React Router v6 introduced significant improvements and changes compared to v5. Here’s a breakdown of the key differences:

1. Switch vs Routes

• v5: Uses Switch to wrap your routes.

  <Switch>
    <Route path="/" component={Home} />
    <Route path="/about" component={About} />
  </Switch>

• v6: Replaces Switch with Routes, and component is replaced with element which requires JSX.

  <Routes>
    <Route path="/" element={<Home />} />
    <Route path="/about" element={<About />} />
  </Routes>

2. No More exact Prop

• v5: You need the exact prop to avoid partial matches in routes.

  <Route path="/" exact component={Home} />

• v6: All routes are exact by default, so no need for the exact prop anymore.

3. Nested Routes

• v5: Nested routes are created by placing Route components inside the parent’s component.

  function App() {
    return (
      <Switch>
        <Route path="/dashboard" component={Dashboard} />
        <Route path="/dashboard/settings" component={Settings} />
      </Switch>
    );
  }

• v6: Nested routes are directly declared within the Routes structure.

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

4. useNavigate vs useHistory

• v5: useHistory() was used for programmatic navigation.

  const history = useHistory();
  history.push('/about');

• v6: Replaces useHistory with useNavigate().

  const navigate = useNavigate();
  navigate('/about');

5. Route Rendering Methods

• v5: You could use component, render, or children props to render components.

  <Route path="/" component={Home} />
  <Route path="/about" render={() => <About />} />

• v6: Removes component and render. You now use only element for JSX rendering.

  <Route path="/" element={<Home />} />

6. Relative Routes

• v5: When navigating, you needed to construct absolute paths.

  <Link to="/dashboard/settings">Settings</Link>

• v6: Supports relative paths based on the current route.

  <Link to="settings">Settings</Link>

7. Redirect vs Navigate

• v5: Used the Redirect component to handle route redirects.

  <Redirect to="/login" />

• v6: Replaces Redirect with Navigate.

  <Navigate to="/login" />

8. Hooks API Improvements

• v6: Simplified hooks, like useParams, useNavigate, useRoutes for greater flexibility.

Summary of Key Changes:

• Switch replaced by Routes.
• exact prop no longer needed.
• More intuitive nested routes structure.
• useHistory replaced by useNavigate.
• Routes are rendered using the element prop exclusively.

These changes streamline the API and make route handling simpler in React Router v6.