JSFiddle - React, Tailwind, and code Playground

HTML

<div class="selCont">
        <h2>pick an option</h2>
        <select id="my-dropdown" name="my-dropdown">
            <option value="0">Please Select</option>
            <option value="1">West</option>
            <option value="2">Land</option>
            <option value="3">Easter</option>
            <option value="4">Springtime</option>
            <option value="5">Celtic</option>
            <option value="6">Spectacular/</option>
            <option value="7">Weekend</option>
            <option value="8">Dark</option>
            <option value="9">Treasures</option>
        </select>
<button class="go-btn" type="submit">
Go
</button>
</div>

JavaScript

$('.go-btn').click(function() {
    var selected = $('#my-dropdown option[selected]');
    alert(selected.val()); 
});