Perhaps you wish to avoid superzooming in on a model’s face or some other area. Simply use limitRange.
* limitRange: Limit the range of the view. * level: The zoom level of trigger limit. Default: “130%”. * top: Top area range. Default: 1.0. Value range: 0.1 ~ 1.0. * bottom: Bottom area range. Default: 1.0. Value range: 0.1 ~ 1.0. * left: Left area range. Default: 1.0. Value range: 0.1 ~ 1.0. * right: Right area range. Default: 1.0. Value range: 0.1 ~ 1.0.