Complete Application Examples

Learn by building! These complete application examples show you how to build real-world apps with Cocobase.

Todo Application

A simple yet complete todo app with authentication, CRUD operations, and real-time sync.

Features

User authentication
Create, read, update, delete todos
Mark todos as complete
Real-time sync across devices
Filter by status

JavaScript/React
Flutter
Python

// lib/cocobase.ts
import { Cocobase } from "cocobase";

export const db = new Cocobase({
  apiKey: process.env.NEXT_PUBLIC_COCOBASE_API_KEY!,
});

// types/todo.ts
export interface Todo {
  id: string;
  title: string;
  completed: boolean;
  userId: string;
  createdAt: string;
}

// hooks/useTodos.ts
import { useState, useEffect } from 'react';
import { db } from '@/lib/cocobase';
import type { Todo } from '@/types/todo';

export function useTodos() {
  const [todos, setTodos] = useState<Todo[]>([]);
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    loadTodos();

    // Real-time subscription
    const unsubscribe = db.watch('todos', (event) => {
      if (event.type === 'create') {
        setTodos(prev => [...prev, event.data as Todo]);
      } else if (event.type === 'update') {
        setTodos(prev => prev.map(t =>
          t.id === event.data.id ? event.data as Todo : t
        ));
      } else if (event.type === 'delete') {
        setTodos(prev => prev.filter(t => t.id !== event.documentId));
      }
    });

    return () => unsubscribe();
  }, []);

  const loadTodos = async () => {
    try {
      const data = await db.listDocuments<Todo>('todos', {
        sort: { createdAt: -1 }
      });
      setTodos(data);
    } finally {
      setLoading(false);
    }
  };

  const addTodo = async (title: string) => {
    const todo = await db.createDocument<Todo>('todos', {
      title,
      completed: false,
      userId: db.auth.getCurrentUser()?.id,
    });
    return todo;
  };

  const toggleTodo = async (id: string, completed: boolean) => {
    await db.updateDocument('todos', id, { completed });
  };

  const deleteTodo = async (id: string) => {
    await db.deleteDocument('todos', id);
  };

  return { todos, loading, addTodo, toggleTodo, deleteTodo };
}

// components/TodoList.tsx
import { useTodos } from '@/hooks/useTodos';

export function TodoList() {
  const { todos, loading, addTodo, toggleTodo, deleteTodo } = useTodos();
  const [newTodo, setNewTodo] = useState('');

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    if (!newTodo.trim()) return;
    await addTodo(newTodo);
    setNewTodo('');
  };

  if (loading) return <div>Loading...</div>;

  return (
    <div>
      <form onSubmit={handleSubmit}>
        <input
          value={newTodo}
          onChange={(e) => setNewTodo(e.target.value)}
          placeholder="What needs to be done?"
        />
        <button type="submit">Add</button>
      </form>

      <ul>
        {todos.map(todo => (
          <li key={todo.id}>
            <input
              type="checkbox"
              checked={todo.completed}
              onChange={(e) => toggleTodo(todo.id, e.target.checked)}
            />
            <span style={{
              textDecoration: todo.completed ? 'line-through' : 'none'
            }}>
              {todo.title}
            </span>
            <button onClick={() => deleteTodo(todo.id)}>Delete</button>
          </li>
        ))}
      </ul>
    </div>
  );
}

// models/todo.dart
class Todo {
  final String id;
  final String title;
  final bool completed;
  final String userId;
  final DateTime createdAt;

  Todo({
    required this.id,
    required this.title,
    required this.completed,
    required this.userId,
    required this.createdAt,
  });

  factory Todo.fromJson(Map<String, dynamic> json) {
    return Todo(
      id: json['id'],
      title: json['title'],
      completed: json['completed'],
      userId: json['userId'],
      createdAt: DateTime.parse(json['createdAt']),
    );
  }

  Map<String, dynamic> toJson() {
    return {
      'title': title,
      'completed': completed,
      'userId': userId,
    };
  }
}

// providers/todo_provider.dart
import 'package:flutter/foundation.dart';
import 'package:coco_base_flutter/coco_base_flutter.dart';

class TodoProvider with ChangeNotifier {
  final Cocobase _db;
  List<Todo> _todos = [];
  bool _loading = true;
  StreamSubscription? _subscription;

  TodoProvider(this._db) {
    _loadTodos();
    _subscribeToChanges();
  }

  List<Todo> get todos => _todos;
  bool get loading => _loading;

  Future<void> _loadTodos() async {
    try {
      final data = await _db.listDocuments('todos',
        sort: {'-createdAt': 1}
      );
      _todos = data.map((json) => Todo.fromJson(json)).toList();
    } finally {
      _loading = false;
      notifyListeners();
    }
  }

  void _subscribeToChanges() {
    _subscription = _db.watch('todos').listen((event) {
      if (event.type == 'create') {
        _todos.add(Todo.fromJson(event.data));
      } else if (event.type == 'update') {
        final index = _todos.indexWhere((t) => t.id == event.data['id']);
        if (index != -1) {
          _todos[index] = Todo.fromJson(event.data);
        }
      } else if (event.type == 'delete') {
        _todos.removeWhere((t) => t.id == event.documentId);
      }
      notifyListeners();
    });
  }

  Future<void> addTodo(String title) async {
    await _db.createDocument('todos', {
      'title': title,
      'completed': false,
      'userId': (await _db.getCurrentUser())?['id'],
    });
  }

  Future<void> toggleTodo(String id, bool completed) async {
    await _db.updateDocument('todos', id, {'completed': completed});
  }

  Future<void> deleteTodo(String id) async {
    await _db.deleteDocument('todos', id);
  }

  @override
  void dispose() {
    _subscription?.cancel();
    super.dispose();
  }
}

// screens/todo_screen.dart
class TodoScreen extends StatelessWidget {
  final _controller = TextEditingController();

  @override
  Widget build(BuildContext context) {
    return Consumer<TodoProvider>(
      builder: (context, provider, _) {
        if (provider.loading) {
          return Center(child: CircularProgressIndicator());
        }

        return Column(
          children: [
            TextField(
              controller: _controller,
              decoration: InputDecoration(
                hintText: 'What needs to be done?',
              ),
              onSubmitted: (value) async {
                if (value.isNotEmpty) {
                  await provider.addTodo(value);
                  _controller.clear();
                }
              },
            ),
            Expanded(
              child: ListView.builder(
                itemCount: provider.todos.length,
                itemBuilder: (context, index) {
                  final todo = provider.todos[index];
                  return ListTile(
                    leading: Checkbox(
                      value: todo.completed,
                      onChanged: (value) {
                        provider.toggleTodo(todo.id, value ?? false);
                      },
                    ),
                    title: Text(
                      todo.title,
                      style: TextStyle(
                        decoration: todo.completed
                          ? TextDecoration.lineThrough
                          : null,
                      ),
                    ),
                    trailing: IconButton(
                      icon: Icon(Icons.delete),
                      onPressed: () => provider.deleteTodo(todo.id),
                    ),
                  );
                },
              ),
            ),
          ],
        );
      },
    );
  }
}

# app.py - Flask example
from flask import Flask, render_template, request, jsonify
from cocobase import Cocobase
import os

app = Flask(__name__)
db = Cocobase(api_key=os.getenv('COCOBASE_API_KEY'))

@app.route('/api/todos', methods=['GET'])
def get_todos():
    todos = db.list_documents('todos', sort={'-createdAt': 1})
    return jsonify(todos)

@app.route('/api/todos', methods=['POST'])
def create_todo():
    data = request.json
    todo = db.create_document('todos', {
        'title': data['title'],
        'completed': False,
        'userId': data['userId']
    })
    return jsonify(todo)

@app.route('/api/todos/<todo_id>', methods=['PATCH'])
def update_todo(todo_id):
    data = request.json
    todo = db.update_document('todos', todo_id, data)
    return jsonify(todo)

@app.route('/api/todos/<todo_id>', methods=['DELETE'])
def delete_todo(todo_id):
    db.delete_document('todos', todo_id)
    return jsonify({'success': True})

# static/app.js - Frontend
class TodoApp {
  constructor() {
    this.todos = [];
    this.loadTodos();
    this.setupRealtime();
  }

  async loadTodos() {
    const response = await fetch('/api/todos');
    this.todos = await response.json();
    this.render();
  }

  async addTodo(title) {
    await fetch('/api/todos', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ title, userId: 'current_user' })
    });
  }

  async toggleTodo(id, completed) {
    await fetch(`/api/todos/${id}`, {
      method: 'PATCH',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ completed })
    });
  }

  async deleteTodo(id) {
    await fetch(`/api/todos/${id}`, { method: 'DELETE' });
  }

  render() {
    // Render todo list to DOM
  }
}

E-Commerce Application

A complete e-commerce app with products, cart, and checkout.

Features

Product catalog with search
Shopping cart
User orders
Inventory management
Real-time stock updates

JavaScript/Next.js
Flutter

// types/product.ts
export interface Product {
  id: string;
  name: string;
  description: string;
  price: number;
  stock: number;
  category: string;
  images: string[];
}

export interface CartItem {
  productId: string;
  quantity: number;
  product?: Product;
}

export interface Order {
  id: string;
  userId: string;
  items: CartItem[];
  total: number;
  status: 'pending' | 'processing' | 'shipped' | 'delivered';
  createdAt: string;
}

// hooks/useProducts.ts
export function useProducts(category?: string) {
  const [products, setProducts] = useState<Product[]>([]);

  useEffect(() => {
    loadProducts();
  }, [category]);

  const loadProducts = async () => {
    const filters = category ? { category: { $eq: category } } : {};
    const data = await db.listDocuments<Product>('products', {
      filters,
      sort: { createdAt: -1 }
    });
    setProducts(data);
  };

  const searchProducts = async (query: string) => {
    const data = await db.listDocuments<Product>('products', {
      filters: {
        name: { $contains: query }
      }
    });
    setProducts(data);
  };

  return { products, searchProducts };
}

// hooks/useCart.ts
export function useCart() {
  const [cart, setCart] = useState<CartItem[]>([]);

  const addToCart = async (productId: string, quantity: number = 1) => {
    const existing = cart.find(item => item.productId === productId);

    if (existing) {
      setCart(cart.map(item =>
        item.productId === productId
          ? { ...item, quantity: item.quantity + quantity }
          : item
      ));
    } else {
      setCart([...cart, { productId, quantity }]);
    }

    // Save to database
    await db.createDocument('cart_items', {
      userId: db.auth.getCurrentUser()?.id,
      productId,
      quantity
    });
  };

  const removeFromCart = async (productId: string) => {
    setCart(cart.filter(item => item.productId !== productId));

    // Delete from database
    const cartItem = await db.listDocuments('cart_items', {
      filters: {
        userId: { $eq: db.auth.getCurrentUser()?.id },
        productId: { $eq: productId }
      }
    });

    if (cartItem[0]) {
      await db.deleteDocument('cart_items', cartItem[0].id);
    }
  };

  const checkout = async () => {
    const user = db.auth.getCurrentUser();
    if (!user) throw new Error('Please login to checkout');

    // Calculate total
    const total = cart.reduce((sum, item) => {
      return sum + (item.product?.price || 0) * item.quantity;
    }, 0);

    // Create order
    const order = await db.createDocument<Order>('orders', {
      userId: user.id,
      items: cart,
      total,
      status: 'pending'
    });

    // Clear cart
    setCart([]);

    return order;
  };

  return { cart, addToCart, removeFromCart, checkout };
}

// components/ProductCard.tsx
export function ProductCard({ product }: { product: Product }) {
  const { addToCart } = useCart();

  return (
    <div className="product-card">
      <img src={product.images[0]} alt={product.name} />
      <h3>{product.name}</h3>
      <p>{product.description}</p>
      <p className="price">${product.price.toFixed(2)}</p>
      <p className="stock">
        {product.stock > 0 ? `${product.stock} in stock` : 'Out of stock'}
      </p>
      <button
        onClick={() => addToCart(product.id)}
        disabled={product.stock === 0}
      >
        Add to Cart
      </button>
    </div>
  );
}

// components/Cart.tsx
export function Cart() {
  const { cart, removeFromCart, checkout } = useCart();
  const [loading, setLoading] = useState(false);

  const handleCheckout = async () => {
    setLoading(true);
    try {
      const order = await checkout();
      alert(`Order placed! Order ID: ${order.id}`);
    } finally {
      setLoading(false);
    }
  };

  const total = cart.reduce((sum, item) =>
    sum + (item.product?.price || 0) * item.quantity, 0
  );

  return (
    <div className="cart">
      <h2>Shopping Cart</h2>
      {cart.map(item => (
        <div key={item.productId} className="cart-item">
          <span>{item.product?.name}</span>
          <span>x{item.quantity}</span>
          <span>${((item.product?.price || 0) * item.quantity).toFixed(2)}</span>
          <button onClick={() => removeFromCart(item.productId)}>
            Remove
          </button>
        </div>
      ))}
      <div className="cart-total">
        <strong>Total: ${total.toFixed(2)}</strong>
      </div>
      <button onClick={handleCheckout} disabled={loading || cart.length === 0}>
        {loading ? 'Processing...' : 'Checkout'}
      </button>
    </div>
  );
}

// models/product.dart
class Product {
  final String id;
  final String name;
  final String description;
  final double price;
  final int stock;
  final String category;
  final List<String> images;

  Product({
    required this.id,
    required this.name,
    required this.description,
    required this.price,
    required this.stock,
    required this.category,
    required this.images,
  });

  factory Product.fromJson(Map<String, dynamic> json) {
    return Product(
      id: json['id'],
      name: json['name'],
      description: json['description'],
      price: json['price'].toDouble(),
      stock: json['stock'],
      category: json['category'],
      images: List<String>.from(json['images']),
    );
  }
}

// providers/product_provider.dart
class ProductProvider with ChangeNotifier {
  final Cocobase _db;
  List<Product> _products = [];
  bool _loading = false;

  ProductProvider(this._db);

  List<Product> get products => _products;
  bool get loading => _loading;

  Future<void> loadProducts({String? category}) async {
    _loading = true;
    notifyListeners();

    try {
      final filters = category != null
        ? {'category': {'\$eq': category}}
        : null;

      final data = await _db.listDocuments('products', filters: filters);
      _products = data.map((json) => Product.fromJson(json)).toList();
    } finally {
      _loading = false;
      notifyListeners();
    }
  }

  Future<void> searchProducts(String query) async {
    final data = await _db.listDocuments('products', filters: {
      'name': {'\$contains': query}
    });
    _products = data.map((json) => Product.fromJson(json)).toList();
    notifyListeners();
  }
}

// providers/cart_provider.dart
class CartProvider with ChangeNotifier {
  final Cocobase _db;
  final Map<String, int> _items = {};

  CartProvider(this._db);

  Map<String, int> get items => _items;
  int get itemCount => _items.length;

  double getTotal(List<Product> products) {
    double total = 0;
    _items.forEach((productId, quantity) {
      final product = products.firstWhere((p) => p.id == productId);
      total += product.price * quantity;
    });
    return total;
  }

  Future<void> addItem(String productId, {int quantity = 1}) async {
    if (_items.containsKey(productId)) {
      _items[productId] = _items[productId]! + quantity;
    } else {
      _items[productId] = quantity;
    }

    await _db.createDocument('cart_items', {
      'userId': (await _db.getCurrentUser())?['id'],
      'productId': productId,
      'quantity': quantity,
    });

    notifyListeners();
  }

  Future<void> removeItem(String productId) async {
    _items.remove(productId);

    final cartItems = await _db.listDocuments('cart_items', filters: {
      'productId': {'\$eq': productId}
    });

    if (cartItems.isNotEmpty) {
      await _db.deleteDocument('cart_items', cartItems[0]['id']);
    }

    notifyListeners();
  }

  Future<String> checkout(List<Product> products) async {
    final total = getTotal(products);
    final user = await _db.getCurrentUser();

    final order = await _db.createDocument('orders', {
      'userId': user?['id'],
      'items': _items.entries.map((e) => {
        'productId': e.key,
        'quantity': e.value,
      }).toList(),
      'total': total,
      'status': 'pending',
    });

    _items.clear();
    notifyListeners();

    return order['id'];
  }
}

A social media application with posts, likes, comments, and follows.

Features

Create and view posts
Like/unlike posts
Comment on posts
Follow/unfollow users
Real-time feed updates
User profiles

JavaScript/React

// types/social.ts
export interface Post {
  id: string;
  userId: string;
  user?: User;
  content: string;
  images?: string[];
  likes: string[];
  commentCount: number;
  createdAt: string;
}

export interface Comment {
  id: string;
  postId: string;
  userId: string;
  user?: User;
  content: string;
  createdAt: string;
}

export interface User {
  id: string;
  email: string;
  data: {
    full_name: string;
    avatar?: string;
    bio?: string;
  };
}

// hooks/useFeed.ts
export function useFeed() {
  const [posts, setPosts] = useState<Post[]>([]);
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    loadFeed();

    // Real-time updates
    const unsubscribe = db.watch('posts', (event) => {
      if (event.type === 'create') {
        setPosts(prev => [event.data as Post, ...prev]);
      } else if (event.type === 'update') {
        setPosts(prev => prev.map(p =>
          p.id === event.data.id ? event.data as Post : p
        ));
      } else if (event.type === 'delete') {
        setPosts(prev => prev.filter(p => p.id !== event.documentId));
      }
    });

    return () => unsubscribe();
  }, []);

  const loadFeed = async () => {
    try {
      const data = await db.listDocuments<Post>('posts', {
        sort: { createdAt: -1 },
        populate: ['userId'],
        limit: 20
      });
      setPosts(data);
    } finally {
      setLoading(false);
    }
  };

  const createPost = async (content: string, images?: string[]) => {
    const post = await db.createDocument<Post>('posts', {
      userId: db.auth.getCurrentUser()?.id,
      content,
      images: images || [],
      likes: [],
      commentCount: 0
    });
    return post;
  };

  const likePost = async (postId: string) => {
    const userId = db.auth.getCurrentUser()?.id;
    const post = posts.find(p => p.id === postId);

    if (!post || !userId) return;

    const likes = post.likes.includes(userId)
      ? post.likes.filter(id => id !== userId)
      : [...post.likes, userId];

    await db.updateDocument('posts', postId, { likes });
  };

  const deletePost = async (postId: string) => {
    await db.deleteDocument('posts', postId);
  };

  return { posts, loading, createPost, likePost, deletePost };
}

// hooks/useComments.ts
export function useComments(postId: string) {
  const [comments, setComments] = useState<Comment[]>([]);

  useEffect(() => {
    loadComments();
  }, [postId]);

  const loadComments = async () => {
    const data = await db.listDocuments<Comment>('comments', {
      filters: { postId: { $eq: postId } },
      sort: { createdAt: -1 },
      populate: ['userId']
    });
    setComments(data);
  };

  const addComment = async (content: string) => {
    const comment = await db.createDocument<Comment>('comments', {
      postId,
      userId: db.auth.getCurrentUser()?.id,
      content
    });

    // Increment comment count
    const post = await db.getDocument('posts', postId);
    await db.updateDocument('posts', postId, {
      commentCount: (post.commentCount || 0) + 1
    });

    return comment;
  };

  return { comments, addComment };
}

// components/PostCard.tsx
export function PostCard({ post }: { post: Post }) {
  const { likePost, deletePost } = useFeed();
  const currentUser = db.auth.getCurrentUser();
  const isLiked = post.likes.includes(currentUser?.id || '');

  return (
    <div className="post-card">
      <div className="post-header">
        <img src={post.user?.data.avatar} alt={post.user?.data.full_name} />
        <div>
          <h4>{post.user?.data.full_name}</h4>
          <span>{new Date(post.createdAt).toLocaleDateString()}</span>
        </div>
      </div>

      <p className="post-content">{post.content}</p>

      {post.images && post.images.length > 0 && (
        <div className="post-images">
          {post.images.map((img, i) => (
            <img key={i} src={img} alt="" />
          ))}
        </div>
      )}

      <div className="post-actions">
        <button onClick={() => likePost(post.id)}>
          {isLiked ? '❤️' : '🤍'} {post.likes.length}
        </button>
        <button>💬 {post.commentCount}</button>
        {currentUser?.id === post.userId && (
          <button onClick={() => deletePost(post.id)}>🗑️ Delete</button>
        )}
      </div>
    </div>
  );
}

// components/CreatePost.tsx
export function CreatePost() {
  const { createPost } = useFeed();
  const [content, setContent] = useState('');
  const [posting, setPosting] = useState(false);

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    if (!content.trim()) return;

    setPosting(true);
    try {
      await createPost(content);
      setContent('');
    } finally {
      setPosting(false);
    }
  };

  return (
    <form onSubmit={handleSubmit} className="create-post">
      <textarea
        value={content}
        onChange={(e) => setContent(e.target.value)}
        placeholder="What's on your mind?"
        rows={3}
      />
      <button type="submit" disabled={posting || !content.trim()}>
        {posting ? 'Posting...' : 'Post'}
      </button>
    </form>
  );
}

Real-Time Chat Application

A complete chat app with rooms, direct messages, and online status.

Features

Real-time messaging
Chat rooms
Direct messages
Online status
Typing indicators
Message history

JavaScript/React

// hooks/useChat.ts
export function useChat(roomId: string) {
  const [messages, setMessages] = useState<Message[]>([]);
  const [typing, setTyping] = useState<string[]>([]);

  useEffect(() => {
    // Load message history
    loadMessages();

    // Subscribe to new messages
    const unsubscribe = db.realtimeApi.joinRoom(roomId, (event) => {
      if (event.type === 'message') {
        setMessages(prev => [...prev, event.data]);
      } else if (event.type === 'typing') {
        setTyping(prev => [...prev, event.userId]);
        setTimeout(() => {
          setTyping(prev => prev.filter(id => id !== event.userId));
        }, 3000);
      }
    });

    return () => unsubscribe();
  }, [roomId]);

  const loadMessages = async () => {
    const data = await db.listDocuments('messages', {
      filters: { roomId: { $eq: roomId } },
      sort: { createdAt: 1 },
      populate: ['userId'],
      limit: 50
    });
    setMessages(data);
  };

  const sendMessage = async (content: string) => {
    const message = await db.createDocument('messages', {
      roomId,
      userId: db.auth.getCurrentUser()?.id,
      content
    });

    // Broadcast to room
    await db.realtimeApi.broadcast(roomId, {
      type: 'message',
      data: message
    });

    return message;
  };

  const sendTyping = async () => {
    await db.realtimeApi.broadcast(roomId, {
      type: 'typing',
      userId: db.auth.getCurrentUser()?.id
    });
  };

  return { messages, typing, sendMessage, sendTyping };
}

// components/ChatRoom.tsx
export function ChatRoom({ roomId }: { roomId: string }) {
  const { messages, typing, sendMessage, sendTyping } = useChat(roomId);
  const [input, setInput] = useState('');
  const messagesEndRef = useRef<HTMLDivElement>(null);

  useEffect(() => {
    messagesEndRef.current?.scrollIntoView({ behavior: 'smooth' });
  }, [messages]);

  const handleSend = async (e: React.FormEvent) => {
    e.preventDefault();
    if (!input.trim()) return;

    await sendMessage(input);
    setInput('');
  };

  const handleTyping = () => {
    sendTyping();
  };

  return (
    <div className="chat-room">
      <div className="messages">
        {messages.map(msg => (
          <div key={msg.id} className="message">
            <strong>{msg.user?.data.full_name}:</strong>
            <span>{msg.content}</span>
            <small>{new Date(msg.createdAt).toLocaleTimeString()}</small>
          </div>
        ))}
        {typing.length > 0 && (
          <div className="typing-indicator">
            Someone is typing...
          </div>
        )}
        <div ref={messagesEndRef} />
      </div>

      <form onSubmit={handleSend} className="message-input">
        <input
          value={input}
          onChange={(e) => {
            setInput(e.target.value);
            handleTyping();
          }}
          placeholder="Type a message..."
        />
        <button type="submit">Send</button>
      </form>
    </div>
  );
}

Notes App with Real-Time Sync

A collaborative notes app with folders and real-time synchronization.

Features

Create and organize notes in folders
Rich text editing
Real-time sync across devices
Collaboration with other users
Search notes

// Full implementation available in the examples repository

Complete App Architecture

All these apps follow this general architecture:

/src
  /lib
    cocobase.ts         # Cocobase client setup
  /types
    index.ts            # TypeScript interfaces
  /hooks
    useAuth.ts          # Authentication hook
    useData.ts          # Data fetching hooks
  /components
    ...                 # React components
  /pages or /screens
    ...                 # App pages/screens

Best Practices

Data Modeling

Keep documents denormalized for read performance
Use relationships for one-to-many associations
Store frequently accessed data together

Real-Time Updates

Only subscribe to data you’re actively displaying - Unsubscribe when components unmount - Filter subscriptions to reduce bandwidth

Error Handling

Always handle errors in async operations - Show user-friendly error messages
Implement retry logic for network errors

Performance

Paginate large lists
Cache frequently accessed data
Use optimistic UI updates

Source Code

Find complete source code for all these examples in our GitHub repository:

Cocobase Examples Repository

Full source code, setup instructions, and live demos

Next Steps

Deploy Your App

Learn how to deploy your Cocobase app to production

Best Practices

Optimize your app for performance and security

Complete Applications

Complete App Examples

Complete Application Examples

Todo Application

Features

E-Commerce Application

Features

Features

Real-Time Chat Application

Features

Notes App with Real-Time Sync

Features

Complete App Architecture

Best Practices

Source Code

Cocobase Examples Repository

Next Steps

Deploy Your App

Best Practices

Complete Applications

​Complete Application Examples

​Todo Application

​Features

​E-Commerce Application

​Features

​Social Media Feed

​Features

​Real-Time Chat Application

​Features

​Notes App with Real-Time Sync

​Features

​Complete App Architecture

​Best Practices

​Source Code

Cocobase Examples Repository

​Next Steps

Deploy Your App

Best Practices

Complete Application Examples

Todo Application

Features

E-Commerce Application

Features

Social Media Feed

Features

Real-Time Chat Application

Features

Notes App with Real-Time Sync

Features

Complete App Architecture

Best Practices

Source Code

Next Steps