Detailed explanation of onbeforeunload event

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The onbeforeunload event refers to an event that occurs before the window is closed. It is usually used to prompt the user to leave the page with a warning message. This event is called through the window object. Before the window is closed, this event can be used to terminate the page jump or display a warning message. . This page also provides content related to the onbeforeunload event for everyone to download and experience for free.