...Default,\n      ...config\n    }\n    Util.typeCheckConfig(NAME, config, DefaultType)\n    return config\n  }\n\n  _handleSwipe() {\n    const absDeltax = Math.abs(this.touchDeltaX)\n\n    if (absDeltax <= SWIPE_THRESHOLD) {\n      return\n    }\n\n    const direction = absDeltax / this.touchDeltaX\n\n    this.touchDeltaX = 0\n\n    // swipe left\n    if (direction > 0) {\n      this.prev()\n    }\n\n    // swipe right\n    if (direction < 0) {\n      this.next()\n    }\n  }\n\n  _addEventListeners()...