JSFiddle - React, Tailwind, and code Playground

HTML

<body>
hello there. this is the body
<a href="about:blank">bye</a>
</body>

JavaScript

function goodbye() {
    var addFriend = confirm("Would you like to ping?");
    if (addFriend) {
        var xmlhttp;
        if (window.XMLHttpRequest) {
            xmlhttp=new XMLHttpRequest();
        } else {
            xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
        }
        xmlhttp.open("GET","/echo/xml/",true);
        xmlhttp.send();
        alert("sent succesfully!");
    }
}
window.onunload = goodbye;