add id in the first code example
Example 1: add id jquery
$('element').attr('id', 'value');
Example 2: how to add id in jquery
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>add demo</title>
<script src="https://code.jquery.com/jquery-3.5.0.js"></script>
</head>
<body>
<p>Hello</p>
<span>Hello Again</span>
<script>
$( "p" ).add( "span" ).css( "background", "yellow" );
</script>
</body>
</html>