Source Code:
<!DOCTYPE html> <html> <head> <script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"> </script> <script> $(document).ready(function(){ $("p:only-child").css("background-color","yellow"); }); </script> </head> <body> <div style="border:1px solid;"> <p>The first child.</p> <p>The last child.</p> </div><br> <div style="border:1px solid;"> <p>The only child.</p> </div><br> <div style="border:1px solid;"> <span>The first child.</span> <p>The last child.</p> </div><br> </body> </html>
Result:
W3Schools.com
- Try it yourself