content-visibility-animation-becomes-visible.html (1531B)
1 <!DOCTYPE html> 2 <html class="reftest-wait"> 3 <title>Test that making a content-visibility: hidden subtree visible restarts animations in it</title> 4 <link rel="author" title="Rob Buis" href="mailto:rbuis@igalia.com"> 5 <link rel="help" href="https://drafts.csswg.org/css-contain-2/"> 6 <link rel="match" href="content-visibility-animation-becomes-visible-ref.html"> 7 <meta name="assert" content="animations in content-visibility: hidden subtree should restart once visible"> 8 9 <script src="/common/reftest-wait.js"></script> 10 11 <style> 12 #container { 13 content-visibility: hidden; 14 } 15 @keyframes fade { 16 from { opacity: 0; transform: none; } 17 to { opacity: 1; transform: translate(100px); } 18 } 19 #target { 20 background: green; 21 height: 100px; 22 width: 100px; 23 } 24 .animate { 25 animation: fade 1s linear 1 alternate; 26 animation-fill-mode: forwards; 27 } 28 </style> 29 <body> 30 <div id="container"></div> 31 </body> 32 33 <script> 34 function createAnimatingElement(name) { 35 const container = document.getElementById('container'); 36 const target = document.createElement('div'); 37 container.appendChild(target); 38 target.id = 'target'; 39 target.className = name; 40 return target; 41 } 42 43 function runTest() { 44 const container = document.getElementById('container'); 45 const target = createAnimatingElement('animate'); 46 container.style.contentVisibility = "visible"; 47 const listener = (e) => { 48 takeScreenshot(); 49 }; 50 51 target.addEventListener("animationend", listener); 52 } 53 window.onload = () => requestAnimationFrame(() => requestAnimationFrame(runTest)); 54 </script>