Laravel 8 Livewire component Undefined variable: header

Question

I have created a Livewire component in Jetstream and I have set it as a full-page component in the web.php route page as follows:

use App\Http\Livewire\PostComponent;
...
Route::get('posts/',PostComponent::class)->name('posts');

The post-component.blade.php file has originally the following code:

<div>
    <h1>If you look to others for fulfillment, you will never truly be fulfilled.</h1>
</div>

If I hit the URL .../posts I get the following error:

Undefined variable: header (View: /home/vagrant/laravelapp/resources/views/layouts/app.blade.php)

So I have tried adding the slot in the post-component.blade.php file:

<x-app-layout>
    <x-slot name="header">
        <h2 class="font-semibold text-xl text-gray-800 leading-tight">
            {{ __('Dashboard') }}
        </h2>
    </x-slot>
    <div>
        <h1>If you look to others for fulfillment, you will never truly be fulfilled.</h1>
    </div>
</x-app-layout>

Nevertheless, I get that same error.

What am I missing? How do I fix this?

Check if slot header exists in the component x-app-layout — tirta keniten
Thanks. I am checking this GitHub issue link given by M Irfan. — Pathros

Irfan Irfan · Accepted Answer · 2020-12-16T08:02:22

I hope this is a Jetstream project. By default, livewire will use the app.blade.php as the layout. And the component will get rendered in the slot of the app.blade.php.

But since it's a Jetstream project, it has a slot for the header in the layout file.

  <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>

So to resolve this error, there are two approaches.

give the header as the variable for the layout as below in your PostComponent.php


 public function render()
 {
        return view('livewire.post-component')
         ->layout('layouts.app', ['header' => 'Post Compoent Page']);
 }

Create your own layout and only have a slot. (imagine mylayout.blade.php)


<head>
    @livewireStyles
</head>
<body>
    {{ $slot }}

    @livewireScripts
</body>

and use that layout when rendering the livewire component

public function render()
{
   return view('livewire.post-component')->layout('layouts.mylayout');
}

There is a github issue regarding this topic (a closed one). But keep an eye on it. since Jetstream is in it's early stages.

Laravel 8 Livewire component Undefined variable: header

1 Answers