JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/css/select2.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/js/select2.min.js"></script>
<select>
<option>A</option>
<option>B</option>
</select>

<select id="sample">
<option>C</option>
<option>D</option>
</select>

JavaScript

$(function(){
$('#sample').after('<select><option>1</option><option>2</option></select>');
	$('select').select2();
});