Closed
Bug 68913
Opened 24 years ago
Closed 24 years ago
window.opener method returns object for all pages
Categories
(Core :: DOM: Core & HTML, defect)
Tracking
()
VERIFIED
INVALID
People
(Reporter: asreddy_74, Assigned: jst)
References
()
Details
Attachments
(1 file)
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356 bytes,
text/html
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Details |
Check example below
<HTML>
<HEAD>
<TITLE>Test opener</TITLE>
<SCRIPT LANGUAGE="JavaScript">
function test() {
alert(typeof( window.opener ));
}
alert("typeof( window.opener ) " + typeof( window.opener ));
</SCRIPT>
</HEAD>
<BODY>
<INPUT TYPE="button" VALUE="Get window opener again" onClick="test()">
</FORM>
</BODY>
</HTML>
Tested on Mozilla - Mozilla/5.0 (Windows; U; WinNT4.0; en-US; m18)
Gecko/20010131
Expected behaviour as in IE i.e. notdefined when not existing
Regards
Srinivas
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Comment 1•24 years ago
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Comment 2•24 years ago
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I see object returned by typeof(window.opener) on build 2001021505 WinNT. I tend to think this is not a bug. Netscape 4.x also returns object for typeof(window.opener). However, it does this because typeof(null) returns object. Mozilla has the same behavior: it returns null for window.opener and object for typeof. JavaScript: The Definitive Guide by David Flanagan (O'Reilly) on page 81 says "The typeof operator evaluates to 'object' for objects, arrays, and (surprisingly) null." It would seem checking for window.opener == null would be better than checking for typeof(window.opener) == undefined and would work with Netscape 4.x as well. Based on this and common behavior with Netscape 4.x, I'm resolving this as Invalid. Change it back if you think this is a real bug.
Status: UNCONFIRMED → RESOLVED
Closed: 24 years ago
Resolution: --- → INVALID
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Comment 3•24 years ago
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Updated URL to have a similar testcase that shows both window.opener and typeof(window.opener).
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Assignee | |
Comment 4•24 years ago
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Checking for window.opener == undefined or typeof(window.opener) == undefined is definitely not the right thing to do, window.opener is always defined (and it's always an object), but it could very well be null (which, as tpowell stated above). Verified.
Status: RESOLVED → VERIFIED
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Updated•5 years ago
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Component: DOM → DOM: Core & HTML
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Description
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