How to Implement Authenticated Routing in React Router 4?

Authenticated Routing in React Router 4

Authenticated routes in React Router 4 require a different approach than in previous versions. React Router 4 no longer supports nested routes with component and children props, which makes it more challenging to implement authenticated routes.

Solution: Using Redirect Component

To implement authenticated routes, you can use the Redirect component. The Redirect component redirects the user to a different path based on a given condition.

Consider the following PrivateRoute component:

<code class="javascript">function PrivateRoute ({component: Component, authed, ...rest}) {
  return (
    <route render="{(props)"> authed === true
        ? <component></component>
        : <redirect to="{{pathname:" state: props.location></redirect>}
    />
  )
}</route></code>

This component renders the specified component if the user is authenticated (anthed === true); otherwise, it redirects the user to the login page.

Usage:

Now, you can use the PrivateRoute component in your routes like this:

<code class="javascript"><route path="/" exact component="{Home}"></route>
<route path="/login" component="{Login}"></route>
<route path="/register" component="{Register}"></route>
<privateroute authed="{this.state.authed}" path="/dashboard" component="{Dashboard}"></privateroute></code>

In this example, the PrivateRoute for the dashboard route will redirect unauthenticated users to the login page.

Alternate Solution: Dispatching Actions

Another approach, which may be less desirable, is to dispatch an action in the render method of your AuthenticatedRoute component. This might look like:

<code class="javascript">export default class AuthenticatedRoute extends React.Component {
  render() {
    if (!this.props.isLoggedIn) {
      this.props.redirectToLogin()
      return null
    }
    return <route></route>
  }
}</code>

This approach triggers a redirect to the login page when the user is not logged in, but it may feel less elegant than using the Redirect component.

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