[whatwg] A question about portrait-secondary of screen orientation

Ian Hickson ian at hixie.ch
Fri Jul 12 10:26:19 PDT 2013

On Fri, 8 Feb 2013, Chundong Wang wrote:
> Hello - Got a question of screen orientation on portrait/landscape.
> Let's say we have a device doesn't support portrait-secondary, by 
> spec<http://www.w3.org/TR/screen-orientation/> we should remove it from 
> allow list which is fine. However if web developer specified "portrait" 
> instead of "portrait-primary" for lockOrientation(), which I suppose is 
> a common case, we'll have to expand it to "portrait-primary, 
> portrait-secondary" according spec. In this case the lockOrientation() 
> would fail because orientations isn't a supported orientation set. I 
> don't think it'll satisfy the original purpose of "portrait".
> IMHO, we should explain this more detailed.  We could either,
> 1.  Only expand "portrait"(or "landscape") into allowed orientations, 
> or;
> 2.  Filter out disallowed orientations from orientation sequence and 
> lock the screen with that list.

I believe feedback on this specification is intended to be sent to 
public-webapps at w3.org.

Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'

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