baoshi-was/resources/views/maintenance/emails/menu.blade.php

<div class="container-fluid nav3">
    <div class="card" >
        <ul class="nav nav-pills">
            @can('邮件-查询')
            <li class="nav-item">
                <a target="maintenance/mail" class="nav-link" href="{{url('maintenance/mail')}}" :class="{active:isActive('',3)}">查询</a>
            </li> @endcan
            {{$slot}}
        </ul>
    </div>
</div>