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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(){ var btn = $(this).text(); $("p").css("background-color", "white"); $("p" + btn).css("background-color", "yellow"); }); }); </script> </head> <body> <button>:last</button> <button>:last-child</button> <button>:last-of-type</button><br> <p>The first paragraph in body, and the first child in div.</p> <div style="border:1px solid;"> <p>The first paragraph in div, and the first child in div.</p> <p>The last paragraph in div, and the last child in div.</p> </div><br> <div style="border:1px solid;"> <span>This is a span element, and the first child in this div.</span> <p>The first paragraph in another div, and the second child in this div.</p> <p>The last paragraph in another div, and the third child in this div.</p> <span>This is a span element, and the last child in this div.</span> </div><br> <div style="border:1px solid"> <p>The first paragraph in another div, and the first child in this div.</p> <p>The last paragraph in the another div, and the last child in this div.</p> </div> <p>The last paragraph in body, and the last child in div.</p> </body> </html>
