<!DOCTYPE html>
<html>
<head>
<script src="/lib/jquery-1.12.2.min.js"></script>
<script>
$(document).ready(function(){
$("#btn1").click(function(){
$("div").data("greeting", "Hello World");
alert("Greeting is: " + $("div").data("greeting"));
});
$("#btn2").click(function(){
$("div").removeData("greeting");
alert("Greeting is: " + $("div").data("greeting"));
});
});
</script>
</head>
<body>
<button id="btn1">Attach data to div element</button><br>
<button id="btn2">Remove data attached to div element</button>
<div></div>
</body>
</html>