<!DOCTYPE html>
<html>
<head>
<script src="/lib/jquery-1.12.2.min.js"></script>
<script>
$(document).ready(function(){
    $("div > span").css("background-color", "yellow");
});
</script>
</head>
<body>    

<h2>What will $("div > span") select?</h2>

<h4>This div element has two direct child elements, p and span:</h4>

<div style="border:1px solid black;padding:10px;">
  <p>This is a paragraph.</p>
  <span>This is a text inside a span.</span>
</div>

<h4>This div element has one direct child element, p:</h4>

<div style="border:1px solid black;padding:10px;">
  <p>This is a paragraph. <span>This is a span element, inside the paragraph.</span></p>
</div>

</body>
</html>