有點怪的 bug, mobile 版的 slidesPerGroup 只能設為 1
    var slidesPerGroup = 5;
    if (S3JS.isMobile()) {
        slidesPerGroup = 1; // 很奇怪, Mobile 版時, 若是設定 slidesPerGroup = 5 時, 剛進入時會看到最後一組商品.
    }
    //beauty-coin-exchange-loading
    var swiperPreview = new Swiper('.beauty-coin-exchange-swiper', {
        slidesPerView: 5,
        slidesPerColumn: 1,
        slidesPerGroup: slidesPerGroup,
        spaceBetween: 0,
        loop: true,
        breakpoints: {
            768: {
                slidesPerView: 4.3,
                spaceBetween: 10,
            }
        },
        nextButton: '.beauty-coin-next',
        prevButton: '.beauty-coin-prev',
    });