Tryit Editor v2.9

Edit This Code:
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script>
<script>
$(document).ready(function(){
    $("button").click(function(){
        $("<span>Hello world!</span>").insertBefore("p");
    });
});
</script>
</head>
<body>

<button>Insert span element before each p element</button>

<br><br>
<p>This is a paragraph.</p>
<p>This is another paragraph.</p>

</body>
</html>