JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <select>
        <option>Um</option>
        <option>Dois</option>
    </select>
</div>

CSS

div {
    width:200px;
    border:1px solid;
    background:#999;
    overflow:hidden
}

select {
    background:transparent;
    width:240px;
    border:0;
    outline:0;
}