JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/select2/3.5.2/select2.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/select2/3.5.2/select2.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/select2/3.5.2/select2-bootstrap.css">
<select class="select2-select" multiple="multiple">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>

CSS

.select2-container {
    width: 400px;
}

JavaScript

$('.select2-select').select2({
    maximumSelectionSize: 1
});