A frame page, how to determine whether window.parent.opener is closed? ?

jazzwhale

How to determine whether window.parent.opener is closed. Window.parent.opener is closed. When taken out with js, window.parent.opener is not equal to null.

ywzqcom

if (window.parent.opener) {
     Did not close
} else {
     It has been closed
}

ywzqcom

if (window.parent.opener) {
    Did not close
} else {
    It has been closed
}

sunray

Should it be if (window.parent.opener.close ())? Never used, haha
Or is it window.parent.opener = "undefine"? It feels unreasonable

newplayer

window.parent.opener.closed? "Closed": "Not closed"

7660367

var 7660367 = window.parent.opener;

if (typeof (7660367)! = "undefined"&&! 7660367.closed)
{
    ; //
}

jazzwhale

function shutwin()
{
     var wp = window.parent.opener;
        if(wp!=null&&typeof(wp) != "undefined"&&!wp.closed)
        {
            if (wp.document.forms[0].txtRefreshParent != null)
            {
                wp.document.forms[0].txtRefreshParent.value="Refresh";
            }
            else
            {
               if(wp.document.forms[0].ctl00_MainPlaceHolder_txtRefreshParent!=null)
               {
                   wp.document.forms[0].ctl00_MainPlaceHolder_txtRefreshParent.value="Refresh";
               }
            }
            wp.document.forms[0].submit();
        }
    window.parent.close();
}
In fact, wp is closed, but why is wp.closed equal to true, and typeof(wp)="object", why? ? ?

ywzqcom

In fact, wp has been closed, but why is wp.closed equal to true, and typeof(wp)="object", why? ? ?
It seems that I have already practiced Hug, and the above results are understandable. I just throw the bricks indiscriminately and the master will continue.
wp = window.parent.opener;
WP is a reference to a window. Generally, if the window is closed, the window itself has been destroyed, and in principle the corresponding object does not exist. But this is only in the case of a single page.
And here the child page of wp still exists, so the window object of the child page still exists, and this window object also saves the reference to wp (ie window.parent.opener), although in the environment object of wp, it has already It is undefined, but window.parent.opener still exists in the child page. It should be a null object (maybe not null), so wp.closed is true.
The explanation is a bit far-fetched.

jazzwhale

The problem has been resolved, the solution is as follows:
function shutwin()
{
    try
    {
         var wp = window.parent.opener;
            if(wp!=null)
            {
                window.parent.close();
                if (wp.document.forms[0].txtRefreshParent != null)
                {
                    wp.document.forms[0].txtRefreshParent.value="Refresh";
                }
                else
                {
                   if(wp.document.forms[0].ctl00_MainPlaceHolder_txtRefreshParent!=null)
                   {
                       wp.document.forms[0].ctl00_MainPlaceHolder_txtRefreshParent.value="Refresh";
                   }
                }
                   wp.document.forms[0].submit();
            }
            
    }
    catch (exc)
        {
            if (exc.number == -2146828218)//Exception: "No permission"
            {
                return;
            }
            else
            {
                throw exc;
            }
        }
}

jazzwhale

I looked at the exception in detail, and finally found this solution, which has been successfully solved with this solution.