facingMode property is a
DOMString indicating the direction in which the camera producing the video track represented by the
MediaStreamTrack is currently facing. This lets you determine what value was selected to comply with your specified constraints for this property's value as described in the
MediaTrackConstraints.facingMode property you provided when calling either
If needed, you can determine whether or not this constraint is supported by checking the value of
MediaTrackSupportedConstraints.facingMode as returned by a call to
MediaDevices.getSupportedConstraints(). However, typically this is unnecessary since browsers will simply ignore any constraints they're unfamiliar with.
var facingMode = MediaTrackSettings.facingMode;
DOMString whose value is one of the strings in
The following strings are permitted values for the facing mode. These may represent separate cameras, or they may represent directions in which an adjustable camera can be pointed.
- The video source is facing toward the user; this includes, for example, the front-facing camera on a smartphone.
- The video source is facing away from the user, thereby viewing their environment. This is the back camera on a smartphone.
- The video source is facing toward the user but to their left, such as a camera aimed toward the user but over their left shoulder.
- The video source is facing toward the user but to their right, such as a camera aimed toward the user but over their right shoulder.
See "Example: Constraint exerciser" in Capabilities, constraints, and settings for an example.
|Media Capture and Streams
The definition of 'facingMode' in that specification.
|Editor's Draft||Initial specification.|
|Feature||Chrome||Firefox (Gecko)||Internet Explorer||Opera||Safari|
|Basic support||(Yes)||36 (36)||No support||(Yes)||?|
|Feature||Android||Android Webview||Firefox Mobile (Gecko)||IE Mobile||Opera Mobile||Safari Mobile||Chrome for Android|
|Basic support||?||(Yes)||36.0 (36)||No support||?||?||(Yes)|