Screen

The Screen interface represents a screen, usually the one on which the current window is being rendered, and is obtained using window.screen.

Note that browsers determine which screen to report as current by detecting which screen has the center of the browser window.

Instance properties

Also inherits properties from its parent EventTarget.

Screen.availHeight: Specifies the height of the screen, in pixels, minus permanent or semipermanent user interface features displayed by the operating system, such as the Taskbar on Windows.
Screen.availWidth: Returns the amount of horizontal space in pixels available to the window.
Screen.colorDepth: Returns the color depth of the screen.
Screen.height: Returns the height of the screen in pixels.
Screen.isExtended Secure context: Returns true if the user's device has multiple screens, and false if not.
Screen.orientation: Returns the ScreenOrientation instance associated with this screen.
Screen.pixelDepth: Gets the bit depth of the screen.
Screen.width: Returns the width of the screen.
Screen.mozEnabled: Boolean. Setting to false will turn off the device's screen.
Screen.mozBrightness: Controls the brightness of a device's screen. A double between 0 and 1.0 is expected.

Non-standard properties

The following properties are specified as part of the Window Management API, which makes them available on the ScreenDetailed interface; this is where we have chosen to document them. However, non-standard versions of these properties are available on the Screen interface in browsers that don't support that API. See this page's Browser compatibility table for details of the non-standard support.

Screen.availLeft Read only Secure context: A number representing the x-coordinate (left-hand edge) of the available screen area.
Screen.availTop Read only Secure context: A number representing the y-coordinate (top edge) of the available screen area.
Screen.left Read only Secure context: A number representing the x-coordinate (left-hand edge) of the total screen area.
Screen.top Read only Secure context: A number representing the y-coordinate (top edge) of the total screen area.

Instance methods

Also inherits methods from its parent EventTarget.

Screen.lockOrientation: Lock the screen orientation (only works in fullscreen or for installed apps)
Screen.unlockOrientation: Unlock the screen orientation (only works in fullscreen or for installed apps)

Events

change Secure context: Fired on a specific screen when it changes in some way — width or height, available width or height, color depth, or orientation.
orientationchange: Fires when the screen orientation changes.

Examples

if (screen.colorDepth < 8) {
  // use low-color version of page
} else {
  // use regular, colorful page
}

Specifications

CSSOM View Module