JSFiddle - React, Tailwind, and code Playground

HTML

<select id="ComboBox" >
          <option value="1">Value 1</option>
         <option value="2">Value 2</option>
        <option value="3">Value 3</option>
        <option value="4">Value 4</option>
     </select>

JavaScript

$("#ComboBox").val(2);