(Swiper) 해상도에 따라 스와이퍼 기능 없애기

var Swiper = undefined;
    function initSwiper(){ 
        var screenWidth = $(window).width();
        if(screenWidth < 992 && secSwiper == undefined){
           secSwiper = new Swiper('.sec-swiper .swiper-container',{
                slidesPerView: 'auto',    
            });
        }else if(screenWidth > 991 && Swiper != undefined){
           Swiper.destroy();
           Swiper = undefined;
            $('.swiper-wrapper').removeAttr('style');
            $('.swiper-slide').removeAttr('style');
        }
    }
 
    initSwiper();
 
    $(window).on('resize', function(){
        initSwiper();
    });