JSFiddle - React, Tailwind, and code Playground

HTML

<select class="birth-month" name="month"  value="3" data-dateVal="4">
    <option value="0">Month</option><option value="1">Jan</option><option value="2">Feb</option><option value="3">Mar</option><option value="4">Apr</option><option value="5">May</option><option value="6">Jun</option><option value="7">Jul</option><option value="8">Aug</option>
</select>

CSS

select {
width:106px;
height:40px;
border:0;
background-color:#eee;
color:grey;
font-size:14px;
-webkit-appearance:none;
outline:none;
border-radius:0;
}