Exit Intent Popup Detection

<script>
function detectExitIntent(callback) {
  let triggered = false;
  document.addEventListener("mouseleave", function(e) {
    if (e.clientY <= 0 && !triggered) { triggered = true; callback(); }
  });
  let lastScrollY = window.scrollY;
  let scrollUpCount = 0;
  window.addEventListener("scroll", function() {
    if (window.scrollY < lastScrollY) {
      scrollUpCount++;
      if (scrollUpCount > 3 && window.scrollY < 100 && !triggered) {
        triggered = true; callback();
      }
    } else { scrollUpCount = 0; }
    lastScrollY = window.scrollY;
  });
}
detectExitIntent(function() { console.log("User is about to leave!"); });
</script>