JSFiddle - React, Tailwind, and code Playground

HTML

<select>
    <option>aaaaa</option>
    <option>bbbbb</option>
    <option>ccccc</option>
</select>

<button>button</button>

JavaScript

$('button').on('click', function() {
    $('select').trigger('click');
});

$('select').click(function(){
alert($(this).val());
});