element-ul 处理 组件内的弹出框close问题

  <el-dialog
            custom-class="rental-pop"
            :close-on-click-modal="false"
            :append-to-body="true"
            title="租赁详情"
            width="30%"
            :visible.sync="dialogShow"
            :before-close='close'
            >
            <div class="content rental-box">
             
            </div>
            <span slot="footer" class="dialog-footer">
                <el-button type="primary" @click="close">取 消</el-button>
            </span>
   </el-dialog>

　　

:before-close='组件内的方法去出发外部属性' 设置组件内的弹出框close问题