If you put the javascripts at the bottom you may be breaking the site
usabillity, imagine you have a nice animation in your flash message,
just like the ones wordpress uses (I did one for the Admin Generator
Flash messages). And after the page renders, you start loading the JS
that are required for the animations, I use mootools, an aprox of 60k
with all features, but if you load prototype + script.acolo.us (or
whatever it spelled) could be ~ aprox 150 k or more, so your flash
message will animate (flash, fade or wipe in) after what 2,3,4 or 5
seconds after you saw the page? This breaks up the usabillity you
managed to build with JS, even if you use the onDomReady function you
will have to wait for all the library to load up. I rather prefer to
wait while the page loads the JS and start using it right away, than
see the page but can't fully use it cause it doesn't works cause no JS
had been loaded.
On Mar 25, 2:49 pm, "Alistair Stead" <[EMAIL PROTECTED]>
wrote:
> The simplest way to change were the JavaScript includes are added is to
> create your own version of sfCommonFilterthe content of which would be as
> follows this will allow you to continue to use the view.yml to control the
> css / javascript files but they will be placed in a more optimized location.
>
> I did submit this as a proposed upgrade some months ago but it was never
> implimented...
>
> // execute next filter
>
> $filterChain->execute();
>
> // execute this filter only once
>
> $response = $this->context->getResponse();
>
> sfLoader::loadHelpers(array('Tag', 'Asset'));
>
> // include stylesheets
>
> $content = $response->getContent();
>
> if (false !== ($headPos = strpos($content, '</head>')))
>
> {
>
> $cssHtml = '';
>
> if (!$response->getParameter('stylesheets_included', false,
> 'symfony/view/asset'))
>
> {
>
> $cssHtml = get_stylesheets($response);
>
> }
>
> // Place the CSS tags before the closing </head> tag
>
> if ($cssHtml)
>
> {
>
> $response->setContent(substr($content, 0, $headPos).$cssHtml.substr(
> $content, $headPos));
>
> }
>
> }
>
> // include javascripts
>
> $content = $response->getContent();
>
> if (false !== ($bodyPos = strpos($content, '</body>')))
>
> {
>
> $jsHtml = '';
>
> if (!$response->getParameter('javascripts_included', false,
> 'symfony/view/asset'))
>
> {
>
> $jsHtml = get_javascripts($response);
>
> }
>
> // Place the JS tags before the closing </body> tag
>
> if ($jsHtml)
>
> {
>
> $response->setContent(substr($content, 0, $bodyPos).$jsHtml.substr(
> $content, $bodyPos));
>
> }
>
> }
>
> $response->setParameter('javascripts_included', false,
> 'symfony/view/asset');
>
> $response->setParameter('stylesheets_included', false,
> 'symfony/view/asset');
>
> Regards
>
> Alistair
>
> On 25/03/2008, Kris Wallsmith <[EMAIL PROTECTED]> wrote:
>
>
>
> > I just performed this optimization on one of my sites. It's as simple
> > as adding a call to the helper function include_javascripts() at the
> > bottom of your layout file(s). The common filter will know you've
> > already placed your Javascript includes and will only add stylesheets
> > to the <head> section.
>
> > Kris
>
> > On Mar 25, 9:23 am, Marijn <[EMAIL PROTECTED]> wrote:
> > > So I could just add some PHP code in a partial that would be included
> > > on the bottom of every template. The parial would first call
> > > get_javascripts and then delete all javascripts from the sfResponse
> > > object..?
>
> > > Thanks for your quick reply.
>
> > > Marijn
>
> > > On Mar 25, 4:56 pm, Robert Speer <[EMAIL PROTECTED]> wrote:> try
> > get_javascripts ()
>
> > > > the api is easiest to search here:http://www.gotapi.com/symfony
>
> > > > On Mar 25, 10:18 am, Marijn <[EMAIL PROTECTED]> wrote:
>
> > > > > Hi everybody,
>
> > > > > I think this is question belongs in the developer list, if not
> > please
> > > > > be kind enough to tell me ;-)
>
> > > > > Currently Symfony adds javascripts in the head tag of the page but I
> > > > > prefer to put them on the bottom of the page for faster rendering
> > > > > content on the page. For more information about that you can check
> > out
> > > > > this link from Yahoo on front-end
> > optimizationhttp://developer.yahoo.com/performance/rules.html#js_bottom(pretty
> > > > > useful I'd say).
>
> > > > > Is this something that can be considered as an option within symfony
> > > > > or do I need to hack my way through this. If so where to start..? A
> > > > > quick peek at the source didn't result in to much insight on the
> > > > > addJavascript function.
>
> > > > > Thanks,
>
> > > > > Marijn
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