<html> <head> <title>jQuery only child example</title> <script type="text/javascript" src="jquery-1.9.1.js"></script> </head> <body> <h1>jQuery only child example</h1> <ul> <li>ABC #1</li> <li>ABC #2</li> <li>ABC #3</li> <li>ABC #4</li> <li>ABC #5</li> </ul> <ul> <li>DEF #1</li> </ul> <div> <p>Only div</p> </div> <ul> <li>GHI #1</li> <li>GHI #2</li> </ul> <button>li:only-child</button> <button>:only-child</button> <script type="text/javascript"> $("button").click(function () { var str = $(this).text(); $("li").css("background", "white"); $(str).css("background", "coral"); }); </script> </body> </html>