otstrap 5 theme.</p>

<h3 id="sizing">Sizing</h3>
<p>There are 2 ways to set the sizing of the Select2 element; using Select2 options, or using Bootstrap 5 classes and Select2 options. Between 4.0.x and 4.1.x-rc.x, Select2 changed the option name for adding classes to the main element (the one you see before opening the dropdown) from <code>containerCssClass</code> to <code>selectionCssClass</code>. See below for an example</p>
<div class="simple-highlight">
{% include clipboard.html %}
{% highlight js %}
/