Hi all,

Here is description from YSlow:
/JavaScript scripts block parallel downloads; that is, when a script is 
downloading, the browser will not start any other downloads. To help the 
page load faster, move scripts to the bottom of the page if they are 
deferrable.

/Isn't that the point why to put it on the bottom.

- Marko

david wrote:
> Hi Javier,
>
> Alex answer is good, an I will follow his way.
> But it depend on a few things:
> - internet / intranet: meaning if response time to load JS files could
> be long, you should have as your collegue says an amount of time where
> your application, is not running, but all HTML will be load. A kind of
> "break time".
> - The amount of code executed, if it's very important, you'll still
> have that "break time"
>
> This break time could be disgracefull. but we are talking generally
> about hundreds of millisecondes.
> This is very short time for humans, but of course it make a big
> difference on charts. :))
> I personnally put it on top, my users are not terminator !
>
> --
> david
>
> On 16 sep, 12:11, "Alex McAuley" <webmas...@thecarmarketplace.com>
> wrote:
>   
>> Personaly form my experience putting JS at the top or bottom shaves only a
>> second or so on page rendering/loading....
>>
>> If you application relies heavily on javascript for its enhanced
>> functionality and needs the observers in place to function then i would put
>> it at the top.
>>
>> for example....
>>
>> Load the javascript in the head as normal, then add the event observer for
>> dom/window load/ready to set the observers up...
>>
>> Yahoo's idea is only one out of many ways of doing things and what may work
>> for them with their infrastructure and frameworks may not work or benefit
>> everyone.
>>
>> Alex Mcauleyhttp://www.thevacancymarket.com
>>
>> ----- Original Message -----
>> From: "skaiuoquer" <skaiuoq...@gmail.com>
>> To: "Prototype & script.aculo.us" <prototype-scriptaculous@googlegroups.com>
>> Sent: Tuesday, September 15, 2009 10:42 PM
>> Subject: [Proto-Scripty] YSlow's rule "JavaScript at the bottom" w/Prototype
>>
>>     
>>> Guys, I wonder if you can help me with this;
>>>       
>>> I just had a twenty minute-long discussion with a senior co-worker on
>>> the YSlow rule "put JavaScript at the bottom"--for more information on
>>> it, please check out [
>>> http://developer.yahoo.com/performance/rules.html#js_bottom
>>> ].
>>>       
>>> Now, I want to adhere to this rule as well as eliminate "onevent"
>>> attributes on HTML tags on a given product.
>>>       
>>> My colleague thinks this is going to result in "bugs" when perplexed
>>> users are confronted with a "fully" rendered page and thus attempt to
>>> click on links that have no JS behaviour added yet--since I want all
>>> of the behaviour to be added using the 'observe' method.
>>>       
>>> Is this so? Can you guys please shed some light on this subject on an
>>> application basing its JS on Prototype?
>>>       
>>> Thanks in advance and warm regards,
>>>       
>>> - Javier
>>>       
> >
>   


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