Welcome to Day 8 of our React.js learning journey! Today, we'll explore some advanced topics in React development that will help you build more sophisticated and efficient applications. 🧠

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React Hooks 🪝

React Hooks are a powerful feature in React that allow you to use state and other React features in functional components. They provide a way to "hook into" React state and lifecycle methods from functional components.

Example of Using React Hooks: 🔍

import { useState, useEffect } from 'react';

function Counter() {
  const [count, setCount] = useState(0);

  useEffect(() => {
    // This effect will run once when the component mounts
    console.log('Mounted');
  }, []);

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

In this example, we're using the useState hook to create a state variable count and a function setCount to update it. We're also using the useEffect hook to run a side effect when the component mounts. 🎉

React Context 🌐

React Context is a way to share data between components without having to pass props down manually. It provides a way to create a centralized store for your application's state.

Example of Using React Context: 🔧

import { createContext, useState } from 'react';

const ThemeContext = createContext();

function ThemeProvider({ children }) {
  const [theme, setTheme] = useState('light');

  return (
    <ThemeContext.Provider value={{ theme, setTheme }}>
      {children}
    </ThemeContext.Provider>
  );
}

function App() {
  return (
    <ThemeProvider>
      <div>
        <h1>Theme: {theme}</h1>
        <button onClick={() => setTheme('dark')}>Toggle Theme</button>
      </div>
    </ThemeProvider>
  );
}

In this example, we're creating a ThemeContext and a ThemeProvider component that wraps our application. We're using the useState hook to create a state variable theme and a function setTheme to update it. We're then using the ThemeContext to share this state with our components. 💻

Conclusion 🎉

Today, you've learned about advanced React topics such as React Hooks and React Context. These features provide a way to manage state and share data between components in a more efficient and scalable way.

Series Index

By mastering these advanced topics, you'll be better equipped to build complex and scalable React applications. Remember to keep practicing and experimenting with new libraries and techniques to continuously improve your React.js skills. 💪

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