swiper가 loop일때 해당 인덱스로 가는 기능

const swiper = new Swiper(".swiper", {
    mousewheel: {
        sensitivity: 1,
    },
    direction: "vertical",
    loop: true,
    parallax: false,
    speed: 500,
    touchRatio: 0,
    slidesPerView: 1.115,
});

swiper.on("slideChange", function (e) {
    cateBtnActive(swiper.realIndex);
    focusArrowMoveEvent(swiper.realIndex);
    slidePageView();
});

slidePageView();
focusArrowMoveEvent(0);

/**
 * 슬라이드 페이지 넘버 표시
 */
function slidePageView() {
    $(".currentSlideNum").text(swiper.realIndex + 1);
    $(".allSlideNum").text(swiper.slides.length - 4);
}

/**
 * 왼쪽의 네비메뉴 버튼 event
 */
$(".cateBtn").on({
    click: function () {
        var idx = $(this).parent().index();
        swiper.slideToLoop(idx);
    },
});