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Tim Basten
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---
name: livewire-development
description: "Develops reactive Livewire 4 components. Activates when creating, updating, or modifying Livewire components; working with wire:model, wire:click, wire:loading, or any wire: directives; adding real-time updates, loading states, or reactivity; debugging component behavior; writing Livewire tests; or when the user mentions Livewire, component, counter, or reactive UI."
license: MIT
metadata:
author: laravel
---
# Livewire Development
## When to Apply
Activate this skill when:
- Creating or modifying Livewire components
- Using wire: directives (model, click, loading, sort, intersect)
- Implementing islands or async actions
- Writing Livewire component tests
## Documentation
Use `search-docs` for detailed Livewire 4 patterns and documentation.
## Basic Usage
### Creating Components
```bash
# Single-file component (default in v4)
php artisan make:livewire create-post
# Multi-file component
php artisan make:livewire create-post --mfc
# Class-based component (v3 style)
php artisan make:livewire create-post --class
# With namespace
php artisan make:livewire Posts/CreatePost
```
### Converting Between Formats
Use `php artisan livewire:convert create-post` to convert between single-file, multi-file, and class-based formats.
### Choosing a Component Format
Before creating a component, check `config/livewire.php` for directory overrides, which change where files are stored. Then, look at existing files in those directories (defaulting to `app/Livewire/` and `resources/views/livewire/`) to match the established convention.
### Component Format Reference
| Format | Flag | Class Path | View Path |
|--------|------|------------|-----------|
| Single-file (SFC) | default | — | `resources/views/livewire/create-post.blade.php` (PHP + Blade in one file) |
| Multi-file (MFC) | `--mfc` | `app/Livewire/CreatePost.php` | `resources/views/livewire/create-post.blade.php` |
| Class-based | `--class` | `app/Livewire/CreatePost.php` | `resources/views/livewire/create-post.blade.php` |
| View-based | ⚡ prefix | — | `resources/views/livewire/create-post.blade.php` (Blade-only with functional state) |
Namespaced components map to subdirectories: `make:livewire Posts/CreatePost` creates files at `app/Livewire/Posts/CreatePost.php` and `resources/views/livewire/posts/create-post.blade.php`.
### Single-File Component Example
<!-- Single-File Component Example -->
```php
<?php
use Livewire\Component;
new class extends Component {
public int $count = 0;
public function increment(): void
{
$this->count++;
}
}
?>
<div>
<button wire:click="increment">Count: @{{ $count }}</button>
</div>
```
## Livewire 4 Specifics
### Key Changes From Livewire 3
These things changed in Livewire 4, but may not have been updated in this application. Verify this application's setup to ensure you follow existing conventions.
- Use `Route::livewire()` for full-page components (e.g., `Route::livewire('/posts/create', CreatePost::class)`); config keys renamed: `layout``component_layout`, `lazy_placeholder``component_placeholder`.
- `wire:model` now ignores child events by default (use `wire:model.deep` for old behavior); `wire:scroll` renamed to `wire:navigate:scroll`.
- Component tags must be properly closed; `wire:transition` now uses View Transitions API (modifiers removed).
- JavaScript: `$wire.$js('name', fn)``$wire.$js.name = fn`; `commit`/`request` hooks → `interceptMessage()`/`interceptRequest()`.
### New Features
- Component formats: single-file (SFC), multi-file (MFC), view-based components.
- Islands (`@island`) for isolated updates; async actions (`wire:click.async`, `#[Async]`) for parallel execution.
- Deferred/bundled loading: `defer`, `lazy.bundle` for optimized component loading.
| Feature | Usage | Purpose |
|---------|-------|---------|
| Islands | `@island(name: 'stats')` | Isolated update regions |
| Async | `wire:click.async` or `#[Async]` | Non-blocking actions |
| Deferred | `defer` attribute | Load after page render |
| Bundled | `lazy.bundle` | Load multiple together |
### New Directives
- `wire:sort`, `wire:intersect`, `wire:ref`, `.renderless`, `.preserve-scroll` are available for use.
- `data-loading` attribute automatically added to elements triggering network requests.
| Directive | Purpose |
|-----------|---------|
| `wire:sort` | Drag-and-drop sorting |
| `wire:intersect` | Viewport intersection detection |
| `wire:ref` | Element references for JS |
| `.renderless` | Component without rendering |
| `.preserve-scroll` | Preserve scroll position |
## Best Practices
- Always use `wire:key` in loops
- Use `wire:loading` for loading states
- Use `wire:model.live` for instant updates (default is debounced)
- Validate and authorize in actions (treat like HTTP requests)
## Configuration
- `smart_wire_keys` defaults to `true`; new configs: `component_locations`, `component_namespaces`, `make_command`, `csp_safe`.
## Alpine & JavaScript
- `wire:transition` uses browser View Transitions API; `$errors` and `$intercept` magic properties available.
- Non-blocking `wire:poll` and parallel `wire:model.live` updates improve performance.
For interceptors and hooks, see [reference/javascript-hooks.md](reference/javascript-hooks.md).
## Testing
<!-- Testing Example -->
```php
Livewire::test(Counter::class)
->assertSet('count', 0)
->call('increment')
->assertSet('count', 1);
```
## Verification
1. Browser console: Check for JS errors
2. Network tab: Verify Livewire requests return 200
3. Ensure `wire:key` on all `@foreach` loops
## Common Pitfalls
- Missing `wire:key` in loops → unexpected re-rendering
- Expecting `wire:model` real-time → use `wire:model.live`
- Unclosed component tags → syntax errors in v4
- Using deprecated config keys or JS hooks
- Including Alpine.js separately (already bundled in Livewire 4)

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# Livewire 4 JavaScript Integration
## Interceptor System (v4)
### Intercept Messages
```js
Livewire.interceptMessage(({ component, message, onFinish, onSuccess, onError }) => {
onFinish(() => { /* After response, before processing */ });
onSuccess(({ payload }) => { /* payload.snapshot, payload.effects */ });
onError(() => { /* Server errors */ });
});
```
### Intercept Requests
```js
Livewire.interceptRequest(({ request, onResponse, onSuccess, onError, onFailure }) => {
onResponse(({ response }) => { /* When received */ });
onSuccess(({ response, responseJson }) => { /* Success */ });
onError(({ response, responseBody, preventDefault }) => { /* 4xx/5xx */ });
onFailure(({ error }) => { /* Network failures */ });
});
```
### Component-Scoped Interceptors
```blade
<script>
this.$intercept('save', ({ component, onSuccess }) => {
onSuccess(() => console.log('Saved!'));
});
</script>
```
## Magic Properties
- `$errors` - Access validation errors from JavaScript
- `$intercept` - Component-scoped interceptors

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---
name: tailwindcss-development
description: "Styles applications using Tailwind CSS v4 utilities. Activates when adding styles, restyling components, working with gradients, spacing, layout, flex, grid, responsive design, dark mode, colors, typography, or borders; or when the user mentions CSS, styling, classes, Tailwind, restyle, hero section, cards, buttons, or any visual/UI changes."
license: MIT
metadata:
author: laravel
---
# Tailwind CSS Development
## When to Apply
Activate this skill when:
- Adding styles to components or pages
- Working with responsive design
- Implementing dark mode
- Extracting repeated patterns into components
- Debugging spacing or layout issues
## Documentation
Use `search-docs` for detailed Tailwind CSS v4 patterns and documentation.
## Basic Usage
- Use Tailwind CSS classes to style HTML. Check and follow existing Tailwind conventions in the project before introducing new patterns.
- Offer to extract repeated patterns into components that match the project's conventions (e.g., Blade, JSX, Vue).
- Consider class placement, order, priority, and defaults. Remove redundant classes, add classes to parent or child elements carefully to reduce repetition, and group elements logically.
## Tailwind CSS v4 Specifics
- Always use Tailwind CSS v4 and avoid deprecated utilities.
- `corePlugins` is not supported in Tailwind v4.
### CSS-First Configuration
In Tailwind v4, configuration is CSS-first using the `@theme` directive — no separate `tailwind.config.js` file is needed:
<!-- CSS-First Config -->
```css
@theme {
--color-brand: oklch(0.72 0.11 178);
}
```
### Import Syntax
In Tailwind v4, import Tailwind with a regular CSS `@import` statement instead of the `@tailwind` directives used in v3:
<!-- v4 Import Syntax -->
```diff
- @tailwind base;
- @tailwind components;
- @tailwind utilities;
+ @import "tailwindcss";
```
### Replaced Utilities
Tailwind v4 removed deprecated utilities. Use the replacements shown below. Opacity values remain numeric.
| Deprecated | Replacement |
|------------|-------------|
| bg-opacity-* | bg-black/* |
| text-opacity-* | text-black/* |
| border-opacity-* | border-black/* |
| divide-opacity-* | divide-black/* |
| ring-opacity-* | ring-black/* |
| placeholder-opacity-* | placeholder-black/* |
| flex-shrink-* | shrink-* |
| flex-grow-* | grow-* |
| overflow-ellipsis | text-ellipsis |
| decoration-slice | box-decoration-slice |
| decoration-clone | box-decoration-clone |
## Spacing
Use `gap` utilities instead of margins for spacing between siblings:
<!-- Gap Utilities -->
```html
<div class="flex gap-8">
<div>Item 1</div>
<div>Item 2</div>
</div>
```
## Dark Mode
If existing pages and components support dark mode, new pages and components must support it the same way, typically using the `dark:` variant:
<!-- Dark Mode -->
```html
<div class="bg-white dark:bg-gray-900 text-gray-900 dark:text-white">
Content adapts to color scheme
</div>
```
## Common Patterns
### Flexbox Layout
<!-- Flexbox Layout -->
```html
<div class="flex items-center justify-between gap-4">
<div>Left content</div>
<div>Right content</div>
</div>
```
### Grid Layout
<!-- Grid Layout -->
```html
<div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
<div>Card 1</div>
<div>Card 2</div>
<div>Card 3</div>
</div>
```
## Common Pitfalls
- Using deprecated v3 utilities (bg-opacity-*, flex-shrink-*, etc.)
- Using `@tailwind` directives instead of `@import "tailwindcss"`
- Trying to use `tailwind.config.js` instead of CSS `@theme` directive
- Using margins for spacing between siblings instead of gap utilities
- Forgetting to add dark mode variants when the project uses dark mode