When user is not logged in redirect to login. Reactjs [duplicate]

See this answer https://stackoverflow.com/a/43171515/208079. Perhaps someone with more rep than me can mark this as a duplicate.

The basic idea is to wrap routes that require authentication with a custom component (PrivateRoute in the example below). PrivateRoute will use some logic to determine if the user is authenticated and then either; allow the requested route to render, or redirect to the login page.

This is also described in the react-router training docs at this link https://reacttraining.com/react-router/web/example/auth-workflow.

Here is an implementation using the above as inspiration.

In App.js (or where your routing is happening)

import React, { Component } from 'react'import { BrowserRouter as Router, Route } from 'react-router-dom'import PrivateRoute from './PrivateRoute'import MyComponent from '../src/MyComponent'import MyLoginForm from '../src/MyLoginForm'<Router>  <Route path="/login" component={MyLoginForm} />  <PrivateRoute path="/onlyAuthorizedAllowedHere/" component={MyComponent} /></Router>

And the PrivateRoute Component

// This is used to determine if a user is authenticated and// if they are allowed to visit the page they navigated to.// If they are: they proceed to the page// If not: they are redirected to the login page.import React from 'react'import AuthService from './Services/AuthService'import { Redirect, Route } from 'react-router-dom'const PrivateRoute = ({ component: Component, ...rest }) => {  // Add your own authentication on the below line.  const isLoggedIn = AuthService.isLoggedIn()  return (    <Route      {...rest}      render={props =>        isLoggedIn ? (          <Component {...props} />        ) : (          <Redirect to={{ pathname: '/login', state: { from: props.location } }} />        )      }    />  )}export default PrivateRoute