走马灯问题

[lu1457596030]

走马灯中的属性beforeChange,

<a-carousel arrows effect="fade" ref="varousel" :beforeChange="onChange">
<div>0</div>
<div>1</div>
<div>2</div>
<div>3</div>
<div>4</div>
</a-carousel>
beforeChange(from, to) {
// from 一直是未定义的 ?????
this.$refs.varousel.goTo(0) // 不起作用 ?????
}