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css-filters-animation-contrast.html
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<!DOCTYPE html>
<html>
<head>
<title>CSS Filters Animation: Contrast</title>
<link rel="author" title="Gunther Brunner" href="mailto:[email protected]">
<link rel="reviewer" title="Dirk Schulze" href="mailto:[email protected]">
<link rel="reviewer" title="Rebecca Hauck" href="mailto:[email protected]">
<link rel="help" href="http://www.w3.org/TR/filter-effects-1/#FilterProperty">
<link rel="help" href="http://www.w3.org/TR/filter-effects-1/#funcdef-contrast">
<link rel="help" href="http://www.w3.org/TR/css3-animations/#animations">
<link rel="match" href="css-filters-animation-contrast-ref.html">
<meta name="assert" content="The black square should be gray">
<style type="text/css">
@keyframes animate {
0% {
filter: contrast(0%);
}
100% {
filter: none;
}
}
.square {
width: 100px;
height: 100px;
background: black;
animation-name: animate;
animation-play-state: paused;
animation-delay: -2s;
animation-duration: 4s;
animation-timing-function: linear;
}
</style>
</head>
<body>
<p>You should see a gray rectangle. Neither black nor white.</p>
<div class="square"></div>
</body>
</html>