The MediaTrackSettings dictionary's 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 getUserMedia() or MediaStreamTrack.applyConstraints().

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.

Because RTP doesn't include this information, tracks associated with a WebRTC RTCPeerConnection will never include this property.


var facingMode = MediaTrackSettings.facingMode;


A DOMString whose value is one of the strings in VideoFacingModeEnum.


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.


Specification Status Comment
Media Capture and Streams
The definition of 'facingMode' in that specification.
Candidate Recommendation Initial specification.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
facingModeChrome Full support YesEdge Full support ≤79Firefox Full support 69IE No support NoOpera Full support YesSafari ? WebView Android Full support YesChrome Android Full support YesFirefox Android No support NoOpera Android Full support YesSafari iOS ? Samsung Internet Android Full support Yes


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See also