JSFiddle - React, Tailwind, and code Playground

HTML

<select id="the-select" class="cls-select" style="font-size: 5em">
<option>one</option>
<option>two</option>
</select>

CSS

.cls-select {
  width:100%;
}

JavaScript

// uncommenting code will delete select stylings


var selects = document.getElementsByTagName("select");
if (selects !== undefined && selects.length > 0) {
    for (i=0; i < selects.length; i++) {
        selects[i].className="";
        selects[i].style="";
    }
}