useQState - A Custom State Management Hook with TanStack Query

useQState is a custom React hook that simplifies state management by leveraging TanStack Query. It offers an efficient way to manage both global and local state with automatic serialization of complex data types, all while taking advantage of TanStack Query's powerful caching capabilities.

Features

• Seamless State Management: Manage state across your React application without additional state management libraries.
• Performance Optimizations: Benefit from TanStack Query's caching and performance features.
• Intuitive API: Familiar API similar to React's useState hook.

Installation

First, ensure you have React, TanStack Query:

npm install @tanstack/react-query @acoboyz/react-qstate

Setup

Before using useQState, you need to set up the QueryClient and wrap your application with the QueryClientProvider from TanStack Query.

import React from 'react';
import { QueryClient, QueryClientProvider } from '@tanstack/react-query';

const queryClient = new QueryClient();

function App() {
  return (
    <QueryClientProvider client={queryClient}>
      {/* Your app components go here */}
    </QueryClientProvider>
  );
}

export default App;

Usage

Importing the Hook

import { useQState } from '@acoboyz/react-qstate';

Basic Example

import React from 'react';
import { useQState } from '@acoboyz/react-qstate';

function Counter() {
  const [count, setCount, resetCount] = useQState<number>(['counter'], 0);

  return (
    <div>
      <p>Count: {count}</p>
      <button onClick={() => setCount(prev => prev + 1)}>Increment</button>
      <button onClick={resetCount}>Reset</button>
    </div>
  );
}

Managing Complex Data Types

useQState automatically serializes and deserializes complex data types like objects and arrays.

import React from 'react';
import { useQState } from '@acoboyz/react-qstate';

interface UserProfile {
  id: number;
  name: string;
  email: string;
}

function Profile() {
  const [user, setUser, resetUser] = useQState<UserProfile | null>(['userProfile'], null);

  const updateEmail = (email: string) => {
    setUser(prevUser => prevUser ? { ...prevUser, email } : null);
  };

  return (
    <div>
      {user ? (
        <>
          <h1>{user.name}</h1>
          <p>{user.email}</p>
          <button onClick={() => updateEmail('newemail@example.com')}>Update Email</button>
        </>
      ) : (
        <p>No user data available.</p>
      )}
      <button onClick={resetUser}>Reset Profile</button>
    </div>
  );
}

Resetting State

You can reset the state to its initial value using the resetState function.

const [state, setState, resetState] = useQState(['myStateKey'], initialValue);

// To reset the state
resetState();

How It Works

The useQState hook uses TanStack Query to manage stateful data to serialize and deserialize complex data types. Here's a brief overview:

• State Initialization: When you first call useQState, it initializes the state with the provided initialData.
• Caching: TanStack Query caches the state data, allowing for efficient updates and retrievals.
• State Updates: Use the setState function to update the state. It supports both direct updates and updater functions (like React's setState).
• State Reset: The resetState function invalidates the query and resets the state to its initial value.

Benefits

• Global State Without Additional Libraries: Manage global state without needing Redux or Context API.
• Performance Optimizations: Leverage TanStack Query's caching to minimize unnecessary re-renders and data fetching.
• Simple API: Designed to be as straightforward as React's built-in hooks.

Example: Todo List

import React from 'react';
import { useQState } from '@acoboyz/react-qstate';

interface Todo {
  id: number;
  text: string;
  completed: boolean;
}

function TodoApp() {
  const [todos, setTodos, resetTodos] = useQState<Todo[]>(['todos'], []);

  const addTodo = (text: string) => {
    setTodos(prevTodos => [...prevTodos, { id: Date.now(), text, completed: false }]);
  };

  const toggleTodo = (id: number) => {
    setTodos(prevTodos =>
      prevTodos.map(todo => (todo.id === id ? { ...todo, completed: !todo.completed } : todo))
    );
  };

  return (
    <div>
      <button onClick={() => addTodo('New Task')}>Add Todo</button>
      <button onClick={resetTodos}>Reset Todos</button>
      <ul>
        {todos.map(todo => (
          <li key={todo.id}>
            <span
              onClick={() => toggleTodo(todo.id)}
              style={{ textDecoration: todo.completed ? 'line-through' : undefined }}
            >
              {todo.text}
            </span>
          </li>
        ))}
      </ul>
    </div>
  );
}

Advanced Usage

Using with Local Storage

If you want to persist state across browser sessions, you can integrate localStorage:

import { useQState } from '@acoboyz/react-qstate';

function usePersistentState<T>(key: string, initialData: T) {
  const [state, setState, resetState] = useQState<T>([key], initialData);

  React.useEffect(() => {
    const storedData = localStorage.getItem(key);
    if (storedData) {
      setState(JSON.parse(storedData));
    }
  }, [key, setState]);

  React.useEffect(() => {
    localStorage.setItem(key, JSON.stringify(state));
  }, [key, state]);

  return [state, setState, resetState] as const;
}

Contributing

Contributions are welcome! Feel free to open issues or submit pull requests on the GitHub repository.

License

This project is licensed under the MIT License.

Acknowledgments

• TanStack Query for powerful asynchronous state management.

By providing this hook, we aim to simplify state management in React applications, making it more efficient and developer-friendly. If you have any questions or need further assistance, please don’t hesitate to reach out.