[whatwg] Fullscreen feedback

[Adam Barth]

On Fri, Aug 20, 2010 at 7:25 PM, Robert O'Callahan <robert at ocallahan.org> wrote:
> On Sat, Aug 21, 2010 at 8:24 AM, Ian Hickson <ian at hixie.ch> wrote:
>> One comment: Rather than adding an "allowfullscreen" attribute on
>> <iframe>, I would suggest just assuing that sandboxed content (i.e.
>> content of iframes with the sandbox="" attribute) can't go fullscreen. I
>> can provide a sandbox flag for this state. If we think there are use cases
>> for allowing sandboxed iframes to go fullscreen, then I can also add a
>> keyword that turns off the flag when present (like "allow-scripts" does
>> for scripts). (I'm assuming there are no cases for disabling fullscreen
>> for unsandboxed iframes; are there?)
>
> What about legacy content that doesn't use "sandbox"? It might expect
> cross-origin IFRAMEs to not be able to take over its window, but if the
> IFRAME content goes fullscreen, it effectively can.
>
> I think allowing subframes to go fullscreen should always be opt-in.

How is going fullscreen different from opening a popup window?

Adam