Hi group,
Thought for completion I thought I'd show the finalised valid code.
I didn't like breaking validation by using either:
<head>
...
<noscript>
<link rel="stylesheet" href="noscript.css"
type="text/css" media="all" />
</noscript>
...
</head>
Or:
<body>
...
<noscript>
<link rel="stylesheet" href="noscript.css"
type="text/css" media="all" />
</noscript>
...
</body>
In the end I opted for adding the CSS to the standard file.
Accepting the extra 4052 B file-size hit which everyone now gets.
The method employed required preceding each "No JS" specific selector with
".noJS".
Then:
<head>
...
<style type="text/css">
All styles severed here.
</style>
...
</head>
<body class="noJS">
<script
type="text/javascript">/*<![CDATA[*/document.body.className="";/*]]>*/</script>
...
</body>
Thanks
Mike Foskett
http://websemantics.co.uk/
On Thu, Jul 14, 2011 at 12:36 PM, Foskett, Mike
<mike.fosk...@uk.tesco.com<mailto:mike.fosk...@uk.tesco.com>> wrote:
Hi all,
Just finished a major update for Tesco's homepage.
http://www.tesco.com/
Tesco's are the UKs largest retailer and this page gets approximately 1 million
hits a day.
The page has been speed tweaked as much as possible given IT / server
restraints.
Unfortunately the page now fails W3C formal grammar validation.
Because the page as designed was a massive 1.4MB (previously 260 Kb - 330 Kb),
JavaScript was used to fetch image upon demand rather than on-load or post-load.
This greatly reduced the impact on the servers (critical) and improved the
initial page load speed.
Obviously a no JavaScript version was also required.
The image references cannot be in the standard CSS as IE loaded all the images,
used or not:
.noJS .imgRef {background:url(...)}
Will not work.
All the image references were placed into a separate CSS noJS.css and the link
in a <noscript> and this is where the validation breaks.
Apparently <noscript> is illegal in the <head>, and a <noscript> containing a
<link> is illegal in the body.
<noscript>
<link rel="stylesheet"
href="/homepages/default/noJS.compressed.css" type="text/css" media="all" />
</noscript>
I went for placing it in the body so the noscript is legal but the link
reference is not.
I can see no alternative, and wondered if any of the list members had a more
valid solution?
Regards,
Mike Foskett
http://webSemantics.co.uk/<http://websemantics.co.uk/>
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