code: function startCameraDefaultResolution () {
    let facingMode = facingModeSelectElement.value;
    cameraPhoto.startCamera(FACING_MODES[facingMode])
      .then(() => {
        let log =
            `Camera started with default resolution and ` +
            `prefered facingMode : ${facingMode}`;
        console.log(log);
      })
      .catch((error) => {
        console.error('Camera not started!', error);
      });
  }
docs: start the camera with prefered environment facingMode ie. () if the environment facingMode is not avalible, it will fallback to the default camera avalible.