element select 多选，真正失去焦点

解决方法如下：this.$refs.mutipleSelect.$refs.input.blur

<el-select class="studySelect w-284"
  :placeholder="$t('public.siteInfo.5lq90luzubo0')"
  v-model="centerId"
  multiple
  collapse-tags
  filterable
  clearable
  @focus="blurSelect"
  @clear="refreshData"
  @remove-tag="refreshData"
   ref="mutipleSelect"
>

blurSelect() {
 this.$refs.mutipleSelect.$refs.input.blur = () => {
    this.refreshData();
  };
}

参考：https://www.jb51.net/article/262461.htm