element-ui dropdown点击事件
<el-dropdown-item class="link" @click.native="signout" style="border-top: 1px solid #ddd">
退出登录
</el-dropdown-item>
<el-dropdown-item class="link" @click.native="signout" style="border-top: 1px solid #ddd">
退出登录
</el-dropdown-item>