The most common way those exit-intent popups work is to check for when the users' mouse leaves the viewport e.g. https://stackoverflow.com/questions/923299/how-

The most common way those exit-intent popups work is to check for when the users' mouse leaves the viewport e.g. https://stackoverflow.com/questions/923299/how-can-i-detect-when-the-mouse-leaves-the-window https://stackoverflow.com/questions/923299/how-can-i-detect-...