React Router Basics

React Router is a library used to handle client-side routing in React applications. It allows you to create multiple pages without reloading the browser.

Why Use React Router?

• Enables navigation in single-page applications (SPA)

• Updates the URL without page refresh

• Maps URLs to React components

• Improves user experience

Installation

npm install react-router-dom

Basic Setup

Wrap your app with BrowserRouter.

import { BrowserRouter } from "react-router-dom";

function App() {
  return (
    <BrowserRouter>
      <Routes />
    </BrowserRouter>
  );
}

Defining Routes

import { Routes, Route } from "react-router-dom";

function RoutesConfig() {
  return (
    <Routes>
      <Route path="/" element={<Home />} />
      <Route path="/about" element={<About />} />
      <Route path="/contact" element={<Contact />} />
    </Routes>
  );
}

Navigation with Link

import { Link } from "react-router-dom";

function Navbar() {
  return (
    <nav>
      <Link to="/">Home</Link>
      <Link to="/about">About</Link>
    </nav>
  );
}

useParams (URL Parameters)

import { useParams } from "react-router-dom";

function User() {
  const { id } = useParams();
  return <p>User ID: {id}</p>;
}

Route:

<Route path="/user/:id" element={<User />} />

useNavigate (Programmatic Navigation)

import { useNavigate } from "react-router-dom";

function Login() {
  const navigate = useNavigate();

  function handleLogin() {
    navigate("/dashboard");
  }

  return <button onClick={handleLogin}>Login</button>;
}

Nested Routes

<Route path="/dashboard" element={<Dashboard />}>
  <Route path="profile" element={<Profile />} />
  <Route path="settings" element={<Settings />} />
</Route>

Use inside Dashboard.

404 Page (Not Found)

<Route path="*" element={<NotFound />} />

Common Hooks

Best Practices

• Keep routes organized

• Use layout components

• Lazy load routes when needed

• Use meaningful URLs

Key Points

• React Router handles SPA routing

• BrowserRouter wraps the app

• Routes and Route define paths

• Hooks enable dynamic navigation