JSFiddle - React, Tailwind, and code Playground

HTML

<label>
    <select>
       <option value="0">Zero</option>
       <option value="1">One</option>
    </select>
</label>

CSS

label:after {
    content:'\25BC';
    display:inline-block;
    box-sizing:border-box;
    color:#000;
    background-color:#fff;
    border:1px solid #999;
    margin-left:-17px;   /* remove the damn :after space */
    pointer-events:none; /* let the click pass trough */
}