swiper.onResize() Cannot read property 'onResize' of undefined

1，版本3.3.1
2，间歇性抽风，我修改了一下CSS就报错？！！！
3，经常性的不起作用，必须要setTimeout(...)等待几秒才起作用
4，于是我干脆：

var Myswiper = new Swiper('.swiper-container', {
        scrollbar: '.swiper-scrollbar',
        wrapperClass: 'swiper-wrapper',
        direction: 'vertical',
        speed:500,
        freeModeMomentumRatio : 0.5,
        freeModeMomentumBounceRatio:0.5,
        iOSEdgeSwipeThreshold : 50,
        slidesPerView: 'auto',
        freeMode: true,
        lazyLoading: true,
        observer:true,
        onReachBeginning: function (swiper) {
            console.log('到了第一个slide');
        },
        onReachEnd: function (swiper) {
            console.log('到了最后一个slide');

        },onTouchEnd: function (swiper) {
            //头部下拉刷新
            var leng = swiper.translate;
            console.log("trans end"+leng);
        },onTouchMove:function(swiper){
            var leng = swiper.translate;
            //console.log("trans move"+leng);
            
        },onTransitionEnd: function(swiper) {
            Myswiper.onResize();//就是这里。。。。
        }

    });

5，请问这个swiper.onResize() 为什么老是报错

---

刚才自己犯了一个低级错误，不小心把

.swiper-container{
  height:100%;
  width:100%;
}

这段代码删除后就不能拖动了，
另外：swiper.onResize() Cannot read property 'onResize' of undefined 这个错误

今天竟然不报错了，What The Fuck?!!!!!!