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<!DOCTYPE html> <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(){ $("p").css("background-color", "yellow"); }); }); </script> </head> <body> <h2>This is a heading</h2> <p style="background-color:#ff0000">This is a paragraph.</p> <p style="background-color:#00ff00">This is a paragraph.</p> <p style="background-color:#0000ff">This is a paragraph.</p> <p>This is a paragraph.</p> <button>Set background-color of p</button> </body> </html>
