CSS rotate Property - Playground Example

<!DOCTYPE html>
<html>
<head>
<style type="text/css">
.box {
  display: inline-block;
  margin: 1em;
  min-width: 6.5em;
  line-height: 6.5em;
  text-align: center;
  transition: 1s ease-in-out;
  border: 0.25em dotted;
}

#box1:hover {
  rotate: 90deg;
}

#box2:hover {
  rotate: y 180deg;
}

#box3:hover {
  rotate: 1 2 1 360deg;
}
</style>
</head>
<body>
<div class="box" id="box1">rotate Z</div>
<div class="box" id="box2">rotate Y</div>
<div class="box" id="box3">vector & angle</div>
</body>
</html>