[webkit-dev] Default viewport value on WAP DTDs

Kenneth Rohde Christiansen kenneth.christiansen at gmail.com
Fri May 4 09:18:08 PDT 2012

I think this relates more to the CSS Device Adaptation spec. Desktop
browser so far ignores the viewport meta tag, where as mobile browsers
do not.

The thing is that a default viewport information is inserted when the
viewport meta tag is missing, which most current mobile browsers then
layouts using a width of around 980 (can differ from browser to
browser). This is done as it handles desktop pages quite well.

Most XHTML-MP pages on the other hand assume that they are being laid
out using the width of the mobile device, which is often far lower
then 980 (especially as high resolution mobile devices adjust the


On Fri, May 4, 2012 at 6:01 PM, Alexey Proskuryakov <ap at webkit.org> wrote:
> 03.05.2012, в 13:46, Hugo Parente Lima написал(а):
>> <!DOCTYPE html PUBLIC "-//WAPFORUM//DTD XHTML Mobile 1.0//EN"
>> "http://www.wapforum.org/DTD/xhtml-mobile10.dtd">
>> The proposed patch changes the magic value of 980 pixels to "device-width"
>> when this doctype is found causing the website to render nicely if the device
>> screen is small, i.e. don't show the website in a 980 pixels canvas zoomed out
>> to fit the <980 pixels screen.
>> Some webkit browsers already use this hack, like the N9 browser and if I
>> understood correctly by the Zalan comments on the bug, the iOS Safari too.
> I think that introduction of new doctype based modes should go through HTML5 first - if WebKit needs this, then other browsers need it, too.
> Also, it's not clear what the distinction between mobile and non-mobile is. Is Safari on an 11" MacBook Air a mobile browser?
> - WBR, Alexey Proskuryakov
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Kenneth Rohde Christiansen
Senior Engineer
Nokia Mobile Phones, Browser / WebKit team
Phone  +45 4093 0598 / E-mail kenneth at webkit.org

http://codeposts.blogspot.com ﹆﹆﹆

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