<html>
<head>
<style>
#myDIV {
background-color:lightblue;
height: 50px;
inline-size: 100px;
overflow: hidden;
animation: mymove 5s infinite;
}
@keyframes mymove {
50% {inline-size: 250px;}
}
</style>
</head>
<body>
<h1>Animation of inline-size</h1>
<p>Gradually change the inline-size property from 100px to 250px, and back to 100px:<p>
<div id="myDIV">
This is my DIV element.
</div>
</body>
</html>