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Re: Comment on MWABP Recommendation about viewport

From: Francois Daoust <fd@w3.org>
Date: Fri, 17 Dec 2010 09:04:56 +0100
Message-ID: <4D0B19A8.30208@w3.org>
To: 石野幸夫 <ishino@jig.jp>
CC: public-bpwg-comments@w3.org
Hi Yukio,

Thanks for your comment. The Mobile Web Application Best Practices does not reference a specification that defines the viewport meta tag because there is no standard that defines it so far. Apple introduced the meta tag and the link you suggest is the closest thing to a specification for it, indeed.

Please note that the viewport meta tag is now supported by a wide range of devices and browsers, which explains why the statement appears as a best practice. The list includes:
- Android: http://developer.android.com/guide/webapps/targeting.html#Metadata
- Firefox Mobile: https://developer.mozilla.org/en/Mobile/Viewport_meta_tag
- Opera Mobile: http://dev.opera.com/articles/view/opera-mobile-9-7-features-standards/
- the WebOS platform: http://developer.palm.com/index.php?option=com_content&view=article&id=1574#BrowserStandards-MetaViewport
- Blackberry: http://docs.blackberry.com/en/developers/deliverables/6176/HTML_ref_meta_564143_11.jsp
- IE Mobile: http://msdn.microsoft.com/en-us/library/dd938878.aspx#DisplayingWebPagesonInternetExplorerMobile6
- ...


On 12/16/2010 05:01 AM, 石野幸夫 wrote:
> Hi Mobile Web Best Practices Working Group members,
> I read the Recommendation about viewport and think that
> the document should have the URL to refer the specification.
>> 3.5.10 Use Meta Viewport Element To Identify Desired Screen Size
>> ...
>> How to do it
>> A typical viewport setting looks like this:
>>    <meta name="viewport" content="width=device-width, initial-scale=1.0"/>  ,
>> and is inserted into the<head>  element of the HTML document.
>> This setting informs the browser to always render the page at 100%
>> (e.g. no browser based scaling) and is appropriate for pages specifically
>> designed for the target screen-size.
> Because I couldn't find out the specification of viewport from the URLs
> what are in References section.
> Although I found the spec on the Web on Safari, it's only for Safari isn't it?
>    Safari HTML Reference - viewport
>    http://developer.apple.com/library/safari/#documentation/appleapplications/reference/SafariHTMLRef/Articles/MetaTags.html#//apple_ref/html/const/viewport
> I hope that my comment will help being better the Recommendation.
> Thanks,
> Yukio Ishino
Received on Friday, 17 December 2010 08:05:26 UTC

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