How can I detect a user about the exit the page? [closed]
问题 I would like to detect when a user is about to exit the page, before they click the back button , and do something - for example display a popup. I do not want to prevent the user from leaving the page, but only to grab their attention again. This is already done by Optin Monster, but I want to implement it myself. Where to start? Edit: beforeunload is fired after the user clicked the back or x button. I would like to catch his exit intent , for example when the mouse is moving towards the