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Test Info:

<!DOCTYPE html>
<html>
<head>
<title>CSS Masking: Test animating single-value arc radius of the shape() function</title>
<link rel="match" href="clip-path-interpolation-shape-arc-direction-agnostic-radius-ref.html">
<meta name="fuzzy" content="maxDifference=0-10;totalPixels=0-360">
</head>
<style>
@keyframes animate-shape {
from {
clip-path: shape(from 40px 100px, arc to 200px 100px of 50% small cw, arc to 0 100px of 30% small cw);
}
to {
clip-path: shape(from 40px 100px, arc to 200px 100px of 30% small cw, arc to 0 100px of calc(10px + 45%) small cw);
}
}
#shape {
width: 400px;
height: 300px;
background: green;
animation: animate-shape 100s;
animation-play-state: paused;
animation-timing-function: steps(2, start);
}
</style>
<div id="shape"></div>
</html>