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"