React Router

React Router is a popular library for handling routing in React applications. It allows you to define routes in your application and navigate between different components or views without reloading the page.

Here’s a step-by-step example of how to set up and use React Router in a simple React application:

Install React Router:

First, you need to install React Router.

npm install react-router-dom

Create Components:

Next, create the components for Home, About, and Contact.

//home.jsx
import React from 'react';

function Home() {
  return <h2>Home</h2>;
}

Now, create the About.jsx component

// src/components/About.jsx
import React from 'react';

function About() {
  return <h2>About</h2>;
}

export default About;

Now, create the Contact.jsx component

// src/components/Contact.jsx
import React from 'react';

function Contact() {
  return <h2>Contact</h2>;
}

export default Contact;

Set up the Router:

In your src directory, create a new file headerMenu.jsx (if it doesn’t already exist) and set up the router.

import React from "react";
import {Link} from 'react-router-dom';
export default function HeaderMenu(){

    return (
    <>
    <nav className="navbar navbar-expand-lg bg-primary">
  <div className="container-fluid">
 
    <div className="collapse navbar-collapse" id="navbarSupportedContent">
      <ul className="navbar-nav me-auto mb-2 mb-lg-0">
        <li className="nav-item ">
          <Link className="nav-link active  text-light" aria-current="page" to="/">Home</Link>
        </li>
        <li className="nav-item">
          <Link className="nav-link text-light" to="/about-us">AboutUs</Link>
        </li>
        <li className="nav-item">
          <Link className="nav-link text-light" to="/contact-us">ContactUs</Link>
        </li>
      </ul>
      
    </div>
  </div>
</nav>
</>
    )

}

In the above example, we use Link instead of anchor (a) tag and we use to instead of href.

create Router.Example.jsx

import React from "react";
import HeaderMenu from "./HeaderMenu";
import {BrowserRouter,Routes,Route} from 'react-router-dom'
import Aboutus from "./About";
import ContactUs from "./Contact";
import Home from "./Home";

export default function RoutingExample(){

    return (
        <>
        <BrowserRouter>
        <HeaderMenu/>
        <Routes>
           <Route path="/" element={<Home/>}></Route>
            <Route path="/about-us" element={<Aboutus/>}></Route>
            <Route path="/contact-us" element={<ContactUs/>}></Route>
        </Routes>
        </BrowserRouter>
        
        </>
    )

}

This simple example demonstrates the basic usage of React Router. Here’s a brief explanation of the key parts:

BrowserRouter (aliased as Router): Wraps your application and enables routing.

Link: Used to create navigation links.

Switch: Renders the first child that matches the location.

Route: Defines a route and the component to render when the route matches.

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