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react / React Router Introduction
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React Router Introduction

In traditional multi-page websites, clicking a link requests a new HTML page from the server, causing a full page reload. In React, we build single-page applications (SPAs) where all content loads once, and subsequent navigation happens without refreshing the page. **React Router** is the library that makes this possible.

What is React Router?

React Router is a standard library for routing in React. It enables navigation between different components in a React app, keeping the UI in sync with the URL. It allows you to define routes, handle dynamic URLs, and create a seamless user experience.

Think of React Router as the traffic controller of your app. It decides which component to show based on the current URL, without asking the server for a new page.

Why Do We Need Routing?

  • Deep linking: Users can bookmark or share specific URLs.
  • Back/forward buttons: Browser navigation works as expected.
  • Organized code: Different URLs can load different components.

Installation
npm install react-router-dom

Basic Setup
import { BrowserRouter, Routes, Route } from 'react-router-dom';
import Home from './pages/Home';
import About from './pages/About';
import Contact from './pages/Contact';

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

Key Components

ComponentPurpose
`BrowserRouter`Wraps your app and enables routing using the HTML5 history API.
`Routes`Container for all your `Route` components. It decides which route to render.
`Route`Defines a mapping between a URL path and a React component.
`Link`A replacement for `` tags that navigates without page reload.

Two Minute Drill

  • React Router enables navigation in single-page React apps without page refresh.
  • `BrowserRouter` wraps the app, `Routes` and `Route` define the URL-component mappings.
  • Install via `npm install react-router-dom`.
  • Routing provides deep linking, back/forward navigation, and code organization.
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