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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(){ $("<span><b>Hello world!</b></span>").replaceAll("p:last-child"); }); }); </script> </head> <body> <button>Replace every p element that is the last child of its parent, with a bold span element</button><br><br> <div style="border:1px solid"> <p>The first paragraph in div.</p> <p>The last paragraph in the div.</p> </div><br> <div style="border:1px solid"> <p>The first paragraph in another div.</p> <p>The last paragraph in another div.</p> </div> </body> </html>
