React Router 6

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Run Complete Project

• index.js

// import App from './App';
import App from './final/App';

Docs

React Router Docs

Install

npm install react-router-dom@6

First Pages

• App.js

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

function App() {
  return (
    <BrowserRouter>
      <Routes>
        <Route path='/' element={<div>home page</div>} />
        <Route
          path='testing'
          element={
            <div>
              <h2>testing </h2>
            </div>
          }
        />
      </Routes>
    </BrowserRouter>
  );
}

export default App;

Components

• App.js

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

function App() {
  return (
    <BrowserRouter>
      <Routes>
        <Route path='/' element={<Home />} />
        <Route path='about' element={<About />} />
        <Route path='products' element={<Products />} />
      </Routes>
    </BrowserRouter>
  );
}

export default App;

Links

• Home.js, About.js

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

const Home = () => {
  return (
    <div>
      <h2>Home Page</h2>
      <Link to='/about' className='btn'>
        About
      </Link>
      <a href="">
    </div>
  );
};
export default Home;

Error Page

• App.js

function App() {
  return (
    <BrowserRouter>
      <Routes>
        <Route path='/' element={<Home />} />
        <Route path='about' element={<About />} />
        <Route path='products' element={<Products />} />
        <Route path='*' element={<Error />} />
      </Routes>
    </BrowserRouter>
  );
}

• Error.js

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

const Error = () => {
  return (
    <section className='section'>
      <h2>404</h2>
      <p>page not found</p>
      <Link to='/'>back home</Link>
    </section>
  );
};
export default Error;

Nested Pages

• will refactor few times

• App.js

function App() {
  return (
    <BrowserRouter>
      <Routes>
        <Route path='/' element={<Home />}>
          <Route path='about' element={<About />} />
          <Route path='products' element={<Products />} />
          <Route path='*' element={<Error />} />
        </Route>
      </Routes>
    </BrowserRouter>
  );
}

Shared Layout

• Home.js

import { Link, Outlet } from 'react-router-dom';

const Home = () => {
  return (
    <section className='section'>
      <h2>Home Page</h2>
      <Outlet />
    </section>
  );
};
export default Home;

Navbar

• Navbar.js

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

const Navbar = () => {
  return (
    <nav className='navbar'>
      <Link to='/'>Home</Link>
      <Link to='/about'>About</Link>
      <Link to='/products'>Products</Link>
    </nav>
  );
};
export default Navbar;

• Home.js

import { Link, Outlet } from 'react-router-dom';
import Navbar from '../components/Navbar';
const Home = () => {
  return (
    <>
      <Navbar />
      <section className='section'>
        <Outlet />
      </section>
    </>
  );
};
export default Home;

Index Routes

• Index routes render in the parent routes outlet at the parent route's path.

• Index routes match when a parent route matches but none of the other children match.

• Index routes are the default child route for a parent route.

• Index routes render when the user hasn't clicked one of the items in a navigation list yet.

• copy Home.js content

• SharedLayout.js

import { Link, Outlet } from 'react-router-dom';
import Navbar from '../components/Navbar';
const SharedLayout = () => {
  return (
    <>
      <Navbar />
      <section className='section'>
        <Outlet />
      </section>
    </>
  );
};
export default SharedLayout;

• Home.js

const Home = () => {
  return (
    <section className='section'>
      <h2>Home Page</h2>
    </section>
  );
};
export default Home;

• App.js

function App() {
  return (
    <BrowserRouter>
      <Routes>
        <Route path='/' element={<SharedLayout />}>
          <Route index element={<Home />} />
          <Route path='about' element={<About />} />
          <Route path='products' element={<Products />} />
          <Route path='*' element={<Error />} />
        </Route>
      </Routes>
    </BrowserRouter>
  );
}

NavLink (style)

• StyledNavbar.js

import { NavLink } from 'react-router-dom';

<nav className='navbar'>
  <NavLink
    to='/about'
    style={({ isActive }) => {
      return { color: isActive ? 'red' : 'grey' };
    }}
  >
    Home
  </NavLink>
</nav>;

NavLink (className)

• StyledNavbar.js

<nav className='navbar'>
  <NavLink
    to='/'
    className={({ isActive }) => (isActive ? 'link active' : 'link')}
  >
    Home
  </NavLink>
</nav>

Reading URL Params

• App.js

function App() {
  return (
    <BrowserRouter>
      <Routes>
        <Route path='/' element={<SharedLayout />}>
          <Route index element={<Home />} />
          <Route path='about' element={<About />} />
          <Route path='products' element={<Products />} />
          <Route path='products/:productId' element={<SingleProduct />} />
          <Route path='*' element={<Error />} />
        </Route>
      </Routes>
    </BrowserRouter>
  );
}

Single Product

• SingleProduct.js

import { Link, useParams } from 'react-router-dom';
import products from '../data';
const SingleProduct = () => {
  const { productId } = useParams();

  return (
    <section className='section product'>
      <h2>{productId}</h2>
      <Link to='/products'>back to products</Link>
    </section>
  );
};

export default SingleProduct;

Products Page

• Products.js

import { Link } from 'react-router-dom';
import products from '../data';
const Products = () => {
  return (
    <section className='section'>
      <h2>products</h2>
      <div className='products'>
        {products.map((product) => {
          return (
            <article key={product.id}>
              <h5>{product.name}</h5>
              <Link to={`/products/${product.id}`}>more info</Link>
            </article>
          );
        })}
      </div>
    </section>
  );
};

export default Products;

Single Product

• SingleProduct.js

import { Link, useParams } from 'react-router-dom';
import products from '../data';
const SingleProduct = () => {
  const { productId } = useParams();
  const product = products.find((product) => product.id === productId);
  const { image, name } = product;

  return (
    <section className='section product'>
      <img src={image} alt={name} />
      <h5>{name}</h5>
      <Link to='/products'>back to products</Link>
    </section>
  );
};

export default SingleProduct;

useNavigate()

(?.) or Optional Chaining Explained

• App.js

function App() {
  const [user, setUser] = useState(null);

  return (
    <BrowserRouter>
      <Routes>
        <Route path='/' element={<SharedLayout />}>
          <Route index element={<Home />} />
          <Route path='about' element={<About />} />
          <Route path='products' element={<Products />} />
          <Route path='products/:productId' element={<SingleProduct />} />
          <Route path='login' element={<Login setUser={setUser} />} />
          <Route path='dashboard' element={<Dashboard user={user} />} />
          <Route path='*' element={<Error />} />
        </Route>
      </Routes>
    </BrowserRouter>
  );
}

• Login.js

 import { useState } from 'react';
import { useNavigate } from 'react-router-dom';
const Login = ({ setUser }) => {
  const [name, setName] = useState('');
  const [email, setEmail] = useState('');

  const navigate = useNavigate();

  const handleSubmit = async (e) => {
    e.preventDefault();
    if (!name || !email) return;
    setUser({ name: name, email: email });
    navigate('/dashboard');
  };

(?.) or Optional Chaining Explained

• Dashboard.js

const Dashboard = ({ user }) => {
  return (
    <section className='section'>
      <h4>Hello, {user?.name}</h4>
    </section>
  );
};
export default Dashboard;

Protected Route

• App.js

<Route
  path='dashboard'
  element={
    <ProtectedRoute user={user}>
      <Dashboard user={user} />
    </ProtectedRoute>
  }
/>

• ProtectedRoute.js

import { Navigate } from 'react-router-dom';

const ProtectedRoute = ({ children, user }) => {
  if (!user) {
    return <Navigate to='/' />;
  }
  return children;
};

export default ProtectedRoute;