JSFiddle - React, Tailwind, and code Playground

HTML

<select id='select'>
  <option value='one' selected=true>One</option>
  <option value='two'>Two</option>
  <option value='three'>Three</option>
</select>

<button id="reset">Reset</button>

JavaScript

document.getElementById('reset').onclick = function() {
    document.querySelector('option[selected]').selected = true;
};