CSS Animatable inset-block-start Property Example

<!DOCTYPE html>
<html>
<head>
<style> 
#container {
    font-size: 20px;
    margin: auto;
  	height:300px;
  	position: relative;
    background: #333;
	box-shadow: 0 0 10px 0 #aaa;
}
  
#inset-container {
  	position: absolute;
    display: flex;
    justify-content: center;
    width: 100%;
    inset-block: 50px 0;
    align-items: center;
  	background-color:lightblue;
    animation: anim 5s infinite;
}

@keyframes anim {
  50% {inset-block-start: 100px;}
}
</style>
</head>
<body>

<h1>Animatable 'inset-block-start' Property</h1>
<hr>
  
<p>Experience the changing inset-block-start property.</p>

<div id="container">
  <div id="inset-container">
    Container
  </div>
</div>

</body>
</html>