frontend-hamroun

Your Package Name

A lightweight Virtual DOM and hooks implementation with JSX support.

Installation

npm install your-package-name

Quick Start

Create a new project using:

npx create-frontend-app my-app
# or
npm create frontend-app@latest my-app

Then:

cd my-app
npm install
npm run dev

Usage

import { render, useState } from 'your-package-name';

function App() {
  const [count, setCount] = useState(0);
  return (
    <div>
      <h1>Count: {count}</h1>
      <button onClick={() => setCount(count + 1)}>Increment</button>
    </div>
  );
}

render(<App />, document.getElementById('root'));

Features

• Virtual DOM with efficient diffing
• Hooks (useState, useEffect, useMemo, useRef)
• Context API
• Batch updates
• Hydration support

Hooks

useState

Manages component state.

const [state, setState] = useState(initialValue);

useEffect

Handles side effects in components.

useEffect(() => {
  // Effect code
  return () => {
    // Cleanup code
  };
}, [dependencies]);

useMemo

Memoizes expensive computations.

const memoizedValue = useMemo(() => computeExpensiveValue(a, b), [a, b]);

useRef

Creates a mutable reference.

const ref = useRef(initialValue);

useErrorBoundary

Handles component errors.

const [error, resetError] = useErrorBoundary();

Context API

Create and use shared state across components.

const ThemeContext = createContext('light');

function App() {
  return (
    <ThemeContext.Provider value="dark">
      <Child />
    </ThemeContext.Provider>
  );
}

function Child() {
  const theme = useContext(ThemeContext);
  // Or use selector for performance
  const isDark = ThemeContext.useSelector(theme => theme === 'dark');
}

Performance Optimization

Batch Updates

Group multiple state updates together.

import { batchUpdates } from 'your-package-name';

batchUpdates(() => {
  setValue1(newValue1);
  setValue2(newValue2);
});

Component Memoization

Prevent unnecessary re-renders.

const MemoizedComponent = useMemo(() => (
  <ExpensiveComponent prop={value} />
), [value]);

Server-Side Rendering

import { hydrate } from 'your-package-name';

// On the client
hydrate(<App />, document.getElementById('root'));

Event Handling

function Button() {
  return (
    <button 
      onClick={(e) => handleClick(e)}
      onMouseOver={(e) => handleHover(e)}
    >
      Click me
    </button>
  );
}

Styling

function StyledComponent() {
  return (
    <div style={{ 
      color: 'blue',
      padding: '20px'
    }}>
      Styled content
    </div>
  );
}

Error Handling

function ErrorBoundary() {
  const [error, resetError] = useErrorBoundary();

  if (error) {
    return (
      <div>
        <h1>Something went wrong!</h1>
        <button onClick={resetError}>Try again</button>
      </div>
    );
  }

  return <ComponentThatMightError />;
}

Best Practices

1. Use batch updates for multiple state changes
2. Implement error boundaries for error handling
3. Use context selectors for better performance
4. Memoize expensive computations
5. Clean up effects when components unmount
6. Keep components small and focused
7. Use proper TypeScript types for better development experience

API Reference

Core

• render(element, container)
• hydrate(element, container)
• createElement(vnode)

Hooks

• useState<T>(initial: T)
• useEffect(callback, deps?)
• useMemo(factory, deps)
• useRef(initial)
• useErrorBoundary()

Context

• createContext(defaultValue)
• useContext(Context)
• Context.Provider
• Context.Consumer
• Context.useSelector

Performance

• batchUpdates(callback)

License

MIT License - feel free to use in any project.

Contributing

Contributions are welcome! Please read our contributing guidelines and submit pull requests.