JSFiddle - React, Tailwind, and code Playground

HTML

<select id="dropDown">
<option value="1">test</option>
<option value="2">test</option>
<option value="3">test</option>
<option value="4">test</option>
<option value="5">test</option>
<option value="x">test</option>
</select>

JavaScript

$(document).ready(function(){
    $("<option value='X' selected='selected'></option>").insertBefore($("select option")[0]);
$("select").change(function(){
    $("select option[value='X']").remove();
});
});