<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<link href="https://cdn.jsdelivr.net/npm/select2@4.0.13/dist/css/select2.min.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/select2@4.0.13/dist/js/select2.min.js"></script>
</head>
<body>
<select class="js-example-basic-single" name="state">
<option value="">--Select--</option>
<option value="AL">Alabama</option>
<option value="WY">Wyoming</option>
</select>
<script>
$(document).ready(function() {
$('.js-example-basic-single').select2(
{
placeholder: "Select a state",
allowClear: true
}
);
});
</script>
</body>
</html>
