JSFiddle - React, Tailwind, and code Playground

HTML

<select id="sel1">
<option>1</option>
<option>2</option>
<option>3</option>
</select>

<select id="sel2">
<option>1</option>
<option>2</option>
<option>3</option>
</select>

JavaScript

$(document).ready(function(){
    $("#sel2").html($("#sel1").html());
});