<html>
<head>
<script src="../../ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"></script>
<script>
$(document).ready(function(){
$("#btn1").click(function(){
$("div").data("greeting", "Hello World");
});
$("#btn2").click(function(){
alert($("div").data("greeting"));
});
});
</script>
</head>
<body>
<button id="btn1">Attach data to div element</button><br>
<button id="btn2">Get data attached to div element</button>
<div></div>
</body>
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</html>