check for header's existence

Author: taylorotwell

stubs/livewire/resources/views/layouts/app.blade.php

@@ -25,11 +25,13 @@
             @livewire('navigation-menu')
 
             <!-- Page Heading -->
-            <header class="bg-white shadow">
-                <div class="max-w-7xl mx-auto py-6 px-4 sm:px-6 lg:px-8">
-                    {{ $header }}
-                </div>
-            </header>
+            @if (isset($header))
+                <header class="bg-white shadow">
+                    <div class="max-w-7xl mx-auto py-6 px-4 sm:px-6 lg:px-8">
+                        {{ $header }}
+                    </div>
+                </header>
+            @endif
 
             <!-- Page Content -->
             <main>