JSFiddle - React, Tailwind, and code Playground

HTML

<select id="test">
    <option value="1">1v</option>
    <option value="2">2v</option>
    <option value="3">3v</option>
    <option value="4">4v</option>
</select>

JavaScript

;
var PrimerSelect = {
    init: function () {
        $("#test").change(function () {
            //alert($("#test option:selected").val()); //a moze i ovako
            alert($(this).val());
        });
    }
};

var test = function(dada){
    alert(dadada);
}

$(PrimerSelect.init);
$(test());