How do I effectively nest routes in React Router v4 or v5?

Nested Routes with React Router v4 / v5

When working with React Router, it's often necessary to create nested routes to organize your application's navigation structure. This allows you to group related routes together and create a hierarchical routing system.

Problem:

Users may encounter difficulties nesting routes in React Router v4 or v5. One common challenge is determining how to split an application into separate sections, such as a frontend and admin area, and ensure that child routes are rendered within the appropriate components.

Answer:

In React Router v4 and v5, nesting is not achieved by nesting components. Instead, routes are nested within other components. This approach differs from the nesting syntax used in previous versions of React Router.

For example, consider the following route configuration:

<code class="jsx"><Route path='/' component={Frontpage}>
  <Route path='/home' component={HomePage} />
  <Route path='/about' component={AboutPage} />
</Route>
<Route path='/admin' component={Backend}>
  <Route path='/home' component={Dashboard} />
  <Route path='/users' component={UserPage} />
</Route>
<Route component={NotFoundPage} /></code>

In this configuration, the Frontpage component serves as the parent component for the frontend routes, and the Backend component is the parent component for the admin routes. This allows you to create separate layouts and styles for each section of your application.

For instance, the Topics route previously defined as nested within can be rewritten as follows:

<code class="jsx"><Route path='/topics' component={Topics} /></code>

And the Topics component would then render its child routes as follows:

<code class="jsx">const Topics = ({ match }) => (
  <div>
    <h2>Topics</h2>
    <Link to={`${match.url}/exampleTopicId`}>
      Example topic
    </Link>
    <Route path={`${match.path}/:topicId`} component={Topic}/>
  </div>
);</code>

By following this approach, you can effectively nest routes in React Router v4 or v5. This allows you to create clear and organized navigation structures for your application.

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