JSFiddle - React, Tailwind, and code Playground

by meridius

HTML

<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/select2/4.0.0/js/select2.min.js"></script>

	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
	<link rel="stylesheet" href="//select2.github.io/dist/css/select2.min.css">
	<link rel="stylesheet" href="https://raw.githubusercontent.com/select2/select2-bootstrap-theme/master/dist/select2-bootstrap.min.css">
<div class="row">
    <div class="col-xs-6">
        <button type="button" class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">Launch demo modal</button>
    </div>
    <div class="col-xs-6">
        <select name="qwer" class="select2">
            <option value="1">a</option>
            <option value="2">b</option>
            <option value="3">c</option>
        </select>
    </div>
</div>
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
    <div class="modal-dialog" role="document">
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span>

                </button>
                 <h4 class="modal-title" id="myModalLabel">Modal title</h4>

            </div>
            <div class="modal-body">
                <div class="row">
                    <div class="col-xs-6">
                        <select name="asdf" class="select2">
                            <option value="1">a</option>
                            <option value="2">b</option>
                            <option value="3">c</option>
                        </select>
                    </div>
                </div>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
               ...

CSS

/*
.select2-container {
    width: 100% !important;
    padding: 0;
}
*/

JavaScript

$(document).ready(function () {
    //$.fn.modal.Constructor.prototype.enforceFocus = function () {}; // so Select2 v4.0.0 can get focus in modal
    $('.select2').select2({
        theme: "bootstrap3"
    });
});