import {

  HashRouter,

  Switch,

  Route,

  Redirect,

  NavLink

} from 'react-router-dom'

function App () {

  return (

   <HashRouter>

     <Navigation />

     <Switch>

       <Route

         path="/home"

         component={() => <div>Home page</div>}

         exact />

       <Route

         path="/admin"

         component={() => <div>Admin page</div>} />

       <Route

         path="/not-found"

         component={() => <div>Page not found</div>} />

       <Redirect

         from="/"

         to="/home"

         exact />

       <Redirect

         from="*"

         to="/not-found" />

     </Switch>

   </HashRouter>

  )

}

​

function Navigation () {

  return (

    <div className="nav">

     <NavLink to="/" activeClassName="active" exact>