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>