view-timeline-keyframe-boundary-interpolation.html (4256B)
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <link rel="help" src="https://drafts.csswg.org/scroll-animations-1/#named-timeline-range"> 6 <script src="/resources/testharness.js"></script> 7 <script src="/resources/testharnessreport.js"></script> 8 <script src="/web-animations/testcommon.js"></script> 9 <script src="support/testcommon.js"></script> 10 <title>Animation range and delay</title> 11 </head> 12 <style type="text/css"> 13 @keyframes anim { 14 cover 0% { /* resolves to -100% */ 15 opacity: 0; 16 transform: none; 17 margin-left: 0px; 18 /* missing margin-right -- requires neutral keyframe at 0% */ 19 } 20 cover 100% { /* resolves to 200% */ 21 opacity: 1; 22 transform: translateX(300px); 23 margin-right: 0px; 24 /* missing margin-left -- requires neutral keyframe at 100% */ 25 } 26 } 27 #scroller { 28 border: 10px solid lightgray; 29 overflow-y: scroll; 30 overflow-x: hidden; 31 width: 300px; 32 height: 200px; 33 } 34 #target { 35 margin: 800px 10px; 36 width: 100px; 37 height: 100px; 38 z-index: -1; 39 background-color: green; 40 animation: anim auto both linear; 41 animation-timeline: --t1; 42 animation-range-start: contain 0%; 43 animation-range-end: contain 100%; 44 view-timeline: --t1 block; 45 } 46 </style> 47 <body> 48 <div id=scroller> 49 <div id=target></div> 50 </div> 51 </body> 52 <script type="text/javascript"> 53 async function runTest() { 54 55 const epsilon = 1e-5; 56 57 function assert_progress_equals(anim, expected, errorMessage) { 58 assert_approx_equals( 59 anim.effect.getComputedTiming().progress, 60 expected, epsilon, errorMessage); 61 } 62 63 function assert_opacity_equals(expected, errorMessage) { 64 assert_approx_equals( 65 parseFloat(getComputedStyle(target).opacity), expected, epsilon, 66 errorMessage); 67 } 68 69 function assert_translate_x_equals(expected, errorMessage) { 70 const style = getComputedStyle(target).transform; 71 const regex = /matrix\(([^\)]*)\)/; 72 const captureGroupIndex = 1; 73 const translateIndex = 4; 74 const match = style.match(regex)[captureGroupIndex]; 75 const translateX = parseFloat(match.split(',')[translateIndex].trim()); 76 assert_approx_equals(translateX, expected, epsilon, errorMessage); 77 } 78 79 function assert_property_equals(property, expected, errorMessage) { 80 const value = parseFloat(getComputedStyle(target)[property]); 81 assert_approx_equals(value, expected, epsilon, errorMessage); 82 } 83 84 promise_test(async t => { 85 await waitForNextFrame(); 86 const anims = document.getAnimations(); 87 assert_equals(anims.length, 1, 88 "Should have one animation attatched to the view-timeline"); 89 const anim = anims[0]; 90 await anim.ready; 91 await waitForNextFrame(); 92 93 // @ contain 0% 94 scroller.scrollTop = 700; 95 await waitForNextFrame(); 96 assert_progress_equals(anim, 0, 'progress at contain 0%'); 97 assert_translate_x_equals(100, 'translation at contain 0%'); 98 assert_opacity_equals(1/3, 'opacity at contain 0%'); 99 assert_property_equals('margin-left', 5, 'margin-left at contain 0%'); 100 assert_property_equals('margin-right', 10, 'margin-right at contain 0%'); 101 102 // @ contain 50% 103 scroller.scrollTop = 750; 104 await waitForNextFrame(); 105 assert_progress_equals(anim, 0.5, 'progress at contain 50%'); 106 assert_translate_x_equals(150, 'translation at contain 50%'); 107 assert_opacity_equals(0.5, 'opacity at contain 50%'); 108 assert_property_equals('margin-left', 7.5, 'margin-left at contain 50%'); 109 assert_property_equals('margin-right', 7.5, 'margin-right at contain 50%'); 110 111 // @ contain 100% 112 scroller.scrollTop = 800; 113 await waitForNextFrame(); 114 assert_progress_equals(anim, 1, 'progress at contain 100%'); 115 assert_translate_x_equals(200, 'translation at contain 100%'); 116 assert_opacity_equals(2/3, 'opacity at contain 100%'); 117 assert_property_equals('margin-left', 10, 'margin-left at contain 100%'); 118 assert_property_equals('margin-right', 5, 'margin-right at contain 100%'); 119 }, 'ViewTimeline with timeline offset keyframes outside [0,1]'); 120 } 121 122 window.onload = runTest; 123 </script> 124 </html>