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From Reinhard Poetz <reinh...@apache.org>
Subject Re: Client side validation
Date Tue, 23 Nov 2004 09:27:33 GMT
Sylvain Wallez wrote:
> Reinhard Poetz wrote:

>>
>> yep, that's the way to go! If widgets produced Javascript themselves, 
>> we would mix concerns because not all clients support Javascript or 
>> you need different Javascript "dialects" for different clients. 
>> Following Sylvain's proposal it's the stylesheet's job to create 
>> working valdiation programms.
>>
>> We should also think of a way how and where we can add custom 
>> client-side validators. If we add this to the form defintion we would 
>> need some kind of abstract language, or at least Javascript with an 
>> abstract object model:
>>
>> <ft:client-side-validation>
>>   if($widgetXY.value$ <= $widgetZZ.value$ {
>>     return "i18:value-to-high";
>>   }
>>   return true;
>> </ft:client-side-validation>
>>
>> This could be transformed into something valid for the client by 
>> replacing the $...$-tokens through valid pointers to the client's 
>> object model.
> 
> 
> 
> Or simply an abstract getWidgetValue(name) function that would have 
> different implementations server-side and client-side? That way, we 
> don't need macro expansion and we can use a single JS snippet for both 
> client and server-side validation.
> 
> Of course, not every JS validator can run client-side, and that needs to 
> be distinguished with a particular attribute:

Should work either. Maybe the guys with the usecases can tell us more and then 
we talk about the abstraction level.

-- 
Reinhard

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