const overlay = document.getElementById('offline-overlay');

const stopJS = document.getElementById('stopJS');

const heartbeat = () => {
    overlay.classList.remove("animate-overlay");
    void overlay.offsetWidth;
    overlay.classList.add("animate-overlay");
}

const heartbeatInterval = setInterval(heartbeat, 1000);

stopJS.addEventListener("click", function () {
    clearInterval(heartbeatInterval);
});