<html>
<head>
<script src="../../ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"></script>
<script>
$(document).ready(function(){
$("button").click(function(){
var $x = $("div");
$x.prop("color", "FF0000");
$x.append("The color property has the following value: " + $x.prop("color"));
$x.removeProp("color");
$x.append("<br>Now the color property has the following value: " + $x.prop("color"));
});
});
</script>
</head>
<body>
<button>Add and remove a property</button><br><br>
<div></div>
</body>
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</html>