CSS Media queries must not lock display orientation

The screen orientation (such as portrait or landscape) of mobile applications should not be restricted to a single mode. Users should be able to shift the orientation of their device between portrait and landscape without losing readability. Additionally, upon opening a page, it should appear in the current orientation of the user.

Users of assistive technologies may not have access to orientation features on their devices or assistive technologies.

What this Accessibility Rule Checks

Unless a specific display orientation is important, content does not confine its view and functionality to a single display orientation, such as portrait or landscape.

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Deque Reference

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