ScreenOrientation

The ScreenOrientation interface of the Screen Orientation API provides information about the current orientation of the document.

A ScreenOrientation instance object can be retrieved using the window.screen.orientation property.

ScreenOrientation.typeRead only

Returns the document's current orientation type, one of "portrait-primary", "portrait-secondary", "landscape-primary", or "landscape-secondary".

ScreenOrientation.angleRead only

Returns the document's current orientation angle.

ScreenOrientation.onchange

The EventHandler called whenever the screen changes orientation.

ScreenOrientation.lock()

Locks the orientation of the containing document to its default orientation and returns a Promise. 

ScreenOrientation.unlock()

Unlocks the orientation of the containing document from its default orientation.