JSFiddle - React, Tailwind, and code Playground

by andrelaszlo

HTML

<form>
    <select id="selectme">
        <option value="">-- Please select one --</option>
        <option value="1">1</option>
        <option value="2">Two</option>
        <option value="3">III</option>
    </select> 
    <input type="submit" value="submit" id="clickme">
</form>

CSS

#clickme {
    background-color: #f00;
}

#clickme:disabled {
    background-color: #eee;
}

JavaScript

$(function(){
    $("#clickme").prop("disabled", true);
    $("#selectme").change(function(){
        if ($("#selectme").val() != "") {
            $("#clickme").removeAttr("disabled");
        } else {
            $("#clickme").prop("disabled", true);
        }
    });
})