JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//code.jquery.com/jquery.min.js"></script>
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<link rel="stylesheet" href="//davidstutz.github.io/bootstrap-multiselect/dist/css/bootstrap-multiselect.css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.9.1.js"></script>
<script src="//davidstutz.github.io/bootstrap-multiselect/dist/js/bootstrap-multiselect.js"></script>
<div class="btn-group">
    <select id="example-onInitialized" multiple="multiple" class="multiple">
        <option value="1">Option 1</option>
        <option value="2">Option 2</option>
        <option value="3">Option 3</option>
        <option value="4">Option 4</option>
        <option value="5">Option 5</option>
        <option value="6">Option 6</option>
    </select>
</div>

JavaScript

$('.multiple').multiselect({
   onInitialized: function(select, container) {
                   $('.multiple').multiselect('select', 2);
                }
                });