JSFiddle - React, Tailwind, and code Playground

HTML

<select id="monSelect">
    <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
    <option value="4">4</option>
    <option value="5">5</option>
    <option value="6">6</option>
    <option value="7">7</option>
</select>

JavaScript

$(function() {
    var row = 0;
    alert(row);
    $("#monSelect option").click(function() {
        row = $(this).val();
        alert(row);
    });
});