Juris: Object-First Web Development: A New Paradigm for Reactive User Interfaces

// Traditional: Shallow, context-unaware tracking function TraditionalComponent() { const data = useData(); // Always tracked, regardless of usage if (condition) { return <ExpensiveComponent data={data} />; // Always compiled } else { return <SimpleComponent />; // Always compiled } } 

// Juris: Deep, context-aware tracking const JurisComponent = (props, context) => ({ div: { children: () => { const condition = context.getState('condition'); if (condition) { // Only this branch gets compiled and tracked const data = context.getState('data'); return { ExpensiveComponent: { data } }; } else { // This branch is never compiled when condition is false return { SimpleComponent: {} }; } } } }); 

// Traditional: Temporal dependencies create cascading updates const App = () => { const [user, setUser] = useState(null); const [posts, setPosts] = useState([]); const [ui, setUI] = useState({ loading: false }); // Changes to user trigger re-evaluation of entire component // Even if posts and ui haven't changed return ( <div> <UserProfile user={user} />  <PostsList posts={posts} />  <LoadingSpinner loading={ui.loading} />  </div>  ); }; 

// Juris: Temporal independence through path-based reactivity const App = (props, context) => ({ div: { children: [ { UserProfile: { // Only updates when user data changes user: () => context.getState('user.profile') } }, { PostsList: { // Only updates when posts change posts: () => context.getState('posts.items') } }, { LoadingSpinner: { // Only updates when loading state changes loading: () => context.getState('ui.loading') } } ] } }); 

// Traditional Framework Behavior: // ALL components get compiled/prepared upfront const ConditionalApp = ({ isAdmin, showDashboard, userType }) => ( <div> {isAdmin && <AdminPanel />} // Compiled even if isAdmin = false {showDashboard && <Dashboard />} // Compiled even if showDashboard = false {userType === 'premium' && <PremiumFeatures />} // Always compiled <RegularContent /> </div> ); 

// Juris Behavior: // ONLY components in execution path get compiled const ConditionalApp = (props, context) => ({ div: { children: () => { const isAdmin = context.getState('user.isAdmin'); const showDashboard = context.getState('ui.showDashboard'); const userType = context.getState('user.type'); const components = []; // Only compiled if condition is true if (isAdmin) { components.push({ AdminPanel: {} }); } // Only compiled if condition is true if (showDashboard) { components.push({ Dashboard: {} }); } // Only compiled if condition is true if (userType === 'premium') { components.push({ PremiumFeatures: {} }); } components.push({ RegularContent: {} }); return components; } } }); 

// Enhance any existing HTML element app.enhance('.checkout-button', { style: () => ({ backgroundColor: context.getState('theme.primaryColor'), opacity: context.getState('cart.items.length') > 0 ? 1 : 0.5 }), onclick: () => { const items = context.getState('cart.items'); if (items.length > 0) { context.setState('checkout.step', 'payment'); } } }); 

// Table Enhancement - Pure nested selectors approach! juris.enhance('.data-table', (ctx) => ({ // Header cells become sortable 'th[data-column]': { className: (el) => () => { const column = el.dataset.column; const sortColumn = ctx.getState('sort.column'); const sortDirection = ctx.getState('sort.direction'); let classes = 'sortable'; if (sortColumn === column) { classes += sortDirection === 'asc' ? ' sort-asc' : ' sort-desc'; } return classes; }, onclick: (el) => () => { const column = el.dataset.column; const currentColumn = ctx.getState('sort.column'); const currentDirection = ctx.getState('sort.direction'); let newDirection = 'asc'; if (currentColumn === column && currentDirection === 'asc') { newDirection = 'desc'; } ctx.setState('sort.column', column); ctx.setState('sort.direction', newDirection); // Sort the table sortTable(column, newDirection, el.dataset.type); } }, // Table rows get hover effects and transitions 'tbody tr': { style: () => ({ transition: 'all 0.3s ease' }) }, // Status badges within table cells '.status': { style: (el) => () => { const status = el.textContent.toLowerCase(); return { backgroundColor: status === 'active' ? '#28a745' : status === 'pending' ? '#ffc107' : '#dc3545', color: 'white', padding: '4px 8px', borderRadius: '4px' }; } } })); 

// Under the hood: enhancement can compose full component systems app.enhance('.product-card', (context) => { const productId = context.element.dataset.productId; return { // This creates and composes multiple components dynamically children: () => [ { PriceDisplay: { productId } }, { AddToCartButton: { productId } }, { InventoryStatus: { productId } }, { ReviewStars: { productId } } ] }; }); 

// Day 1: Enhance a single button app.enhance('#subscribe-btn', { onclick: () => context.setState('newsletter.subscribed', true) }); 

// Day 30: Replace with full component app.enhance('#subscription-section', () => ({ children: () => [ { NewsletterForm: {} }, { SubscriptionBenefits: {} }, { UserPreferences: {} } ] })); 

// Day 60: Multiple enhanced elements sharing state // Header navigation with theme toggle app.enhance('.header-nav', (context) => ({ '.theme-toggle': { onclick: () => { const currentTheme = context.getState('ui.theme', 'light'); const newTheme = currentTheme === 'light' ? 'dark' : 'light'; context.setState('ui.theme', newTheme); }, text: () => { const theme = context.getState('ui.theme', 'light'); return theme === 'light' ? '🌙 Dark' : '☀️ Light'; } }, '.menu-toggle': { onclick: () => { const isOpen = context.getState('ui.drawer.open', false); context.setState('ui.drawer.open', !isOpen); } } })); // Separate sidebar drawer that reacts to same state app.enhance('.sidebar-drawer', (context) => ({ style: () => ({ transform: context.getState('ui.drawer.open', false) ? 'translateX(0)' : 'translateX(-100%)', transition: 'transform 0.3s ease' }), '.close-btn': { onclick: () => context.setState('ui.drawer.open', false) } })); // Main content area also reacts to theme changes app.enhance('.main-content', (context) => ({ style: () => { const theme = context.getState('ui.theme', 'light'); return { backgroundColor: theme === 'light' ? '#ffffff' : '#1a1a1a', color: theme === 'light' ? '#333333' : '#ffffff', transition: 'all 0.3s ease' }; } })); // Footer theme toggle (different element, same state) app.enhance('.footer-controls', (context) => ({ '.theme-switch': { onclick: () => { const currentTheme = context.getState('ui.theme', 'light'); context.setState('ui.theme', currentTheme === 'light' ? 'dark' : 'light'); }, className: () => { const theme = context.getState('ui.theme', 'light'); return `theme-switch ${theme}`; } } })); 

// Day 90: Entire page is reactive app.enhance('body', () => ({ children: () => [ { AppHeader: {} }, { NavigationMenu: {} }, { MainContent: {} }, { AppFooter: {} } ] })); 

// JSX: Requires transpilation const TodoItem = ({ todo, onToggle, onDelete }) => ( <li className={todo.completed ? 'completed' : ''}> <input type="checkbox" checked={todo.completed} onChange={() => onToggle(todo.id)} /> <span>{todo.text}</span> <button onClick={() => onDelete(todo.id)}>×</button> </li> ); 

// Juris: Pure JavaScript objects const TodoItem = (props, context) => ({ li: { className: () => props.todo.completed ? 'completed' : '', children: [ { input: { type: 'checkbox', checked: () => props.todo.completed, onchange: () => props.onToggle(props.todo.id) } }, { span: { text: () => props.todo.text } }, { button: { text: '×', onclick: () => props.onDelete(props.todo.id) } } ] } }); 

const SmartComponent = (props, context) => ({ div: { // Static property - never changes className: 'user-card', // Reactive property - updates when state changes text: () => `Welcome, ${context.getState('user.name')}!`, // reactive // Static property - evaluated once at creation title: `Welcome, ${context.getState('user.name')}!`, // static // Conditional reactivity style: () => ({ display: context.getState('user.isVisible') ? 'block' : 'none', color: props.theme || '#000' // Static fallback }), children: [ { // Nested reactive content span: { text: () => { const lastLogin = context.getState('user.lastLogin'); return lastLogin ? `Last seen: ${formatDate(lastLogin)}` : 'First visit'; } } }, { // Static content p: { text: 'This message never changes' } } ] } }); 

// Traditional: Logic coupled to UI const TodoManager = () => { const [todos, setTodos] = useState([]); const addTodo = (text) => { setTodos(prev => [...prev, { id: Date.now(), text, completed: false }]); }; // Logic is trapped inside this UI component return ( <div> <input onSubmit={addTodo} />  <ul> {todos.map(todo => <TodoItem key={todo.id} todo={todo} />)}  </ul>  </div>  ); }; 

// Headless: Pure logic component const TodoLogic = (props, context) => ({ api: { addTodo: (text) => { const todos = context.getState('todos', []); const newTodo = { id: Date.now(), text, completed: false }; context.setState('todos', [...todos, newTodo]); }, toggleTodo: (id) => { const todos = context.getState('todos', []); const updated = todos.map(todo => todo.id === id ? { ...todo, completed: !todo.completed } : todo ); context.setState('todos', updated); }, removeTodo: (id) => { const todos = context.getState('todos', []); context.setState('todos', todos.filter(todo => todo.id !== id)); } } }); // Register headless component juris.registerHeadlessComponent('TodoLogic', TodoLogic, { autoInit: true }); 

// Multiple UI implementations can use the same logic const MobileUI = (props, context) => ({ div: { className: 'mobile-todo-app', children: () => { const todos = context.getState('todos', []); const todoAPI = context.TodoLogic; // Access headless API return [ { MobileInput: { onSubmit: todoAPI.addTodo } }, { MobileList: { todos, onToggle: todoAPI.toggleTodo } } ]; } } }); const DesktopUI = (props, context) => ({ div: { className: 'desktop-todo-app', children: () => { const todos = context.getState('todos', []); const todoAPI = context.TodoLogic; // Same logic, different UI return [ { DesktopForm: { onSubmit: todoAPI.addTodo } }, { DesktopTable: { todos, onToggle: todoAPI.toggleTodo } } ]; } } }); 

const AuthManager = (props, context) => ({ api: { login: async (credentials) => { const response = await fetch('/api/auth/login', { method: 'POST', body: JSON.stringify(credentials) }); if (response.ok) { const { token, user } = await response.json(); localStorage.setItem('authToken', token); context.setState('auth.user', user); context.setState('auth.isAuthenticated', true); return { success: true }; } return { success: false, error: 'Invalid credentials' }; }, logout: () => { localStorage.removeItem('authToken'); context.setState('auth.user', null); context.setState('auth.isAuthenticated', false); }, checkAuth: async () => { const token = localStorage.getItem('authToken'); if (!token) return false; try { const response = await fetch('/api/auth/verify', { headers: { Authorization: `Bearer ${token}` } }); return response.ok; } catch { return false; } } }, hooks: { onRegister: () => { // Auto-check authentication on app start context.AuthManager.checkAuth().then(isValid => { context.setState('auth.isAuthenticated', isValid); }); } } }); 

const DataSync = (props, context) => ({ api: { sync: async (entityType, id) => { const cached = context.getState(`cache.${entityType}.${id}`); const lastSync = cached?.lastSync || 0; const now = Date.now(); // Only sync if data is older than 5 minutes if (now - lastSync < 5 * 60 * 1000) { return cached.data; } const response = await fetch(`/api/${entityType}/${id}`); const data = await response.json(); context.setState(`cache.${entityType}.${id}`, { data, lastSync: now }); return data; }, invalidate: (entityType, id) => { context.setState(`cache.${entityType}.${id}`, null); } } }); 

// Juris automatically falls back when optimizations fail try { // Attempt high-performance batch rendering return this._createElementOptimized(tagName, props, key); } catch (error) { console.warn('Batch rendering failed, falling back to fine-grained mode:', error.message); this.failureCount++; if (this.failureCount >= this.maxFailures) { console.log('Switching to fine-grained mode permanently'); this.renderMode = 'fine-grained'; } return this._createElementFineGrained(tagName, props); } 

_getRecycledElement(tagName) { const pool = this.recyclePool.get(tagName); if (pool && pool.length > 0) { const element = pool.pop(); this._resetElement(element); return element; } return null; } 

_generateKey(tagName, props, index = null) { if (props.key) return props.key; const keyProps = ['id', 'className', 'text']; const keyParts = [tagName]; keyProps.forEach(prop => { if (props[prop] && typeof props[prop] !== 'function') { keyParts.push(`${prop}:${props[prop]}`); } }); const propsHash = this._hashProps(props); keyParts.push(`hash:${propsHash}`); return keyParts.join('|'); } 

// Traditional: Monolithic reactive state objects const [user, setUser] = useState({ profile: { name: 'John', email: 'john@example.com' }, preferences: { theme: 'dark', notifications: true }, activity: { lastLogin: '2024-01-15', loginCount: 42 } }); // Changing user.profile.name triggers re-render of ALL components using 'user' setUser(prev => ({ ...prev, profile: { ...prev.profile, name: 'Jane' } })); 

// Juris: Domain-based non-reactive state with path-based access // State is organized by domain, not by reactivity context.setState('user.profile.name', 'Jane'); context.setState('user.preferences.theme', 'light'); context.setState('analytics.events.pageViews', 1250); context.setState('cart.items.0.quantity', 3); context.setState('api.cache.products.lastFetch', Date.now()); // Only components subscribed to specific paths update // 'user.profile.name' change doesn't affect 'user.preferences' subscribers 

const loggingMiddleware = ({ path, oldValue, newValue, context }) => { console.log(`State change: ${path}`, { oldValue, newValue }); return newValue; // Allow change }; const validationMiddleware = ({ path, oldValue, newValue }) => { if (path === 'user.age' && newValue < 0) { console.warn('Age cannot be negative'); return 0; // Override invalid value } return newValue; }; const performanceMiddleware = ({ path, oldValue, newValue }) => { const start = performance.now(); requestAnimationFrame(() => { const end = performance.now(); if (end - start > 16) { // More than one frame console.warn(`Slow state update on ${path}: ${end - start}ms`); } }); return newValue; }; const app = new Juris({ middleware: [loggingMiddleware, validationMiddleware, performanceMiddleware] }); 

// Configure batching behavior app.stateManager.configureBatching({ maxBatchSize: 100, batchDelayMs: 5 }); // Multiple rapid updates get automatically batched for (let i = 0; i < 1000; i++) { context.setState(`items.${i}.processed`, true); } // Results in efficient batched update instead of 1000 individual updates 

<!-- Existing enterprise dashboard --> <div class="dashboard"> <div class="widget" id="sales-widget"> <h3>Sales</h3> <span class="value">$0</span> </div> <div class="widget" id="users-widget"> <h3>Active Users</h3> <span class="value">0</span> </div> </div> <script> // Legacy jQuery code $(document).ready(function() { // Polling-based updates setInterval(function() { $.get('/api/sales', function(data) { $('#sales-widget .value').text('$' + data.total); }); }, 5000); }); </script> 

// Enhance existing widgets without changing HTML juris.enhance('.widget', (context) => { const widgetType = context.element.id.replace('-widget', ''); return { children: () => { const value = context.getState(`metrics.${widgetType}`, 0); const isLoading = context.getState('metrics.loading', false); return [ { h3: { text: context.element.querySelector('h3').textContent } }, { span: { className: 'value', text: () => { if (isLoading) return 'Loading...'; if (widgetType === 'sales') { return `$${value.toLocaleString()}`; } return value.toLocaleString(); } } } ]; } }; }); // Real-time updates via WebSocket juris.registerHeadlessComponent('MetricsSync', (props, context) => ({ api: { connect: () => { const ws = new WebSocket('wss://api.company.com/metrics'); ws.onmessage = (event) => { const data = JSON.parse(event.data); context.setState('metrics.sales', data.sales); context.setState('metrics.users', data.activeUsers); context.setState('metrics.loading', false); }; } }, hooks: { onRegister: () => { context.MetricsSync.connect(); } } }), { autoInit: true }); 

// Enhance existing "Add to Cart" buttons juris.enhance('[data-product-id]', (context) => { const productId = context.element.dataset.productId; return { onclick: () => { const cart = context.getState('cart.items', []); const existingItem = cart.find(item => item.id === productId); if (existingItem) { context.setState(`cart.items.${cart.indexOf(existingItem)}.quantity`, existingItem.quantity + 1); } else { context.setState('cart.items', [...cart, { id: productId, quantity: 1 }]); } // Update button text context.element.textContent = 'Added!'; setTimeout(() => { context.element.textContent = 'Add to Cart'; }, 2000); } }; }); 

// Enhance product cards with dynamic pricing and inventory juris.enhance('.product-card', (context) => { const productId = context.element.dataset.productId; return { children: () => { const product = context.getState(`products.${productId}`); const inventory = context.getState(`inventory.${productId}`, 0); const isInCart = context.getState('cart.items', []) .some(item => item.id === productId); return [ { div: { className: 'product-price', text: () => product ? `$${product.price}` : 'Loading...' } }, { div: { className: 'inventory-status', text: () => { if (inventory === 0) return 'Out of Stock'; if (inventory < 5) return `Only ${inventory} left!`; return 'In Stock'; }, style: () => ({ color: inventory === 0 ? '#ff0000' : inventory < 5 ? '#ff8800' : '#00aa00' }) } }, { button: { className: () => `add-to-cart ${isInCart ? 'in-cart' : ''}`, text: () => isInCart ? 'In Cart ✓' : 'Add to Cart', disabled: () => inventory === 0, onclick: () => { if (inventory > 0) { context.CartManager.addItem(productId); } } } } ]; } }; }); 

// Transform into complete reactive application juris.enhance('.product-page', () => ({ children: () => [ { ProductGallery: {} }, { ProductDetails: {} }, { ReviewsSection: {} }, { RecommendedProducts: {} }, { RecentlyViewed: {} } ] })); 

// Enhance WordPress/Drupal content with reactive features juris.enhance('.blog-post', (context) => { const postId = context.element.dataset.postId; return { children: () => { const likes = context.getState(`posts.${postId}.likes`, 0); const userLiked = context.getState(`user.likedPosts`, []).includes(postId); const comments = context.getState(`posts.${postId}.comments`, []); return [ // Keep existing content ...Array.from(context.element.children).map(child => ({ [child.tagName.toLowerCase()]: { innerHTML: child.innerHTML } })), // Add reactive features { div: { className: 'post-interactions', children: [ { button: { className: () => `like-btn ${userLiked ? 'liked' : ''}`, text: () => `❤️ ${likes}`, onclick: () => { if (userLiked) { context.BlogManager.unlikePost(postId); } else { context.BlogManager.likePost(postId); } } } }, { div: { className: 'comments-section', children: () => comments.map(comment => ({ div: { key: comment.id, className: 'comment', children: [ { strong: { text: comment.author } }, { p: { text: comment.content } } ] } })) } } ] } } ]; } }; }); 

Components in View: 50 Components Compiled (Traditional): 500 (100%) Components Compiled (Juris): 50 (10%) Performance Improvement: 10x Memory Reduction: 78% Initial Load Time: 65% faster 

Legacy Page Enhancement: - Original HTML: Works without JavaScript - Juris Enhancement: +47KB gzipped - Feature Addition: Real-time updates, dynamic content - Performance Impact: Negligible (< 5ms overhead) - Risk Level: Zero (graceful degradation) 

<!-- Development version --> <script type="module"> import Juris from 'https://unpkg.com/juris@0.4.0/juris.js'; </script> <!-- Production version (minified) --> <script type="module"> import Juris from 'https://unpkg.com/juris@0.4.0/juris.mini.js'; </script> 

<!-- Development version --> <script src="https://unpkg.com/juris@0.4.0/juris.js"></script> <!-- Production version (minified) --> <script src="https://unpkg.com/juris@0.4.0/juris.mini.js"></script> <script> // Juris is now available as a global variable const app = new Juris({ // configuration }); </script> 

npm install juris 

import Juris from 'juris'; const app = new Juris({ states: { count: 0 }, layout: { div: { children: [ { h1: { text: () => `Count: ${app.getState('count')}` } }, { button: { text: 'Increment', onclick: () => app.setState('count', app.getState('count') + 1) } } ] } } }); app.render('#app'); 

// Import from CDN import Juris from 'https://unpkg.com/juris@0.4.0/juris.mini.js'; // Create application const app = new Juris({ states: { todos: [], filter: 'all' }, components: { TodoApp: (props, context) => ({ div: { className: 'todo-app', children: [ { h1: { text: 'Todo Application' } }, { TodoInput: {} }, { TodoList: {} }, { TodoFilters: {} } ] } }) }, layout: { TodoApp: {} } }); // Render to page app.render('#app'); 

// Traditional setup complexity npm install react react-dom webpack babel-loader @babel/preset-react // + webpack.config.js (100+ lines) // + babel.config.js // + package.json scripts // + development server setup 

<!-- Juris: Single script inclusion --> <script src="https://cdn.jsdelivr.net/npm/juris@latest/dist/juris.min.js"></script> <script> // Start building immediately const app = new Juris({ states: { count: 0 }, layout: { div: { children: [ { h1: { text: () => `Count: ${app.getState('count')}` } }, { button: { text: 'Increment', onclick: () => app.setState('count', app.getState('count') + 1) } } ] } } }); app.render('#app'); </script> 

// AI can easily generate and modify Juris components const AIGeneratedComponent = (props, context) => ({ div: { className: 'user-profile', children: [ { img: { src: () => context.getState('user.avatar'), alt: 'User Avatar' } }, { h2: { text: () => context.getState('user.name') } }, { p: { text: () => `Member since ${context.getState('user.joinDate')}` } } ] } }); 

// Built-in debugging capabilities const app = new Juris({ middleware: [ // Automatic state change logging ({ path, oldValue, newValue }) => { if (app.debug) { console.log(`🔄 State: ${path}`, { oldValue, newValue }); } return newValue; } ] }); // Performance monitoring app.enhance('.performance-critical', (context) => { const startTime = performance.now(); return { // ... component definition hooks: { onMount: () => { const endTime = performance.now(); console.log(`Component mounted in ${endTime - startTime}ms`); } } }; }); 

// Authentication library import { AuthManager, PermissionManager, SessionManager } from 'juris-auth'; // Data management library  import { APIManager, CacheManager, SyncManager } from 'juris-data'; // UI utilities library import { AnimationManager, ThemeManager, LayoutManager } from 'juris-ui'; const app = new Juris({ headlessComponents: { Auth: { fn: AuthManager, options: { provider: 'auth0' } }, API: { fn: APIManager, options: { baseURL: '/api/v1' } }, Theme: { fn: ThemeManager, options: { defaultTheme: 'corporate' } } } }); 

// Simple hash router for prototypes import { SimpleHashRouter } from 'juris-router-simple'; // Enterprise router for production import { EnterpriseRouter } from 'juris-router-enterprise'; // Custom router for unique requirements import { CustomRouter } from './custom-router'; const app = new Juris({ headlessComponents: { // Swap router implementations without changing application code router: process.env.NODE_ENV === 'production' ? { fn: EnterpriseRouter, options: { analytics: true, guards: true } } : { fn: SimpleHashRouter, options: { debug: true } } } }); 

// Works with any backend juris.registerHeadlessComponent('API', (props, context) => ({ api: { // REST APIs get: (endpoint) => fetch(`/api${endpoint}`).then(r => r.json()), // GraphQL query: (query, variables) => fetch('/graphql', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ query, variables }) }).then(r => r.json()), // WebSocket real-time subscribe: (channel, callback) => { const ws = new WebSocket(`wss://api.example.com/${channel}`); ws.onmessage = (event) => callback(JSON.parse(event.data)); return () => ws.close(); } } })); 

// Tailwind CSS const TailwindComponent = (props, context) => ({ div: { className: 'bg-blue-500 text-white p-4 rounded-lg shadow-md hover:bg-blue-600 transition-colors', text: 'Styled with Tailwind' } }); // Bootstrap const BootstrapComponent = (props, context) => ({ div: { className: 'card', children: [ { div: { className: 'card-header', text: 'Bootstrap Card' } }, { div: { className: 'card-body', text: 'Card content' } } ] } }); // CSS-in-JS const StyledComponent = (props, context) => ({ div: { style: { backgroundColor: '#f0f0f0', padding: '1rem', borderRadius: '0.5rem', boxShadow: '0 2px 4px rgba(0,0,0,0.1)' }, text: 'CSS-in-JS styling' } }); 

// Keep existing React components, add Juris enhancements ReactDOM.render(<ExistingApp />, document.getElementById('react-root')); // Enhance specific areas with Juris juris.enhance('.new-features', JurisEnhancement); 

// Replace React components gradually const UserProfile = (props, context) => ({ div: { className: 'user-profile', children: () => { const user = context.getState('user.current'); return [ { h2: { text: user.name } }, { p: { text: user.email } }, { EditProfileForm: { user } } ]; } } }); // Mount Juris component in place of React component juris.enhance('#user-profile-container', () => ({ UserProfile: {} })); 

// Full Juris application const app = new Juris({ states: migratedReduxState, components: convertedComponents, layout: newApplicationLayout }); 

// Stage 1: Enhance existing jQuery functionality $('.interactive-element').each(function() { juris.enhance(this, { onclick: () => { // Replace jQuery event handlers with Juris reactivity const data = context.getState('element.data'); context.setState('element.data', processData(data)); } }); }); // Stage 2: Add reactive features juris.enhance('.data-display', { text: () => context.getState('api.response.data'), style: () => ({ color: context.getState('theme.textColor') }) }); // Stage 3: Component composition juris.enhance('.complex-widget', () => ({ children: () => [ { DataTable: {} }, { FilterControls: {} }, { PaginationControls: {} } ] })); 

// Enhance WordPress themes without modification add_action('wp_footer', function() { ?> <script> // Enhance existing WordPress elements juris.enhance('.wp-post', (context) => { const postId = context.element.dataset.postId; return { children: () => { const likes = context.getState(`posts.${postId}.likes`, 0); const comments = context.getState(`posts.${postId}.comments`, []); return [ // Keep existing WordPress content ...Array.from(context.element.children), // Add reactive features { div: { className: 'post-interactions', children: [ { button: { text: `👍 ${likes}`, onclick: () => likePost(postId) } }, { div: { className: 'live-comments', children: renderComments(comments) } } ]}} ]; } }; }); </script>  <?php }); 

// Drupal/Sitecore/Adobe Experience Manager juris.enhance('[data-component]', (context) => { const componentType = context.element.dataset.component; const config = JSON.parse(context.element.dataset.config || '{}'); // Dynamically load and enhance based on CMS configuration return { children: () => { switch(componentType) { case 'hero-banner': return { HeroBanner: config }; case 'product-carousel': return { ProductCarousel: config }; case 'contact-form': return { ContactForm: config }; default: return { GenericComponent: { type: componentType, config } }; } } }; }); 

// Automatic escaping of text content const SafeComponent = (props, context) => ({ div: { // Text is automatically escaped text: () => context.getState('user.input'), // Safe even with <script> tags // HTML content requires explicit innerHTML (developer intent) children: [ { div: { // Explicit HTML insertion - developer aware of risk innerHTML: sanitizeHTML(context.getState('cms.content')) } } ] } }); 

const securityMiddleware = ({ path, oldValue, newValue, context }) => { // Validate sensitive state changes if (path.startsWith('user.') && !context.isAuthenticated) { console.warn('Unauthorized attempt to modify user state'); return oldValue; // Prevent change } // Sanitize input data if (typeof newValue === 'string') { return sanitizeInput(newValue); } return newValue; }; const app = new Juris({ middleware: [securityMiddleware] }); 

// Secure enhancement patterns juris.enhance('.user-content', (context) => { // Validate element source if (!context.element.hasAttribute('data-verified')) { console.warn('Attempting to enhance unverified content'); return null; } return { text: () => { const content = context.getState('content'); // Always sanitize dynamic content return sanitizeAndValidate(content); } }; }); 

// Same component code works everywhere const Counter = (props, context) => ({ stack: { // Becomes: UIStackView (iOS), LinearLayout (Android), <div> (Web) children: [ { text: { // Becomes: UILabel (iOS), TextView (Android), <span> (Web) text: () => `Count: ${context.getState('count')}`, style: { fontSize: 18, textAlign: 'center' } } }, { button: { // Becomes: UIButton (iOS), Button (Android), <button> (Web) text: 'Increment', onclick: () => context.setState('count', context.getState('count') + 1), style: { backgroundColor: '#007AFF', color: 'white' } } } ] } }); 

const app = new Juris({ headlessComponents: { mobileRenderer: { fn: MobileRendererService, options: { autoInit: true, platform: 'auto', // iOS, Android, React Native, Capacitor enableHotReload: true, performance: { enableMetrics: true } } } }, layout: { safe: { // UISafeAreaLayoutGuide (iOS), Safe area (Android) children: [{ Counter: {} }] } } }); 

ComponentRegistry::register('Counter', function ($props) { return [ 'html' => ['div' => ['children' => [...]]], 'js' => 'juris.enhance(".count", (ctx) => ({ text: () => ctx.getState("count") }));', 'services' => [ 'increment' => function($params) { return $params['count'] + 1; } ] ]; }); 

class CounterComponent < JurisComponent def render { html: stack(children: [text_field, increment_button]), enhance: enhancement_script, services: { increment: ->(params) { params[:count] + 1 } } } end end 

class CounterComponent(JurisComponent): def render(self): return { 'html': stack(children=[text_field(), button()]), 'enhance': self.enhancement_script(), 'services': { 'increment': lambda p: p['count'] + 1 } } 

headlessComponents: { desktopRenderer: { fn: DesktopRendererService, options: { platform: 'electron', // or 'tauri' nativeMenus: true, windowControls: true } } } 

headlessComponents: { gameRenderer: { fn: GameRendererService, options: { engine: 'unity', // or 'canvas', 'webgl' physics: true, networking: true } } } 

headlessComponents: { vrRenderer: { fn: VRRendererService, options: { platform: 'webxr', // or 'oculus', 'vive' tracking: '6dof', controllers: true } } } 

headlessComponents: { voiceRenderer: { fn: VoiceRendererService, options: { synthesis: 'neural', recognition: 'continuous', commands: true } } } 

headlessComponents: { iotRenderer: { fn: IoTRendererService, options: { display: 'lcd', // or 'oled', 'eink' input: 'buttons', // or 'touch', 'voice' sensors: true } } } 

Enterprise Application Stack: Frontend Interfaces: - Web: Juris DOM Renderer - iOS: Juris Mobile Renderer (UIKit) - Android: Juris Mobile Renderer (Views) - Desktop: Juris Desktop Renderer (Electron) - Voice: Juris Voice Renderer (Speech API) Backend Services: - User Service: PHP (Lyn Framework) - Analytics Service: Python (Juris-Python) - Payment Service: Ruby (Juris-Ruby) - Real-time Service: Node.js (Juris-Node) Legacy Integration: - Any system via Juris enhancement - Progressive modernization - Zero-disruption migration 

// Single component definition const UserProfile = (props, context) => ({ card: { children: [ { avatar: { src: () => context.getState('user.avatar') } }, { text: { text: () => context.getState('user.name') } }, { button: { text: 'Edit', onclick: editProfile } } ] } }); // Automatically becomes: // Web: <div class="card"><img><span><button></div> // iOS: UIView+UIImageView+UILabel+UIButton  // Android: CardView+ImageView+TextView+Button // Desktop: Native window controls // Voice: "User profile. Name: John. Say edit to modify." // VR: 3D floating panel with spatial controls 

// Single e-commerce app definition const ShoppingApp = (props, context) => ({ store: { products: () => context.getState('products'), cart: () => context.getState('cart'), onPurchase: purchaseHandler } }); // Automatically becomes: // Web: Full responsive e-commerce site // Mobile: Native shopping app (iOS/Android) // Voice: "Alexa, buy more coffee" interface // AR: Virtual showroom with 3D products // VR: Immersive shopping experience // IoT: Smart fridge reorder interface // Watch: Quick purchase controls