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<html><head><script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.1/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></html>