When we write JS code, it is often necessary to judge whether the web page is turned off. If it is turned off, it will execute a certain code. This can perform a JS code with HTML's onbeforeunload event, but if the web is only refreshed, Also triggers the onbeforeunload event, the following JS code can determine if it is closed
/ / Judgment is closed or refreshed
IF (Event.Clientx> Document.Body.Clientwidth && event.clienty <0 || Event.altKey)
{
Alert ("You turn off the browser");
}
This code is to determine whether the mouse is hitting the button, or pressing Alt F4 to shut down the web page, if so, if so, the system is to close the web page, otherwise the system is refreshing web page.
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