JSFiddle - React, Tailwind, and code Playground

HTML

<select id="select_test" multiple="multiple">
    <option style="color: blue;">Low</option>
    <option>Medium</option>
    <option>High</option>
</select>
<h3>test</h3><h2>test2</h2>

<input type="button" id="emptySelect" value="Add Options" />

JavaScript

$("#emptySelect").click(function() {
    newOption = document.createElement('option');
    newOption.value = 'bmw';
    newOption.text="Kiwi";          document.getElementById("select_test").add(newOption,null);
});