JSFiddle - React, Tailwind, and code Playground

HTML

<table>
<tr>
    <td class="mainstuff" style="padding-right:0; width:1%; ">
<select id="stuff" class="boxed" title="" name="stuff">
    <option value="9100" title="Something:">9100</option>
</select>
</td>
</tr>
</table>
<input type="button" id="clickMe" value="Click Me"/>

JavaScript

$("#clickMe").click(function() {
    var html = "<input id='stuff' type='textbox' value=" + $("#stuff option:first").val() + " />";
    $("#stuff").remove();
    $(".mainstuff").append(html);
});