How to implement authenticated routes in React Router 4?

You’re going to want to use the Redirect component. There’s a few different approaches to this problem. Here’s one I like, have a PrivateRoute component that takes in an authed prop and then renders based on that props.

function PrivateRoute ({component: Component, authed, ...rest}) {
  return (
    <Route
      {...rest}
      render={(props) => authed === true
        ? <Component {...props} />
        : <Redirect to={{pathname: '/login', state: {from: props.location}}} />}
    />
  )
}

Now your Routes can look something like this

<Route path='/' exact component={Home} />
<Route path='/login' component={Login} />
<Route path='/register' component={Register} />
<PrivateRoute authed={this.state.authed} path='/dashboard' component={Dashboard} />

If you’re still confused, I wrote this post that may help – Protected routes and authentication with React Router v4