React Router

React Router is a popular library for handling navigation and routing in React applications. It enables you to create single-page applications (SPAs) with dynamic and client-side routing.

In React applications, navigation refers to how users move between different views or pages. React Router provides a powerful and declarative way to handle routing, allowing you to update the UI based on the URL.

Key Concepts:

Installation:

npm install react-router-dom

import React from 'react';
import { BrowserRouter as Router, Route, Link } from 'react-router-dom';

const Home = () => <h2>Home</h2>;
const About = () => <h2>About</h2>;

const App = () => (
  <Router>
    <div>
      <nav>
        <ul>
          <li><Link to="/">Home</Link></li>
          <li><Link to="/about">About</Link></li>
        </ul>
      </nav>

      <Route path="/" exact component={Home} />
      <Route path="/about" component={About} />
    </div>
  </Router>
);

export default App;

• BrowserRouter provides the foundation for navigation.
• Link components create links for navigation.
• Route components define the association between a URL path and a component to render.

Route Parameters:

import React from 'react';
import { BrowserRouter as Router, Route, Link } from 'react-router-dom';

const UserProfile = ({ match }) => (
  <div>
    <h2>User Profile</h2>
    <p>User ID: {match.params.userId}</p>
  </div>
);

const App = () => (
  <Router>
    <div>
      <nav>
        <ul>
          <li><Link to="/user/123">User Profile</Link></li>
        </ul>
      </nav>

      <Route path="/user/:userId" component={UserProfile} />
    </div>
  </Router>
);

export default App;

import React from 'react';
import { BrowserRouter as Router, Route, Link } from 'react-router-dom';

const Home = () => <h2>Home</h2>;
const UserProfile = () => <h2>User Profile</h2>;

const App = () => (
  <Router>
    <div>
      <nav>
        <ul>
          <li><Link to="/">Home</Link></li>
          <li><Link to="/user">User Profile</Link></li>
        </ul>
      </nav>

      <Route path="/" exact component={Home} />
      <Route path="/user" component={UserProfile} />
    </div>
  </Router>
);

export default App;

• SPA Navigation: Creating single-page applications with seamless navigation.
• Conditional Rendering: Showing or hiding components based on the current route.
• Authentication: Protecting certain routes based on user authentication.