Javascript window.print() in chrome, closing new window or tab instead of cancelling print leaves javascript blocked in parent window

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It looks like the problem had been resolved with the latest Chrome update… I’m running the Chrome Version 36.0.1964.4 dev-m.

I was limited too warning the user from closing print preview window by doing the following:

if(navigator.userAgent.toLowerCase().indexOf('chrome') > -1){   // Chrome Browser Detected?
    window.PPClose = false;                                     // Clear Close Flag
    window.onbeforeunload = function(){                         // Before Window Close Event
        if(window.PPClose === false){                           // Close not OK?
            return 'Leaving this page will block the parent window!\nPlease select "Stay on this Page option" and use the\nCancel button instead to close the Print Preview Window.\n';
        }
    }                   
    window.print();                                             // Print preview
    window.PPClose = true;                                      // Set Close Flag to OK.
}

Now the warning is no longer coming up after the Chrome update.

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