third_party/WebKit/LayoutTests/animations/custom-properties/registered-var-to-registered-animating.html - Issue 2809063002: WIP Support var() references in registered custom property keyframes

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Issue 2809063002: WIP Support var() references in registered custom property keyframes (Closed)

Patch Set: Rebased Created 3 years, 6 months ago

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	1 <!DOCTYPE html>

	2 <script src="../../resources/testharness.js"></script>

	3 <script src="../../resources/testharnessreport.js"></script>

	4 <style>

	5 #target {

	6 --from: 100;

	7 }

	8 </style>

	9 <div id="target"></div>

	10 <script>

	11 for (let name of ['--test', '--from', '--to']) {

	12 CSS.registerProperty({

	13 name,

	14 syntax: '<number>',

	15 initialValue: '0',

	16 });

	17 }

	18

	19 test(() => {

	20 let animation = target.animate({'--test': ['var(--from)', 'var(--to)']}, 100);

	21 let toAnimation = target.animate({'--to': ['200', '300']}, 100);

	22

	23 toAnimation.currentTime = 25;

	24 {

	25 animation.currentTime = 25;

	26 // lerp(100, lerp(200, 300, 25%), 25%) == 0.75100 + 0.25(0.75200 + 0.253 00) == 131.25

	27 assert_equals(getComputedStyle(target).getPropertyValue('--test'), '131.25', 'target at 25%, to at 25%');

	28

	29 animation.currentTime = 75;

	30 // lerp(100, lerp(200, 300, 25%), 75%) == 0.25100 + 0.75(0.75200 + 0.253 00) == 193.75

	31 assert_equals(getComputedStyle(target).getPropertyValue('--test'), '193.75', 'target at 75%, to at 25%');

	32 }

	33

	34 toAnimation.currentTime = 75;

	35 {

	36 animation.currentTime = 25;

	37 // lerp(100, lerp(200, 300, 75%), 25%) == 0.75100 + 0.25(0.25200 + 0.753 00) == 143.75

	38 assert_equals(getComputedStyle(target).getPropertyValue('--test'), '143.75', 'target at 25%, to at 25%');

	39

	40 animation.currentTime = 75;

	41 // lerp(100, lerp(200, 300, 75%), 75%) == 0.25100 + 0.75(0.25200 + 0.753 00) == 231.25

	42 assert_equals(getComputedStyle(target).getPropertyValue('--test'), '231.25', 'target at 75%, to at 25%');

	43 }

	44 }, 'Registered custom property animation keyframes with var() references to anim ating unregistered custom properties');

	45 </script>

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