is data-hover js code example
Example 1: javascript on hover
<img onmouseover="enlargeImage(this)" border="0" src="smiley.gif" alt="Smiley" width="32" height="32">
<script>
function enlargeImage(x) {
x.style.height = "64px";
x.style.width = "64px";
}
</script>
Example 2: on hover event
onmouseover event