Closed
Bug 262981
Opened 20 years ago
Closed 20 years ago
typeof on const domConfig property triggers uncaught exception
Categories
(Core :: DOM: Core & HTML, defect)
Tracking
()
RESOLVED
DUPLICATE
of bug 226193
People
(Reporter: sandraros, Unassigned)
Details
Attachments
(1 file, 1 obsolete file)
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269 bytes,
text/html
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Details |
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.3) Gecko/20040910
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.3) Gecko/20040910
The following HTML source triggers a systematic error:
<html>
<head>
<title>Bug typeof</title>
<script language="javascript">
<!--
function myDocumentClick( event ) {
alert( typeof( event.currentTarget.domConfig ) ) ;
}
document.onclick = myDocumentClick;
//-->
</script>
</head>
<body>
<br>
</body>
</html>
after the user clicks mouse button anywhere, a popup should be displayed with
the type of the event.currentTarget.domConfig property (javascript debugger
tells it is of type "{const XPComponent}" ), but the following error occurs and
the popup is not displayed:
Error: uncaught exception: [Exception... "Component returned failure code:
0x80004001 (NS_ERROR_NOT_IMPLEMENTED) [nsIDOM3Document.domConfig]" nsresult:
"0x80004001 (NS_ERROR_NOT_IMPLEMENTED)" location: "JS frame ::
file:///C:/path/bug_typeof.html :: myDocumentClick :: line 8" data: no]
The context is : I have written a function to display all properties (at any
depth) of any variable, I use "typeof" to know if the variable is an object or
not. In the first case, I explore its properties. Otherwise, the property value
is displayed.
The core JavaScript 1.5 reference manual does not speak about all variable types
(only string, number, function, object, undefined, boolean), thus Mozilla should
decide what to do.
Expected result :
I hope the solution would be to return a value like "const class" or something
like this (I don't know what is the type of domConfig), instead of an "uncaught
exception".
Reproducible: Always
Steps to Reproduce:
1.Create HTML as indicated
2.Open the HTML page, and click somewhere
Actual Results:
Error: uncaught exception: [Exception... "Component returned failure code:
0x80004001 (NS_ERROR_NOT_IMPLEMENTED) [nsIDOM3Document.domConfig]" nsresult:
"0x80004001 (NS_ERROR_NOT_IMPLEMENTED)" location: "JS frame ::
file:///C:/path/bug_typeof.html :: myDocumentClick :: line 8" data: no]
Expected Results:
typeof operator should have returned a string containing the type of the
property (whatever it is), instead of an uncaught exception.
Workaround : use try and catch to catch the typeof error.
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Comment 1•20 years ago
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could you attach that testcase using https://bugzilla.mozilla.org/attachment.cgi?bugid=262981&action=enter ? thanks!
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Reporter | |
Comment 2•20 years ago
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Reporter | |
Comment 3•20 years ago
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Comment on attachment 161165 [details]
html to reproduce error
<html>
<head>
<title>Bug typeof</title>
<script language="javascript">
<!--
function myDocumentClick( event ) {
alert( typeof( event.currentTarget.domConfig ) ) ;
}
document.onclick = myDocumentClick;
//-->
</script>
</head>
<body>
<br>
</body>
</html>|
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Reporter | |
Updated•20 years ago
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Attachment #161165 -
Attachment is obsolete: true
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Reporter | |
Comment 4•20 years ago
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Updated•20 years ago
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Assignee: general → general
Component: JavaScript Engine → DOM
QA Contact: pschwartau → general
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Comment 5•20 years ago
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*** This bug has been marked as a duplicate of 226193 ***
Status: UNCONFIRMED → RESOLVED
Closed: 20 years ago
Resolution: --- → DUPLICATE
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Updated•5 years ago
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Component: DOM → DOM: Core & HTML
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Description
•