: black;
     animation: foo linear 10s;
 }

 @keyframes foo {
     from { transform: "translateX(100px)" };
     to { transform: "none" };
 }

 </style>
 </head>
 <body>
 <script src="../resources/testharness.js"></script>
 <script src="../resources/testharnessreport.js"></script>
 <div id="target"></div>

 <script>

 function waitNFrames(numberOfFrames, continuation)
 {
     let elapsedFrames = 0;
     (function rAFCallback() {
         if (elapsedFrames++ >= numberOfFrames)
             continuation();
         else
             requestAnimationFrame(rAFCallback);
     })();
 }

 async_test(t => {
     const initialNumberOfTimelineInvalidations = internals.numberOfAnimationTimelineInvalidations();
     waitNFrames(3, () => {
         assert_greater_than(internals.numberOfAnimationTimelineInvalidations(), initialNumberOfTimelineInvalidations, "There should be updates made to the timeline as an animation is set up.");

         document.getElementById("target").style.display = "none";

         waitNFrames(2, () => {
             const numberOfTimelineInvalidationsAfterInterruption = internals.numberOfAnimationTimelineInvalidations();
             requestAnimationFrame(() => {
                 assert_equals(internals.numberOfAnimationTimelineInvalidations(), numberOfTimelineInvalidationsAfterInterruption, "There should not be any updates made to the timeline after interrupting the single running animation.");
                 t.done();
             });
         });
     });
 }, "Interrupting an animation by setting 'display: none' should stop invalidating the animation timeline.");

 </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<style>

	#target {
	width: 100px;
	height: 100px;
	background-color: black;
	animation: foo linear 10s;
	}

	@keyframes foo {
	from { transform: "translateX(100px)" };
	to { transform: "none" };
	}

	</style>
	</head>
	<body>
	<script src="../resources/testharness.js"></script>
	<script src="../resources/testharnessreport.js"></script>
	<div id="target"></div>

	<script>

	function waitNFrames(numberOfFrames, continuation)
	{
	let elapsedFrames = 0;
	(function rAFCallback() {
	if (elapsedFrames++ >= numberOfFrames)
	continuation();
	else
	requestAnimationFrame(rAFCallback);
	})();
	}

	async_test(t => {
	const initialNumberOfTimelineInvalidations = internals.numberOfAnimationTimelineInvalidations();
	waitNFrames(3, () => {
	assert_greater_than(internals.numberOfAnimationTimelineInvalidations(), initialNumberOfTimelineInvalidations, "There should be updates made to the timeline as an animation is set up.");

	document.getElementById("target").style.display = "none";

	waitNFrames(2, () => {
	const numberOfTimelineInvalidationsAfterInterruption = internals.numberOfAnimationTimelineInvalidations();
	requestAnimationFrame(() => {
	assert_equals(internals.numberOfAnimationTimelineInvalidations(), numberOfTimelineInvalidationsAfterInterruption, "There should not be any updates made to the timeline after interrupting the single running animation.");
	t.done();
	});
	});
	});
	}, "Interrupting an animation by setting 'display: none' should stop invalidating the animation timeline.");

	</script>
	</body>
	</html>