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 screen.orientation property.

Instance properties

ScreenOrientation.type Read only: Returns the document's current orientation type, one of portrait-primary, portrait-secondary, landscape-primary, or landscape-secondary.
ScreenOrientation.angle Read only: Returns the document's current orientation angle.

Instance methods

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.

Events

Listen to these events using addEventListener() or by assigning an event listener to the oneventname property of this interface.

change: Fired whenever the screen changes orientation.

Example

In the following example, we listen for an orientation change event and log the new screen orientation type and angle.

js

screen.orientation.addEventListener("change", (event) => {
  const type = event.target.type;
  const angle = event.target.angle;
  console.log(`ScreenOrientation change: ${type}, ${angle} degrees.`);
});

Specifications

Screen Orientation