JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">
<script src="http://code.jquery.com/jquery-2.1.4.min.js"></script>
<script src="https://code.jquery.com/jquery-2.1.4.min.js"></script>
<button id="btnOK" class="btn btn-primary btn-sm" href="#">
    
                    <i class="fa fa-upload"></i> OK</button>

JavaScript

$(document).ready(function(){
    alert("Ready");
    $("#btnOK").attr("disabled", "disabled");
    
    $("#btnOK").click(function(){
        alert("Ok clicked");
    });
});