Re: Error Console links

On 5/19/2010 1:18 AM, Justin Wood (Callek) wrote:
> https://developer.mozilla.org/en/Exception_logging_in_JavaScript
>

also: https://developer.mozilla.org/en/nsIScriptError


> On 5/10/2010 6:11 AM, Robert wrote:
>> I have a question about the display of javascript Errors in the Firefox
>> Error Console.
>>
>> The Error Console will display the error when a javascript object is
>> thrown (and not catched).
>> If this is done with the normal Error object, for example:
>> throw new Error("my message")
>> then it shows the error message and a nice link that you can use to jump
>> to the file and line number
>> where the Error object was created.
>>
>> I would like to know what the exact conditions are for this link to be
>> displayed.
>> I ask this because I tried to extend the Error object in many ways to
>> disinguish between different
>> exceptions, yet still have that useful link in the Error Console.
>>
>> My custom Exception object is extended in such a way that "instanceof
>> Error" returns true. And it contains
>> the fileName and lineNumber properties. Yet I still see no link.
>>
>> I give some javascript to show you one method I used to extend the Error
>> object:
>>
>> ************
>> clone = function (object)
>> {
>> function Dummy(){};
>> Dummy.prototype = object;
>> return new Dummy();
>> }
>>
>> extend = function (superclass, subclass)
>> {
>> subclass.prototype = clone(superclass.prototype);
>> subclass.prototype.constructor = subclass;
>> }
>>
>> Exception = function(error)
>> {
>> for (var p in error)
>> {
>> this[p] = error[p];
>> }
>> }
>> extend(Error, Exception);
>> Exception.prototype.toString = function()
>> {
>> return "Exception: " + this.message + "
>> (filename="+this.fileName+":"+this.lineNumber+")";
>> }
>>
>> throw new Exception(Error("my exception"));
>>
>> ************
>>
>> Kind regards,
>> Robert
>>
>