JSFiddle - React, Tailwind, and code Playground

by apoucoz

JavaScript

window.onbeforeunload = function (evt) {
    var message = "Уже уходите с apo-ucoz?";
    if (typeof evt == "undefined") {
        evt = window.event;
    }
    if (evt) {
        evt.returnValue = message;
    }
    return message;
}