upccrt/resources/js/views/App.vue

<template>
    <div>
        <nav class="navbar navbar-expand navbar-dark bg-primary text-light shadow-sm">
            <div class="container-fluid">
                <router-link :to="{name: 'home'}" class="navbar-brand">
                    UPCCRT
                </router-link>
                <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false">
                    <span class="navbar-toggler-icon"></span>
                </button>

                <div class="collapse navbar-collapse" id="navbarSupportedContent">
                    <!-- Left Side Of Navbar -->
                    <ul class="navbar-nav mr-auto text-center">
                        <li class="nav-item">
                            <a href="#" class="nav-link"><i class="fas fa-sign-in-alt"></i> <span class="d-none d-sm-block d-md-inline">Check-In</span></a>
                        </li>
                        <li class="nav-item">
                            <a href="#" class="nav-link"><i class="fas fa-sign-out-alt"></i> <span class="d-none d-sm-block d-md-inline">Check-Out</span></a>
                        </li>
                        <li class="nav-item">
                            <a href="#" class="nav-link"><i class="fas fa-tachometer-alt"></i> <span class="d-none d-sm-block d-md-inline">Dashboard</span></a>
                        </li>
                        <li class="nav-item">
                            <a href="#" class="nav-link"><i class="fas fa-chart-bar"></i> <span class="d-none d-sm-block d-md-inline">Reports</span></a>
                        </li>
                    </ul>

                    <!-- Right Side Of Navbar -->
                    <ul class="navbar-nav ml-auto">
                        <!-- Authentication Links -->
                        <router-link :to="{ name: 'login' }" class="nav-link" v-if="!isLoggedIn">Login</router-link>
                        <li class="nav-link" v-if="isLoggedIn">{{username}}</li>
                        <router-link :to="{ name: 'home'}" class="nav-link" v-if="isLoggedIn">Home</router-link>
                        <!-- @guest
                            <li class="nav-item">
                                <a class="nav-link" href="{{ route('login') }}">{{ __('Login') }}</a>
                            </li>
                            @if (Route::has('register'))
                                <li class="nav-item">
                                    <a class="nav-link" href="{{ route('register') }}">{{ __('Register') }}</a>
                                </li>
                            @endif
                        @else
                            <li class="nav-item dropdown">
                                <a id="navbarDropdown" class="nav-link dropdown-toggle" href="#" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false" v-pre>
                                    {{ Auth::user()->username }} <span class="caret"></span>
                                </a>

                                <div class="dropdown-menu dropdown-menu-right" aria-labelledby="navbarDropdown">
                                    <a class="dropdown-item" href="{{ route('logout') }}"
                                       onclick="event.preventDefault();
                                                     document.getElementById('logout-form').submit();">
                                        {{ __('Logout') }}
                                    </a>

                                    <form id="logout-form" action="{{ route('logout') }}" method="POST" style="display: none;">
                                        @csrf
                                    </form>
                                </div>
                            </li>
                        @endguest -->
                    </ul>
                </div>
            </div>
        </nav>
        <main class="py-4">
            <router-view></router-view>
        </main>
    </div>
</template>
<script>
export default {
    data () {
        return {
            isLoggedIn : null,
            username : null
        }
    },
    mounted () {
        this.isLoggedIn = localStorage.getItem('jwt')
        this.username = localStorage.getItem('user')
    }
}
</script>