JavaScript Tutorial

add()

<!DOCTYPE html>
<html>
<head>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
    <script>
        $(document).ready(function(){
            $("h1").add("p").add("span").css("background-color", "yellow");
        });
    </script>
</head>
<body>
    <h1>Welcome</h1>
    <p>A p element.</p>
    <p>Another p element.</p>
    <span>A span element.</span>
    <span>A span element.</span><br><br>
    <div>This example adds the same css style for both p and span elements, as the existing h1 element.</div>
</body>
</html>