JSFiddle - React, Tailwind, and code Playground

HTML

<select name="" id="">
    <option value="não escolhida">Não escolhida</option>
    <option value="escolhida" selected>Escolhida</option>
</select>

JavaScript

var select = document.querySelector('select');
options = select.querySelectorAll('option');
options[select.selectedIndex].removeAttribute("selected");