JSFiddle - React, Tailwind, and code Playground

HTML

<select id="List">
    <option value="select">Select</option>
    <option value="volvo">Volvo</option>
    <option value="saab">Saab</option>
	<option value="new">new</option>
	<option value="old">old</option>
</select>
<input type="button" id="delete"
 value="delete" />
<br />

<input type='text' id="readme" /><input id="add" type="button" value="add" /><br />

JavaScript

$('#add').on('click',function(){
    $("#List").append('<option>'+$('#readme').val()+'</option>');
});
$('#delete').on('click',function(){
    $("#List option:selected").remove();
});