VRDisplay.getPose()

getPose();

if(navigator.getVRDisplays) {
  console.log('WebVR 1.1 supported');
  // Then get the displays attached to the computer
  navigator.getVRDisplays().then(function(displays) {
    // If a display is available, use it to present the scene
    if(displays.length > 0) {
      vrDisplay = displays[0];
      console.log('Display found');
          // Return the current VRPose object for the display
          var pose = vrDisplay.getPose();
          ...
    }
  });
}