Closed
Bug 360267
Opened 18 years ago
Closed 18 years ago
Javascript: Cannot add members (i.e. functions) to Function.prototype
Categories
(Firefox :: General, defect)
Tracking
()
RESOLVED
DUPLICATE
of bug 355161
People
(Reporter: raoul, Unassigned)
Details
Attachments
(3 files)
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; de; rv:1.8.1) Gecko/20061010 Firefox/2.0
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; de; rv:1.8.1) Gecko/20061010 Firefox/2.0
It is not stable to enhance Function.prototype in a new opened window within a javascript file.
i.e. main.html opens new.html and new.html includes inc.js and in inc.js you have Function.prototype.bind=function ..
A call to function(){}.bind() will fail in 50% on a windows-system (I checked it out on 3 systems). It seems to be OK on mac and linux systems.
Reproducible: Sometimes
Steps to Reproduce:
1. create 3 files: main.html, new.html and inc.js (see below)
2. open main.html
3. if there are no errors click the link in main.html and try again
Actual Results:
ERROR: test
OK: test2
Expected Results:
OK: test
OK: test2
#####################################################
main.html
#####################################################
<html>
<head>
<script>
function doit() {
window.open('new.html','width=100,height=100');
}
</script>
</head>
<body onload="doit();">
<a href="#" onclick="javascript:doit();return false;">
Click here to open the window
</a>
</body>
</html>
#####################################################
new.html:
#####################################################
<html>
<head>
<script type="text/javascript">
/* save a handle for test2() */
var FUNCTION_PROTOTYPE = Function.prototype;
var str = "";
</script>
<script type="text/javascript" src="inc.js"></script>
<script type="text/javascript">
var func = function() {};
try {
/* this causes an error in 50% off all tests */
func.test();
str += "OK: test\n";
} catch (e) {
str += "ERROR: test\n";
}
try {
/* this seems to be fine */
func.test2();
str += "OK: test2\n";
} catch (e) {
str += "ERROR: test2\n";
}
alert(str);
/* close the window so it's easier to test */
window.close();
</script>
</head>
<body>...</body>
</html>
#####################################################
inc.js
#####################################################
/* this can cause a problem */
Function.prototype.test=function(){ /* ... */ };
/* a saved reference to Function.prototype seems to be ok */
if (FUNCTION_PROTOTYPE)
FUNCTION_PROTOTYPE.test2 = Function.prototype.test;
#####################################################
Comment on attachment 245219 [details] open this file ><HTML><HEAD> > > <SCRIPT> > function doit() { > window.open('http://bugzilla.mozilla.org/attachment.cgi?id=245217','width=100,height=100'); > } > </SCRIPT></HEAD><BODY onload="doit();"> > <A onclick="javascript:doit();return false;" href="#"> > Click here to open the window > </A> > ></BODY></HTML>
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Comment 5•18 years ago
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Please try either a nightly Firefox 2.0.0.1 <http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-mozilla1.8/> build or a trunk build <http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-trunk/> to verify the fix. *** This bug has been marked as a duplicate of 355161 ***
Status: UNCONFIRMED → RESOLVED
Closed: 18 years ago
Resolution: --- → DUPLICATE
(In reply to comment #5) > Please try either a nightly Firefox 2.0.0.1 It seems to be fixed. I cannot reproduce the malicious behaviour with an actual nightly build.
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Description
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