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Re: Ideas for MWABP? Slides from Peter-Paul Koch on the use of Javascript in Web pages

From: Adam Connors <adamconnors@google.com>
Date: Wed, 29 Oct 2008 14:09:49 +0000
Message-ID: <393b77970810290709wf865cb8q953167199e4909dc@mail.gmail.com>
To: "Francois Daoust" <fd@w3.org>
Cc: "Mobile Web Best Practices Working Group WG" <public-bpwg@w3.org>
Thanks Francois... The recommendations you give here definitely tally
similar we've seen elsewhere and that are already in the doc. I'll make sure
I fold all these into the latency section (name tbd) in the next revision
and will take a look at the others to see if there is anything suitable

On Wed, Oct 29, 2008 at 1:50 PM, Francois Daoust <fd@w3.org> wrote:

> Hi,
> I stumbled upon the following blog post today:
>  http://www.quirksmode.org/blog/archives/2008/10/slides_from_ace.html
> ... and found that some of the slides match our discussions on Mobile Web
> Application Best Practices, so I thought I would just share it:
> http://www.quirksmode.org/presentations/fundamentosweb08/fundamentosweb.pdf
> In particular:
> - how to use onfocus and onblur events to replace onmouseover and
> onmouseout (slides 88-110).
>  That's probably too technical for MWABP. But then we already have fairly
> detailed parts.
> - how to do drag-and-drop using the keyboard (slides 135-148).
>  Same thing, probably too detailed for MWABP.
> - rules to improve performance (slides 154-193).
>  That's the part that best matches what we have in the spec.
>  The list is extracted from a book by Steve Souders entitled "High
> performance Web Sites" (this explains the apparently irrationale numbering
> below):
>  1) Make fewer HTTP requests
>  In MWABP, matches "Minimize External Resources"
>  4) Gzip components (slide 158):
>  I don't think he had the mobile context in mind here when he recommands to
> compress everything
>  In MWABP, matches "Use Transfer Compression for Content"
>  5) Put stylesheets at the top [and use <link> tags instead of @import]
> (slide 159-160)
>  The browser needs all the style sheets before it can start rendering the
> page.
>  6) Put scripts at the bottom
>  It seems that, when scripts are loaded, all the other downloads are
> blocked because the script might contain a document.write() directive. I am
> not sure what "blocked" really means.
>  8) Make JavaScript and CSS external
>  For caching purposes.
>  In MWABP, matches the CACHING best practice in the Mobile Web Best
> Practices 1.0 Recommendation
> He also mentions the idea to combine different icons into one image and use
> CSS Sprites (slides 170-178)
> In MWABP, matches "Sprite Static Images Into a Single Request"
> Francois.
Received on Wednesday, 29 October 2008 14:10:30 UTC

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