mounted() {
      var self = this;
      for (var i = 0; i < self.$refs.mySwiper.swiper.pagination.bullets.length; i++) {
       console.log(self.$refs.mySwiper.swiper)
       console.log(this.$refs.mySwiper.swiper)
        self.$refs.mySwiper.swiper.pagination.bullets[i].onmouseover = (function(num) {
          return function () {
            self.$refs.mySwiper.swiper.slideTo(num + 1);
          }
        })(i)
      }
    }