You can edit / change the code and click run button
<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> <script src="../../../ajax/libs/jquery/1-11-3/jquery.min.js"></script> <script> $(document).ready(function(){ $("button").click(function(){ $("p").removeClass("badClass"); }); }); </script> <style> .badClass { font-size: 120%; color: blue; } </style> <script>var clicky_site_ids = clicky_site_ids || []; clicky_site_ids.push(101319977);</script><script async src="//static.getclicky.com/js"></script></head> <body> <h1>If you click on the below button, it will remove the <font color="blue">blue</font> color style from the paragraphs</h1> <p class="badClass">I am styled with badClass</p> <p class="badClass">If you remove badClass from me, I won't have style anymore!!!!.</p> <button>Remove the "badClass" from all p elements</button> </body> </html>