straż trasy w reakcji JS
<Route path="/login" component={SignIn} />
<Route path="/posts" render = {() => (auth ? (<Post />) : (<Redirect to="/login" />))}/>
coderyogi
<Route path="/login" component={SignIn} />
<Route path="/posts" render = {() => (auth ? (<Post />) : (<Redirect to="/login" />))}/>$ npm install react-router-guards