JSFiddle - React, Tailwind, and code Playground

HTML

<select name="education" id="education" multiple="multiple">
    <option value="Bachelor">Bachelor's</option>
    <option value="Master">Master's</option>
    <option value="PhD">PhD</option>
</select>

<div id="hitme">hitme</div>

JavaScript

$('#hitme').on('click', function(){
     alert($('#education').val());
     $('#education').val(['Bachelor', 'Master', 'PhD']);
 });