2009/7/20 Alex McAuley <webmas...@thecarmarketplace.com>:
>
> Yer i dont load it via src="" as it slows the page down dramatically!!! ....
>
> Contrary to popular belief i have tried and tested external scripts and
> external css files and due to browsers paralell downloads with YSlow i can
> save around 7 seconds on loading a very heavy page full of prototype,jQuery
> some UI stuff and a bunch of CSS!...
>
> It does seem that it gets evaluated though you are correct, i went back and
> checked after finding those bits out and watched page load speed before and
> after!.
>
> Ta
>
> Alex
>
>
> ----- Original Message -----
> From: "Richard Quadling" <rquadl...@googlemail.com>
> To: <prototype-scriptaculous@googlegroups.com>
> Sent: Monday, July 20, 2009 12:23 PM
> Subject: [Proto-Scripty] Re: Checking if prototype is loaded
>
>
>>
>> 2009/7/20 Alex McAuley <webmas...@thecarmarketplace.com>:
>>>
>>> Just an FYI incase anyone wondered ....
>>>
>>> It seems (at least in firefox 3x, IE7+, CHrome, Safari (windows)) that
>>> the
>>> browser or "prototype" itself wont load 2 copies of it....
>>>
>>> To Test i included prototype.js in the <head> and included it again in
>>> the
>>> body and there was only one output of javascript!....
>>>
>>> Kudos to the browser vendors or the script devs!!
>>>
>>> ----- Original Message -----
>>> From: "Alex McAuley" <webmas...@thecarmarketplace.com>
>>> To: <prototype-scriptaculous@googlegroups.com>
>>> Sent: Monday, July 20, 2009 11:12 AM
>>> Subject: [Proto-Scripty] Re: Checking if prototype is loaded
>>>
>>>
>>>>
>>>> Sorry my bad.... was "if(window.Prototype) ..."
>>>>
>>>>
>>>> Sorry for silly post !!
>>>>
>>>> Alex
>>>> ----- Original Message -----
>>>> From: "Jeztah" <webmas...@thecarmarketplace.com>
>>>> To: "Prototype & script.aculo.us"
>>>> <prototype-scriptaculous@googlegroups.com>
>>>> Sent: Monday, July 20, 2009 11:07 AM
>>>> Subject: [Proto-Scripty] Checking if prototype is loaded
>>>>
>>>>
>>>>>
>>>>> Morning guys.
>>>>>
>>>>> Does anyone know a way to check if prototype is loaded or not ....
>>>>>
>>>>> I have tried "if(Prototype) { ..." but just throws an undefined error.
>>>>>
>>>>> I know i know i should know if it is loaded or not but my servers use
>>>>> very heavy aggressive caching due to massive user loads and i noticed
>>>>> in my cache there was some javascript thats not even on the page left
>>>>> in a session cache.
>>>>>
>>>>> To cut it short i use server side methods to gzip/minify js files on
>>>>> page load (same with the css).... as they are loaded they go into an
>>>>> array if whats loaded. Then on the page i am able to check the "Cache"
>>>>> of javascript loaded by checking a session array variable. The trouble
>>>>> is .... the session variable is rightly telling me prototype is
>>>>> (included) - but not in the <head> tag so it is not showing up as a
>>>>> loaded script once the page is refreshed!!!....
>>>>>
>>>>> would it be window.Prototype or is there a cleaner method ?
>>>>>
>>>>>
>>>>> Thanks in advance
>>>>>
>>>>> Alex
>>>>>
>>>>> >
>>>>>
>>>>
>>>>
>>>> >
>>>>
>>>
>>>
>>> >
>>>
>>
>> I would be careful of your assumptions.
>>
>> The second copy IS loaded. Hopefully from cache.
>>
>> You will notice that the very first line of javascript in prototye.js is
>> ...
>>
>> var Prototype = {
>>
>> So, this will overwrite any pre-existing variable called Prototype.
>>
>> So, the second copy IS executed. As far as I can tell, all of the code
>> in prototype.js can quite happily run twice or more without a problem.
>>
>> I think the issue would come if you had other code loaded between the
>> 2 prototypes which you expected to be present. Say a plugin to
>> prototype....
>>
>> <script type="text/javascript" src="/js/prototype.js"></script>
>> <script type="text/javascript" src="/js/prototype-plugin.js"></script>
>> <script type="text/javascript" src="/js/prototype.js"></script>
>>
>> If the plugin extends prototype's features in some way, then the
>> second load of prototype will effectively reset Prototype back to the
>> base version.
>>
>>
>>
>>
>>
>>
>> --
>> -----
>> Richard Quadling
>> Zend Certified Engineer : http://zend.com/zce.php?c=ZEND002498&r=213474731
>> "Standing on the shoulders of some very clever giants!"
>> ZOPA : http://uk.zopa.com/member/RQuadling
>>
>> >
>>
>
>
> >
>

How do you load prototype?

-- 
-----
Richard Quadling
Zend Certified Engineer : http://zend.com/zce.php?c=ZEND002498&r=213474731
"Standing on the shoulders of some very clever giants!"
ZOPA : http://uk.zopa.com/member/RQuadling

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