JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://code.jquery.com/jquery-1.6.4.min.js"></script>
<script src="http://code.jquery.com/mobile/1.0/jquery.mobile-1.0.min.js"></script>
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.0/jquery.mobile-1.0.min.css">
<div id="cont" data-role="fieldcontain">
    <label for="select-choice-1" class="select">Choose shipping method:</label>
    <select style="font-weight: normal" name="select-choice-1" id="select-choice-1">
        <option value="standard">Standard: 7 day</option>
        <option value="rush">Rush: 3 days</option>
        <option value="express">Express: next day</option>
        <option value="overnight">Overnight</option>
    </select>
</div>

CSS

#cont .ui-btn-text{font-weight:normal;}

JavaScript

//$('#select-choice-1').css("font-weight", "normal");