add id 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 id="a">Hello Again</span>
<script>
var collection = $( "p" );
// Capture the new collection
collection = collection.add( document.getElementById( "a" ) );
collection.css( "background", "yellow" );
</script>
</body>
</html>
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>append demo</title>
<style>
p {
background: yellow;
}
</style>
<script src="https://code.jquery.com/jquery-3.5.0.js"></script>
</head>
<body>
<strong>Hello world!!!</strong>
<p>I would like to say: </p>
<script>
$( "p" ).append( $( "strong" ) );
</script>
</body>
</html>
<!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 id="a">Hello Again</span>
<script>
$( "p" ).add( document.getElementById( "a" ) ).css( "background", "yellow" );
</script>
</body>
</html>
