in lib/webcam-easy.js [7:17]
constructor(webcamElement, facingMode = 'user', canvasElement = null, snapSoundElement = null) {
this._webcamElement = webcamElement;
this._webcamElement.width = this._webcamElement.width || 640;
this._webcamElement.height = this._webcamElement.height || video.width * (3 / 4);
this._facingMode = facingMode;
this._webcamList = [];
this._streamList = [];
this._selectedDeviceId = '';
this._canvasElement = canvasElement;
this._snapSoundElement = snapSoundElement;
}