<!DOCTYPE html>
<html lang="en-US">
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> <style>
div{
border: 1px solid black;
margin: 10px 0px;
}
</style>
</head>
<body>
<h1>jQuery :only-child Selector</h1>
<p>This is paragraph1</p>
<div>
<p>This is paragraph1</p>
</div>
<div>
<p>This is paragraph1</p>
<p>This is paragraph2</p>
</div>
<div>
<p>This is paragraph1</p>
<a href="/css">Learn CSS</a>
</div>
<script>
$(document).ready(function(){
$("p:only-child").css("color","green");
});
</script> </body>
</html>