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Message-ID: <2341534.6UFASCjf2k@PointedEars.de>
From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Reply-To: Thomas 'PointedEars' Lahn <cljs@PointedEars.de>
Organization: PointedEars Software (PES)
Date: Tue, 13 Mar 2012 23:10:50 +0100
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Subject: Re: on*= Clauses: When to return
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David Mark wrote:

> Gene Wirchenko wrote:
>> David Mark wrote:
>> > Gene Wirchenko wrote:
>> >> Dear JavaScripters:
>> >> 
>> >> In my working with on* clauses, one confusion I had was when to
>> >> return and when not to.  For example, with onblur, the return is
>> >> needed, as in:
>> >> <input name=Sample onblur="return SampleTest();">
>>
>> >What makes you think that's needed? And for what?
>>
>> I want to know when it is required, and when it is not.  I have
>> seen it used without differentiation as to when it is required.
> 
> Returning false prevents the default behavior for *some* events. When
> and why would you want to prevent a blur? ISTM that you can't any more
> than you can prevent the focus behavior. Those events are fired after
> the behavior has occurred.

For some event types, returning `true' does the same thing as returning 
`false' for others.  I had started detailing this at 
<https://developer.mozilla.org/en/DOM_Client_Object_Cross-
Reference/DOM_Events>.  Any good updates are welcome.


PointedEars
-- 
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