nextElementIndex = this._getItemIndex(nextElement)\n    const isCycling = Boolean(this._interval)\n\n    let directionalClassName\n    let orderClassName\n    let eventDirectionName\n\n    if (direction === DIRECTION_NEXT) {\n      directionalClassName = CLASS_NAME_LEFT\n      orderClassName = CLASS_NAME_NEXT\n      eventDirectionName = DIRECTION_LEFT\n    } else {\n      directionalClassName = CLASS_NAME_RIGHT\n      orderClassName = CLASS_NAME_PREV\n      eventDirectionName = DIRECTION_RIGHT\n  ...

this._setActiveIndicatorElement(nextElementIndex)\n    this._activeElement = nextElement\n\n    const directionalClassName = isNext ? CLASS_NAME_START : CLASS_NAME_END\n    const orderClassName = isNext ? CLASS_NAME_NEXT : CLASS_NAME_PREV\n\n    nextElement.classList.add(orderClassName)\n\n    reflow(nextElement)\n\n    activeElement.classList.add(directionalClassName)\n    nextElement.classList.add(directionalClassName)\n\n    const completeCallBack = () => {\n      nextElement.classList.remove(directionalClassName,...