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<!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>