Generate a heartbeat event every 10 seconds when page tab is active

heartbeat

const CURRENT_PAGE='homepage' // whatever current page and/or pod id is
const poller=(page) => {
  console.log(page)
  return setInterval(() => {
          let faux_segment_event={
            'event': 'pods_heartbeat',
            'page': page,
            'timestamp': new Date().toUTCString(),
          }
          console.log('❤️🩺',faux_segment_event)
        },10000)
}
const heartbeat={'poller': poller(CURRENT_PAGE)} // initializes heartbeat on page load
document.addEventListener('visibilitychange', function () {
    if (document.hidden) {
        console.log('💔 FAREWELL');
        clearInterval(heartbeat.poller)
    } else {
        console.log('😍 WELCOME BACK');
        heartbeat.poller=poller(CURRENT_PAGE)
    }
});