JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://cdnjs.cloudflare.com/ajax/libs/select2/3.4.6/select2.min.css">
<script src="http://cdnjs.cloudflare.com/ajax/libs/select2/3.4.6/select2.min.js"></script>
<select multiple id="options" size="9">
    <option value="357">One</option>
    <option value="358">Two</option>
    <option value="359">Three</option>
    <option value="360">Four</option>
    <option value="361">Five</option>
</select>

CSS

select {
    width: 300px;
}

JavaScript

$('#options').select2({
    "placeholder": "Pick multiple options",
        "closeOnSelect": false
});