JSFiddle - React, Tailwind, and code Playground

HTML

<select id="someotherid">
    <option value="1">1</option>
    <option value="2" selected>2</option>
</select>
<select id="test">
    <option value="1">1</option>
    <option value="2" selected>2</option>
</select>

JavaScript

$(document).ready(function() {
   var res = $("#someotherid").val();
    $("#test").val(res);
});