<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>demo</title>
<style>
div {
position: absolute;
width: 200px;
height: 60px;
line-height: 60px;
text-align: center;
border: 1px solid #666;
cursor: pointer;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
transition: all 0.1s;
}
div:hover {
box-shadow: 0 0 0 50vmax rgba(0, 0, 0, 0.5);
/*transform: translate(-50%, -60%);*/
}
</style>
</head>
<body>
<div>Hover Me</div>
</body>
</html>