livewire-4
Build Livewire 4 components and applications. Use when creating reactive Laravel interfaces, single-file components, multi-file components, page components, forms, actions, or any Livewire-based UI. Triggers include "Livewire component", "wire:model", "wire:click", building interactive Laravel UIs, or working with Livewire 4 projects.
What this skill does
# Livewire 4
Build dynamic, reactive interfaces with PHP — no JavaScript required.
## Component Formats
### Single-file (default, recommended)
```php
<?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 }}">{{ $item }}</li>
@endforeach
</div>
```
### Multi-file (for complex components)
```bash
php artisan make:livewire post.create --mfc
```
Creates: `resources/views/components/post/⚡create/` with separate `.php`, `.blade.php`, `.js`, `.css` files.
### Page components
```bash
php artisan make:livewire pages::post.create
```
Route with: `Route::livewire('/posts/create', 'pages::post.create');`
## Core Patterns
### Properties
- Public properties auto-available in Blade
- Use `$this->reset('prop')` to reset
- Use `$this->fill([...])` for bulk assignment
- Protected properties hidden from client (not persisted)
### Data Binding
```html
<input wire:model="title"> <!-- Syncs on action -->
<input wire:model.live="search"> <!-- Syncs on input -->
<input wire:model.blur="email"> <!-- Syncs on blur -->
```
### Actions
```html
<button wire:click="save">Save</button>
<button wire:click="delete({{ $id }})">Delete</button>
<form wire:submit="store">...</form>
```
### Computed Properties
```php
use Livewire\Attributes\Computed;
#[Computed]
public function posts()
{
return Post::latest()->get();
}
```
Access in Blade: `$this->posts`
### Event Modifiers
- `wire:click.prevent` - preventDefault
- `wire:keydown.enter` - specific key
- `wire:click.debounce.500ms` - debounce
- `wire:submit.throttle` - throttle
### Loading States
```html
<button wire:click="save" class="data-loading:opacity-50">
Save
</button>
<span class="not-data-loading:hidden">Saving...</span>
```
### Confirmation
```html
<button wire:click="delete" wire:confirm="Are you sure?">Delete</button>
```
## Security
**Always validate and authorize** — public properties can be manipulated client-side.
```php
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`
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