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Update activeContext.md and productContext.md with new project information and context
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memory-bank/research/alpine-optimization-strategies.md
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memory-bank/research/alpine-optimization-strategies.md
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# Alpine.js Optimization Strategies and Best Practices
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## Research Summary
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Comprehensive research from Alpine.js documentation focusing on performance optimization, component patterns, and best practices for the ThrillWiki frontend redesign.
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## Performance Optimization Strategies
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### 1. Component Initialization and Lifecycle
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#### Efficient Component Registration
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```javascript
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document.addEventListener('alpine:init', () => {
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Alpine.data('dropdown', () => ({
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open: false,
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toggle() {
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this.open = !this.open
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},
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destroy() {
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// Clean up resources to prevent memory leaks
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clearInterval(this.timer);
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}
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}))
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})
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```
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#### Performance Measurement
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```javascript
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window.start = performance.now();
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document.addEventListener('alpine:initialized', () => {
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setTimeout(() => {
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console.log(performance.now() - window.start);
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});
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});
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```
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### 2. Event Handling Optimization
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#### Use .passive Modifier for Scroll Performance
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```html
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<div @touchstart.passive="...">...</div>
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<div @wheel.passive="...">...</div>
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```
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**Critical**: The `.passive` modifier prevents blocking the browser's scroll optimizations by indicating the listener won't call `preventDefault()`.
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#### Debounced Event Handling
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```html
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<input @input.debounce.300ms="search()" placeholder="Search...">
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```
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#### Efficient Event Delegation
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```html
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<div @click.outside="open = false" x-data="{ open: false }">
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<!-- Content -->
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</div>
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```
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### 3. Data Management Optimization
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#### Minimize Reactive Data
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```javascript
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Alpine.data('app', () => ({
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// Only make data reactive if it needs to trigger UI updates
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items: [], // Reactive - triggers UI updates
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_cache: {}, // Non-reactive - use for internal state
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get filteredItems() {
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// Use getters for computed properties
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return this.items.filter(item => item.active)
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}
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}))
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```
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#### Efficient Array Operations
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```javascript
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// Good: Use array methods that don't trigger full re-renders
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this.items.splice(index, 1); // Remove specific item
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this.items.push(newItem); // Add item
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// Avoid: Full array replacement when possible
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// this.items = this.items.filter(...) // Triggers full re-render
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```
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### 4. DOM Manipulation Optimization
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#### Use x-show vs x-if Strategically
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```html
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<!-- Use x-show for frequently toggled content -->
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<div x-show="isVisible" x-transition>
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Frequently toggled content
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</div>
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<!-- Use x-if for conditionally rendered content -->
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<template x-if="shouldRender">
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<div>Rarely shown content</div>
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</template>
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```
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#### Optimize x-for Loops
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```html
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<!-- Always use :key for efficient list updates -->
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<template x-for="item in items" :key="item.id">
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<div x-text="item.name"></div>
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</template>
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```
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#### Minimize DOM Queries
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```javascript
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Alpine.data('component', () => ({
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init() {
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// Cache DOM references in init()
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this.element = this.$el;
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this.container = this.$refs.container;
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}
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}))
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```
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### 5. Memory Management
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#### Proper Cleanup in destroy()
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```javascript
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Alpine.data('timer', () => ({
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timer: null,
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counter: 0,
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init() {
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this.timer = setInterval(() => {
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console.log('Increased counter to', ++this.counter);
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}, 1000);
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},
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destroy() {
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// Critical: Clean up to prevent memory leaks
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clearInterval(this.timer);
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}
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}))
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```
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#### Avoid Memory Leaks in Event Listeners
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```javascript
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Alpine.data('component', () => ({
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init() {
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// Use arrow functions to maintain context
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this.handleResize = () => this.onResize();
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window.addEventListener('resize', this.handleResize);
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},
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destroy() {
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window.removeEventListener('resize', this.handleResize);
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}
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}))
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```
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## Component Architecture Patterns
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### 1. Reusable Component Registration
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#### Global Component Registration
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```javascript
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Alpine.data('dropdown', () => ({
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open: false,
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toggle() {
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this.open = !this.open
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},
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// Encapsulate directive logic
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trigger: {
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['@click']() {
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this.toggle()
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}
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},
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dialogue: {
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['x-show']() {
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return this.open
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}
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}
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}))
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```
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#### Usage in Templates
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```html
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<div x-data="dropdown">
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<button x-bind="trigger">Toggle</button>
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<div x-bind="dialogue">Content</div>
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</div>
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```
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### 2. State Management Patterns
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#### Hierarchical Data Access
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```html
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<div x-data="{ open: false }">
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<div x-data="{ label: 'Content:' }">
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<span x-text="label"></span>
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<span x-show="open"></span> <!-- Accesses parent's open -->
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</div>
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</div>
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```
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#### Centralized State with $store
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```javascript
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Alpine.store('app', {
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user: null,
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parks: [],
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setUser(user) {
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this.user = user
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},
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addPark(park) {
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this.parks.push(park)
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}
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})
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```
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### 3. Advanced Interaction Patterns
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#### Custom Event Dispatching
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```html
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<div @park-created="handleParkCreated">
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<button @click="$dispatch('park-created', { park: newPark })">
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Create Park
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</button>
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</div>
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```
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#### Intersection Observer Integration
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```html
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<div x-data="{ shown: false }" x-intersect="shown = true">
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<div x-show="shown" x-transition>
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I'm in the viewport!
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</div>
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</div>
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```
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#### Watch for Reactive Updates
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```html
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<div x-data="{ search: '' }"
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x-init="$watch('search', value => console.log('Search:', value))">
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<input x-model="search" placeholder="Search...">
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</div>
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```
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## Integration with HTMX
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### 1. Complementary Usage Patterns
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#### HTMX for Server Communication, Alpine for Client State
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```html
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<div x-data="{ loading: false, count: 0 }">
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<button hx-post="/increment"
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hx-target="#result"
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@click="loading = true; count++"
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@htmx:after-request="loading = false">
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<span x-show="!loading">Increment</span>
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<span x-show="loading">Loading...</span>
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</button>
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<div id="result" x-text="'Local count: ' + count"></div>
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</div>
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```
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#### Coordinated State Updates
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```html
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<div x-data="{ items: [] }"
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@item-added.window="items.push($event.detail)">
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<form hx-post="/items"
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hx-target="#items-list"
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@htmx:after-request="$dispatch('item-added', { item: newItem })">
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<!-- Form fields -->
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</form>
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<div id="items-list"></div>
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</div>
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```
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### 2. Performance Coordination
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#### Efficient DOM Updates
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```html
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<!-- Use Alpine for immediate feedback -->
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<div x-data="{ optimisticUpdate: false }">
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<button @click="optimisticUpdate = true"
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hx-post="/action"
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hx-target="#result"
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@htmx:after-request="optimisticUpdate = false">
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<span x-show="!optimisticUpdate">Click me</span>
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<span x-show="optimisticUpdate">Processing...</span>
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</button>
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</div>
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```
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## ThrillWiki-Specific Optimizations
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### 1. Search Component Optimization
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```javascript
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Alpine.data('parkSearch', () => ({
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query: '',
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results: [],
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loading: false,
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async search() {
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if (!this.query.trim()) {
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this.results = [];
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return;
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}
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this.loading = true;
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try {
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// Use HTMX for actual search, Alpine for state
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const response = await fetch(`/search/parks/?q=${encodeURIComponent(this.query)}`);
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this.results = await response.json();
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} catch (error) {
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console.error('Search failed:', error);
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this.results = [];
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} finally {
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this.loading = false;
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}
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},
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get filteredResults() {
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return this.results.slice(0, 10); // Limit results for performance
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}
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}))
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```
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### 2. Photo Gallery Optimization
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```javascript
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Alpine.data('photoGallery', () => ({
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photos: [],
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currentIndex: 0,
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loading: false,
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init() {
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// Lazy load images as they come into view
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this.$nextTick(() => {
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this.setupIntersectionObserver();
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});
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},
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setupIntersectionObserver() {
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const observer = new IntersectionObserver((entries) => {
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entries.forEach(entry => {
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if (entry.isIntersecting) {
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const img = entry.target;
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img.src = img.dataset.src;
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observer.unobserve(img);
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}
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});
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});
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this.$el.querySelectorAll('img[data-src]').forEach(img => {
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observer.observe(img);
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});
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},
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destroy() {
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// Clean up observer
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if (this.observer) {
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this.observer.disconnect();
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}
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}
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}))
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```
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### 3. Form Validation Optimization
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```javascript
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Alpine.data('parkForm', () => ({
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form: {
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name: '',
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location: '',
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operator: ''
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},
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errors: {},
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validating: false,
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async validateField(field) {
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if (this.validating) return;
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this.validating = true;
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try {
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// Use HTMX for server-side validation
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const response = await fetch('/validate-park-field/', {
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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'X-CSRFToken': this.getCsrfToken()
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},
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body: JSON.stringify({
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field: field,
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value: this.form[field]
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})
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});
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const result = await response.json();
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if (result.errors) {
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this.errors[field] = result.errors;
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} else {
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delete this.errors[field];
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}
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} finally {
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this.validating = false;
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}
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},
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getCsrfToken() {
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return document.querySelector('[name=csrfmiddlewaretoken]').value;
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}
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}))
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```
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## Performance Monitoring
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### 1. Component Performance Tracking
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```javascript
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Alpine.data('performanceTracker', () => ({
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init() {
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const start = performance.now();
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this.$nextTick(() => {
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const end = performance.now();
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console.log(`Component initialized in ${end - start}ms`);
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});
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}
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}))
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```
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### 2. Memory Usage Monitoring
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```javascript
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// Monitor component count and memory usage
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setInterval(() => {
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if (performance.memory) {
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console.log('Memory usage:', {
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used: Math.round(performance.memory.usedJSHeapSize / 1048576) + 'MB',
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total: Math.round(performance.memory.totalJSHeapSize / 1048576) + 'MB'
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});
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}
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}, 10000);
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```
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## Implementation Priorities for ThrillWiki
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### High Priority
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1. **Component Registration**: Set up reusable components for common UI patterns
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2. **Event Optimization**: Use .passive modifiers for scroll events
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3. **Memory Management**: Implement proper cleanup in destroy() methods
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4. **State Management**: Optimize reactive data usage
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### Medium Priority
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1. **Intersection Observer**: Lazy loading for images and content
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2. **Performance Monitoring**: Track component initialization times
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3. **Advanced Patterns**: Custom event dispatching and coordination
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4. **Search Optimization**: Debounced search with result limiting
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### Low Priority
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1. **Advanced State Management**: Global stores for complex state
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2. **Custom Directives**: Create project-specific Alpine directives
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3. **Performance Profiling**: Detailed memory and performance analysis
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