JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://semantic-ui.com/dist/semantic.css">
<script src="http://semantic-ui.com/dist/semantic.js"></script>
<select id="test" class="ui dropdown">
    <option value="">Select an option...</option>
    <option value="A">Apple</option>
    <option value="B">Banana</option>
</select>

CSS

body {
    padding: 1em;
}

JavaScript

// Add javascript here

$('#test').dropdown();

$('#test').dropdown('set selected','B');