[whatwg/fullscreen] DRAFT PROPOSAL: Pre-apply orientation lock via FullscreenOptions (PR #207)

Seeking feedback on this draft proposal from implementers. 

The potential advantages with this proposal are numerous:

 * Potentially smoother visual transition when switching to fullscreen. 
 * Releasing the orientation is explicitly tied to exiting fullscreen (per #202)
 * Easier to use than Screen Orientation Lock API, while also working together with it (via events, and also allowing orientation changes after going fullscreen). 

Addresses #186 

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You can view, comment on, or merge this pull request online at:

  https://github.com/whatwg/fullscreen/pull/207


-- Commit Summary --

  * Pre-apply orientation lock via FullscreenOptions

-- File Changes --

    M fullscreen.bs (9)

-- Patch Links --

https://github.com/whatwg/fullscreen/pull/207.patch

https://github.com/whatwg/fullscreen/pull/207.diff


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