JSFiddle - React, Tailwind, and code Playground
HTML
<button>Reset</button>
<select>
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select>
<option>a</option>
<option>b</option>
<option>c</option>
</select>
JavaScript
$("button").click(function() {
$('select').prop('selectedIndex', 0);
});