JSFiddle - React, Tailwind, and code Playground

HTML

<select id="mainMenu" data-mini="true" name="select-choice-min">
   <option value="1">1</option>
   <option value="2">2</option>
   <option value="3">3</option>
   <option value="4">4</option>
   <option value="5">5</option>
   <option value="6">6</option>   
</select>

JavaScript

$("#mainMenu").val("5");
$("#mainMenu").selectmenu('refresh', true);