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<html>
<head>
<style>
@keyframes longer {
from {width: 100px;}
to {width: 200px;}
}
@-moz-keyframes longer {
from {width: 100px;}
to {width: 200px;}
}
@-webkit-keyframes longer {
from {width: 100px;}
to {width: 200px;}
}
@-o-keyframes longer {
from {width: 100px;}
to {width: 200px;}
}
#animator {
width: 100px;
height: 100px;
background: red;
}
.animation {
animation: longer 0.5s;
-moz-animation: longer 0.5s;
-webkit-animation: longer 0.5s;
-o-animation: longer 0.5s;
}
</style>
</head>
<body>
<div id="animator" class="animation"></div>
<script>
var animator = document.getElementById('animator');
animator.addEventListener('animationend', endHandler);
function endHandler() {
animator.removeEventListener('animationend', endHandler);
animator.className = '';
setTimeout(function () {
animator.className = 'animation';
}, 0);
}
</script>
</body>
</html>
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