vue + ElementUI 关闭对话框清空验证，清除form表单

对话框右上角的close按钮（before-close：关闭前的回调，会暂停 Dialog 的关闭)

<el-dialog v-model="options" :before-close="closeDiv" width="500px" center>

<el-form  autoComplete="on" :model="addForm" :rules="addRules" ref="addForm">

<el-form-item :label="$t('ChooseStudy.studyTitle')" class="dropdown-box" prop="studyNames">
<el-select v-model="addForm.studyNames" multiple :placeholder="$t('ChooseStudy.pleaseChoose')">
<el-option v-for="item in studyOptions" :key="item.value" :label="item.label" :value="item">
</el-option>
</el-select>
</el-form-item>

</el-form>
</el-dialog>


closeDiv(){
  this.$refs['addForm'].resetFields()
}