code: function forLeft(props) {
    const { position, scene, scenes } = props;
    const interpolate = getSceneIndicesForInterpolationInputRange(props);
  
    if (!interpolate) return { opacity: 0 };
  
    const { first, last } = interpolate;
    const index = scene.index;
  
    return {
      opacity: position.interpolate(crossFadeInterpolation(first, index, last)),
    };
  }
docs: Utility that builds the style for the navigation header.
  
  +-------------+-------------+-------------+
  |             |             |             |
  |    Left     |   Title     |   Right     |
  |  Component  |  Component  | Component   |
  |             |             |             |
  +-------------+-------------+-------------+