JQuery Add with css()

In this example we are add javascript element with css() method and this will be change the background color of text

<!Doctype html>
<html>
<head>
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"></script>
</head>
<body>
 
<h1>Appwrk IT Solution</h1>
<span id="span1" style="font-size: 30px">Best software company!</span>
 
<script>
$( "h1" ).add( document.getElementById( "span1" ) ).css( "background", "cyan" );
</script>
 
</body>
</html>

Output