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Error handling in javascript
- Thread starter Belinar
- Start date
you can try double-clicking on your error message in the bottom left of your IE browser, or you can download FireFox and use it's built-in javascript console.
you can also download javascript debuggers for free which will perform the same as FireFox's debugger.
*cLFlaVA
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[URL unfurl="true"]http://www.coryarthus.com/[/url]
you can also download javascript debuggers for free which will perform the same as FireFox's debugger.
*cLFlaVA
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[URL unfurl="true"]http://www.coryarthus.com/[/url]
I suggest you get Firefox and do a custom install. Choose the Developer Tools as well as the normal browser install. This installs the Web Developer Toolbar and gives single-click access to all manner of debugging goodies (including a decent javascript console).
Cheers,
Jeff
[tt]Jeff's Page @ Code Couch
[/tt]
What is Javascript? FAQ216-6094
Cheers,
Jeff
[tt]Jeff's Page @ Code Couch
[/tt]
What is Javascript? FAQ216-6094
- Thread starter
- #4
where are you using it?
*cLFlaVA
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[URL unfurl="true"]http://www.coryarthus.com/[/url]
- Thread starter
- #6
- Thread starter
- #7
That really doesn't make much sense. How is this JavaScript being called if it's not from a browser?
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- Thread starter
- #9
trollacious
Programmer
WSH uses Javascript, too, as JScript, and I use it in ASP all the time (my ASP language of choice).
Basically, the program that generates the error has to have the debugging tools built in to provide that kind of information. The best you can do is to write code to display values at different points, and narrow down where it's breaking down from that technique.
Lee
Basically, the program that generates the error has to have the debugging tools built in to provide that kind of information. The best you can do is to write code to display values at different points, and narrow down where it's breaking down from that technique.
Lee
- Thread starter
- #11
BillyRayPreachersSon
Programmer
Some browsers do give you the line number in the error object passed to the "catch" call. For example, Firefox 1.5 gives me the line number for the error here:
Maybe your JavaScript engine does too?
Hope this helps,
Dan
[tt]Dan's Page [blue]@[/blue] Code Couch
[/tt]
Code:
<html>
<head>
<script type="text/javascript">
<!--
try {
// Your code here.
// Any errors will be trapped. For example:
nonExistentFuntionCall(); // <-- this should error
}
catch (errorDetail) {
var s = '';
for (props in errorDetail) s += 'errorDetail.' + props + ': ' + errorDetail[props] + '\n';
alert(s);
//alert('An error occurred. The problem was:\n\n' + errorDetail);
}
//-->
</script>
</head>
<body>A page</body>
</html>Maybe your JavaScript engine does too?
Hope this helps,
Dan
[tt]Dan's Page [blue]@[/blue] Code Couch
[/tt]
trollacious
Programmer
I believe that alert() is a method of the browser's window object, so wouldn't be available unless it was specifically implemented by another application.
Lee
Lee
BillyRayPreachersSon
Programmer
I was more pointing out the technique of obtaining the information than displaying it ;-)
[tt]Dan's Page [blue]@[/blue] Code Couch
[/tt]
[tt]Dan's Page [blue]@[/blue] Code Couch
[/tt]
BillyRayPreachersSon
Programmer
Belinar,
Did the "for (props in errorDetail)" code work for you?
Dan
[tt]Dan's Page [blue]@[/blue] Code Couch
[/tt]
Did the "for (props in errorDetail)" code work for you?
Dan
[tt]Dan's Page [blue]@[/blue] Code Couch
[/tt]
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