package js.html; typedef MediaTrackCapabilities = { @:optional var aspectRatio : DoubleRange; @:optional var autoGainControl : Array; @:optional var channelCount : ULongRange; @:optional var deviceId : String; @:optional var echoCancellation : Array; @:optional var facingMode : Array; @:optional var frameRate : DoubleRange; @:optional var groupId : String; @:optional var height : ULongRange; @:optional var latency : DoubleRange; @:optional var noiseSuppression : Array; @:optional var resizeMode : Array; @:optional var sampleRate : ULongRange; @:optional var sampleSize : ULongRange; @:optional var width : ULongRange; };