elementui加载完成事件

<el-dialog
  ref="dialog"
  width="60vw"
  title="实时视频"
  :close-on-click-modal="false"
  :visible.sync="visible"
  :modal-append-to-body="false"
  :append-to-body="false"
  @open="localVideoPlay"
  @close="onClose"
>

localVideoPlay(){
  this.$nextTick(() => {
    this.$refs.localVideo.init(this.device)
  });
},