411行progress事件需要加判断

[zyp199737]

this.$video.addEventListener('progress', (e) => {
if(this.$video.onprogress){
this.video.loaded = (-1 + (this.$video.buffered.end(0) / this.$video.duration)) * 100
}
})

加上this.$video.onprogress判断，否则会报错，因为超出范围了。

[hilongjw]

@zyp199737 欢迎提交 PR