Web/API/MediaTrackSettings/facingMode

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.

Syntax

var facingMode = MediaTrackSettings.facingMode;

Value

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

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.

"user": The video source is facing toward the user; this includes, for example, the front-facing camera on a smartphone.
"environment": The video source is facing away from the user, thereby viewing their environment. This is the back camera on a smartphone.
"left": 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.
"right": 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.

Example

See Example: Constraint exerciser in Capabilities, constraints, and settings for an example.

Specifications

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

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`facingMode`	Chrome Full support Yes	Edge Full support ≤79	Firefox Full support 69	IE No support No	Opera Full support Yes	Safari ?	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android No support No	Opera Android Full support Yes	Safari iOS ?	Samsung Internet Android Full support Yes

Legend

Full support: Full support
No support: No support
Compatibility unknown: Compatibility unknown