JSFiddle - React, Tailwind, and code Playground
HTML
<select id="SelectElement">
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
<option value="vw">VW</option>
<option value="audi">Audi</option>
</select>
JavaScript
function SelectElementValue(value)
{
document.getElementById('SelectElement').selectedIndex = value; ;
}
SelectElementValue('2')
// Immer beginnend bei "0"