Subj : Re: Supressing errors?
To   : netscape.public.mozilla.jseng
From : Brian Genisio <BrianGenisio@yahoo.com>
Date : Mon Feb 02 2004 07:30 am

Brendan Eich wrote:
> Brian Genisio wrote:
> 
>>
>>> Why do you want to suppress errors?  Users who make mistakes, obvious 
>>> or subtle, will be left scratching their heads.  With 
>>> try/catch/finally exception handling in JS and ECMA for many years 
>>> now, it seems to me much better to give the user some signal that 
>>> something is amiss.
>>>
>>> /be
>>
>>
>>
>> Only because I am writing something that will act as closely like IE 
>> as possible...
> 
> 
> 
> Really?  Which version(s) of IE?  Can you show a short HTML testcase?
> 
> /be

Sure :)  IE v6.0 XP sp2

///////////////////////////////////////////////////////
var myText = document.createTextNode("THIS IS A TEST");
alert(myText.substringData(window, 4));
///////////////////////////////////////////////////////

The DOMTextData method of substringData takes two integers.  If I send 
in the object of DOMWindow, it defaults to the integer of 0.  The 
example given will print "THIS".

Of course, when I implement the interface for this method, and do a 
JS_ValueToInt32, it fails.  I can use the default of 0 in this case. 
When that the conversion fails, I want to supress the error, because IE 
does not show an error either.

Like I mentioned earlier, I can do other types of checks, and I already 
override the error handler, so I have solutions for this, but I guess I 
was wondering if there was an API way to surpress an error type... Or, 
it is possible that I am doing something wrong still :)

Thanks,
Brian

.