Livewire 4

Livewire 4

Build dynamic, reactive interfaces with PHP — no JavaScript required.

Component Formats

Single-file (default, recommended)

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<?php // resources/views/components/⚡todos.blade.php
use Livewire\Component;
new class extends Component {
    public $todos = [];
    public $todo = '';
    
    public function add()
    {
        $this->todos[] = $this->todo;
        $this->reset('todo');
    }
};
?>
<div>
    <input type="text" wire:model="todo">
    <button wire:click="add">Add</button>
    @foreach ($todos as $item)
        <li wire:key="{{ $loop->index }}">{{ $item }}</li>
    @endforeach
</div>

Multi-file (for complex components)

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php artisan make:livewire post.create --mfc

Creates: resources/views/components/post/⚡create/ with separate .php, .blade.php, .js, .css files.

Page components

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php artisan make:livewire pages::post.create

Route with: Route::livewire('/posts/create', 'pages::post.create');

Core Patterns

Properties

• Public properties auto-available in Blade
• Use $this->reset('prop') to reset
• Use $this->fill([...]) for bulk assignment
• Protected properties hidden from client (not persisted)

Data Binding

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<input wire:model="title">           <!-- Syncs on action -->
<input wire:model.live="search">     <!-- Syncs on input -->
<input wire:model.blur="email">      <!-- Syncs on blur -->

Actions

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<button wire:click="save">Save</button>
<button wire:click="delete({{ $id }})">Delete</button>
<form wire:submit="store">...</form>

Computed Properties

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use Livewire\Attributes\Computed;

#[Computed]
public function posts()
{
    return Post::latest()->get();
}

Access in Blade: $this->posts

Event Modifiers

• wire:click.prevent - preventDefault
• wire:keydown.enter - specific key
• wire:click.debounce.500ms - debounce
• wire:submit.throttle - throttle

Loading States

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<button wire:click="save" class="data-loading:opacity-50">
    Save
</button>
<span class="not-data-loading:hidden">Saving...</span>

Confirmation

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<button wire:click="delete" wire:confirm="Are you sure?">Delete</button>

Security

Always validate and authorize — public properties can be manipulated client-side.

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public function delete(Post $post)
{
    $this->authorize('delete', $post);
    $post->delete();
}

Detailed References

Load these as needed:

• Components deep dive: See references/components.md
• Properties & state: See references/properties.md
• Actions & events: See references/actions.md