To implement animation on min-width property with CSS, you can try to run the following code
Example
<!DOCTYPE html>
<html>
<head>
<style>
div {
overflow: auto;
width: 50%;
background-color: blue;
color: white;
border: 1px solid black;
animation: myanim 3s infinite;
}
@keyframes myanim {
30% {
min-width: 550px;
}
}
</style>
</head>
<body>
<h1>Example of min-width</h1>
<div>
<p>This is demo text. This is demo text. This is demo text.
This is demo text. This is demo text. This is demo text.
This is demo text. This is demo text. This is demo text.
This is demo text. This is demo text. This is demo text.
This is demo text. This is demo text. This is demo text.
This is demo text. This is demo text. This is demo text.
This is demo text. This is demo text. This is demo text.
</p>
</div>
</body>
</html>