JSFiddle - React, Tailwind, and code Playground

HTML

<select>
    <option value="a">a</option>
    <option value="b">b</option>
    <option value="c">c</option>
</select>
<button id="a">a</button>
<button id="b">b</button>
<button id="c">c</button>

JavaScript

$('button').on('click', function() {
    var id = $(this).attr('id');
    $('select').val(id);
});