E_SHOW)\n\n      if (!callback) {\n        return\n      }\n\n      if (!animate) {\n        callback()\n        return\n      }\n\n      const backdropTransitionDuration = Util.getTransitionDurationFromElement(this._backdrop)\n\n      $(this._backdrop)\n        .one(Util.TRANSITION_END, callback)\n        .emulateTransitionEnd(backdropTransitionDuration)\n    } else if (!this._isShown && this._backdrop) {\n      $(this._backdrop).removeClass(CLASS_NAME_SHOW)\n\n      const callbackRemove = () =>...