Because the browser is stateless, there are two situations when the capture browser is closed:
1. actually close the browser (a. Click the close button B. Right-click the taskbar to close c. press alt + F4 to close)
2. Refresh the browser.
How can we identify and distinguish these two actions?
I. Javascript code processing method: Copy codeThe Code is as follows: function window. onbeforeunload ()
{
// Click the close button in the upper-right corner of the browser or press alt + F4 to close it.
If (event. clientX> document. body. clientWidth & event. clientY <0 | event. altKey)
{
// Alert ("click the close button ");
Document. getElementById ("hiddenForm: hiddenBtn"). click ();
// Window. event. returnValue = "are you sure you want to exit this page? ";
}
// Right-click the task bar and choose Close. S or press alt + F4 to disable
Else if (event. clientY> document. body. clientHeight | event. altKey)
{
// Alert ("right-click to close the taskbar ");
Document. getElementById ("hiddenForm: hiddenBtn"). click ();
// Window. event. returnValue = "are you sure you want to exit this page? ";
}
// Refresh in other cases
Else
{
// Alert ("Refresh page ");
}
}
Where event. clientX cursor X coordinates
Document. body. clientWidth form workspace width
Event. clientY mouse cursor Y coordinate
Event. altKey: whether to press alt
Ii. Event capturing methods: Copy codeThe Code is as follows: <body scroll = "no" onbeforeunload = "return CloseEvent ();" onunload = "UnLoadEvent ()">
</Body>
<Script language = "JavaScript" type = "text/javascript">
Var DispClose = true;
Function CloseEvent ()
{
If (DispClose)
{
Return "do you want to leave the current page? ";
}
}
Function UnLoadEvent ()
{
DispClose = false;
// Process the action before closing the page here
}
</Script>
An onbeforeunload event is triggered before the page is detached. If you select Yes, The unload event is triggered. Otherwise, no operation is performed on the returned page.
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