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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="help" src="https://drafts.csswg.org/scroll-animations-1/">
<script src="/web-animations/testcommon.js"></script>
<style>
.scroller {
height: 200px;
width: 500px;
overflow: auto;
position: absolute;
top: 100px;
}
.anim {
position: absolute;
width: 100px;
height: 100px;
background: darkred;
}
.anim.contain {
background: green;
}
.spacer {
height: 1000px;
}
.before {
top: 450px;
}
.after {
top: 50px;
}
.contain {
top: 250px;
}
.indicator {
position: fixed;
top: 50px;
}
.contain .indicator {
top: 100px;
}
.contain .indicator:nth-child(2) {
left: 200px;
}
.after .indicator {
left: 200px;
}
.indicator > div {
display: inline-block;
width: 25px;
height: 25px;
position: relative;
border-radius: 100%;
box-sizing: border-box;
border: 2px solid black;
padding: 3px;
background: lightgray;
background-clip: content-box;
}
.indicator > div > div {
width: 100%;
height: 100%;
border-radius: 100%;
background: green;
opacity: 1;
will-change: opacity;
}
</style>
</head>
<body>
<p>All of the activity indicators should be active as the animations should be filling.</p>
<div class="scroller">
<div class="anim after"><div class="indicator">After cover phase: <div><div></div></div></div></div>
<div class="anim before"><div class="indicator">Before cover phase: <div><div></div></div></div></div>
<div class="anim contain">
<div class="indicator entry">After entry phase: <div><div></div></div></div>
<div class="indicator exit">Before exit phase: <div><div></div></div></div>
</div>
<div class="spacer"></div>
</div>
</body>
<script>
function run() {
let scroller = document.querySelector('.scroller');
scroller.scrollTo({top: 200});
}
run();
</script>
</html>
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