React Redux: Token Authentication example with JWT & Axios

In this tutorial, we’re gonna build a React Redux Token Authentication example with JWT, LocalStorage, React Router, Axios and Bootstrap. I will show you:

• JWT Authentication Flow for User Signup & User Login
• Project Structure for React Redux JWT Authentication, LocalStorage, Router, Axios
• Working with Redux Actions, Reducers, Store for Application state
• Creating React Components with Form Validation
• React Components for accessing protected Resources (Authorization)
• Dynamic Navigation Bar in React App

Related Posts:
– In-depth Introduction to JWT-JSON Web Token
– React.js CRUD example to consume Web API
– React (with Redux) CRUD example to consume Web API
– React File Upload with Axios and Progress Bar to Rest API
– React JWT Authentication (without Redux) example

Fullstack (JWT Authentication & Authorization example):
– React + Spring Boot
– React + Node.js Express + MySQL/PostgreSQL
– React + Node.js Express + MongoDB

The example using React Hooks:
React Hooks + Redux: JWT Authentication & Authorization example

Overview of React Redux JWT Authentication example

We will build a React application in that:

• There are Login/Logout, Signup pages.
• Form data will be validated by front-end before being sent to back-end.
• Depending on User’s roles (admin, moderator, user), Navigation Bar changes its items automatically.

Here are the screenshots:
– Signup Page:

– Signup failed:

– Form Validation Support:

– Login Page:

– Profile Page (for successful Login):

– For Moderator account login, the navigation bar will change by authorities:

– Check Browser Local Storage:

– Check State in Redux using redux-devtools-extension:

If you want to add refresh token, please visit:
React + Redux: Refresh Token with Axios and JWT example

User Registration and User Login Flow

For JWT Authentication, we’re gonna call 2 endpoints:

• POST api/auth/signup for User Registration
• POST api/auth/signin for User Login

The following flow shows you an overview of Requests and Responses that React Client will make or receive. This React Client must add a JWT to HTTP Header before sending request to protected resources.

You can find step by step to implement these back-end servers in following tutorial:

• Spring Boot JWT Authentication with Spring Security, MySQL
• Spring Boot JWT Authentication with Spring Security, PostgreSQL
• Spring Boot JWT Authentication with Spring Security, MongoDB
• Node.js JWT Authentication & Authorization with MySQL
• Node.js JWT Authentication & Authorization with MongoDB
• Node.js JWT Authentication & Authorization with PostgreSQL

React Component Diagram with Redux, Router, Axios

Let’s look at the diagram below.

– The App component is a container with React Router. It gets app state from Redux Store. Then the navbar now can display based on the state.

– Login & Register components have form for data submission (with support of react-validation library). They dispatch auth actions (login/register) to Redux Thunk Middleware which uses auth.service to call API.

– auth.service methods use axios to make HTTP requests. Its also store or get JWT from Browser Local Storage inside these methods.

– Home component is public for all visitor.

– Profile component displays user information after the login action is successful.

– BoardUser, BoardModerator, BoardAdmin components will be displayed in navbar by state user.roles. In these components, we use user.service to access protected resources from Web API.

– user.service uses auth-header() helper function to add JWT to HTTP header. auth-header() returns an object containing the JWT of the currently logged in user from Local Storage.

Technology

We’re gonna use these modules:

• React 16
• react-redux 7.2.1
• redux 4.0.5
• redux-thunk 2.3.0
• react-router-dom 5
• axios 0.19.2
• react-validation 3.0.7
• Bootstrap 4
• validator 13.1.1

Project Structure

This is folders & files structure for this React application:

With the explanation in diagram above, you can understand the project structure easily.

But I need to say some things about Redux elements that we’re gonna use:
– actions folder contains all the action creators (auth.js for register & login, message.js for response message from server).
– reducers folder contains all the reducers, each reducer updates a different part of the application state corresponding to dispatched action.

Setup React.js Project

Open cmd at the folder you want to save Project folder, run command:
npx create-react-app react-redux-jwt-auth

Then add Router Dom Module for later use: npm install react-router-dom.

Import Bootstrap

Run command: npm install bootstrap.

Open src/App.js and modify the code inside it as following-

import React, { Component } from "react";
import "bootstrap/dist/css/bootstrap.min.css";

class App extends Component {
  render() {
    // ...
  }
}

export default App;

Create Services

We’re gonna create two services in src/services folder:

---

services

auth-header.js

auth.service.js (Authentication service)

user.service.js (Data service)

---

Before working with these services, we need to install Axios with command:
npm install axios

Authentication service

The service uses Axios for HTTP requests and Local Storage for user information & JWT.
It provides following important methods:

• login(): POST {username, password} & save JWT to Local Storage
• logout(): remove JWT from Local Storage
• register(): POST {username, email, password}

import axios from "axios";

const API_URL = "http://localhost:8080/api/auth/";

class AuthService {
  login(username, password) {
    return axios
      .post(API_URL + "signin", { username, password })
      .then((response) => {
        if (response.data.accessToken) {
          localStorage.setItem("user", JSON.stringify(response.data));
        }

        return response.data;
      });
  }

  logout() {
    localStorage.removeItem("user");
  }

  register(username, email, password) {
    return axios.post(API_URL + "signup", {
      username,
      email,
      password,
    });
  }
}

export default new AuthService();

Data service

We also have methods for retrieving data from server. In the case we access protected resources, the HTTP request needs Authorization header.

Let’s create a helper function called authHeader() inside auth-header.js:

export default function authHeader() {
  const user = JSON.parse(localStorage.getItem('user'));

  if (user && user.accessToken) {
    return { Authorization: 'Bearer ' + user.accessToken };
  } else {
    return {};
  }
}

The code above checks Local Storage for user item. If there is a logged in user with accessToken (JWT), return HTTP Authorization header. Otherwise, return an empty object.

---

Note: For Node.js Express back-end, please use x-access-token header like this:

export default function authHeader() {
  const user = JSON.parse(localStorage.getItem('user'));

  if (user && user.accessToken) {
    // for Node.js Express back-end
    return { 'x-access-token': user.accessToken };
  } else {
    return {};
  }
}

---

Now we define a service for accessing data in user.service.js:

import axios from 'axios';
import authHeader from './auth-header';

const API_URL = 'http://localhost:8080/api/test/';

class UserService {
  getPublicContent() {
    return axios.get(API_URL + 'all');
  }

  getUserBoard() {
    return axios.get(API_URL + 'user', { headers: authHeader() });
  }

  getModeratorBoard() {
    return axios.get(API_URL + 'mod', { headers: authHeader() });
  }

  getAdminBoard() {
    return axios.get(API_URL + 'admin', { headers: authHeader() });
  }
}

export default new UserService();

You can see that we add a HTTP header with the help of authHeader() function when requesting authorized resource.

Create Redux Actions

We’re gonna create two kind of actions in src/actions folder:

---

actions

types.js

auth.js (register/login/logout actions)

message.js (set/clear message actions)

---

Action Types

First we defined some string constant that indicates the type of action being performed.

actions/type.js

export const REGISTER_SUCCESS = "REGISTER_SUCCESS";
export const REGISTER_FAIL = "REGISTER_FAIL";
export const LOGIN_SUCCESS = "LOGIN_SUCCESS";
export const LOGIN_FAIL = "LOGIN_FAIL";
export const LOGOUT = "LOGOUT";

export const SET_MESSAGE = "SET_MESSAGE";
export const CLEAR_MESSAGE = "CLEAR_MESSAGE";

Message Actions Creator

This Redux action creator is for actions related to messages (notifications) from APIs.

actions/message.js

import { SET_MESSAGE, CLEAR_MESSAGE } from "./types";

export const setMessage = (message) => ({
  type: SET_MESSAGE,
  payload: message,
});

export const clearMessage = () => ({
  type: CLEAR_MESSAGE,
});

Auth Actions Creator

This is creator for actions related to authentication. We’re gonna import AuthService to make asynchronous HTTP requests with trigger one or more dispatch in the result.

– register()

• calls the AuthService.register(username, email, password)
• dispatch REGISTER_SUCCESS and SET_MESSAGE if successful
• dispatch REGISTER_FAIL and SET_MESSAGE if failed

– login()

• calls the AuthService.login(username, password)
• dispatch LOGIN_SUCCESS and SET_MESSAGE if successful
• dispatch LOGIN_FAIL and SET_MESSAGE if failed

Both action creators return a Promise for Components using them.

actions/auth.js

import {
  REGISTER_SUCCESS,
  REGISTER_FAIL,
  LOGIN_SUCCESS,
  LOGIN_FAIL,
  LOGOUT,
  SET_MESSAGE,
} from "./types";

import AuthService from "../services/auth.service";

export const register = (username, email, password) => (dispatch) => {
  return AuthService.register(username, email, password).then(
    (response) => {
      dispatch({
        type: REGISTER_SUCCESS,
      });

      dispatch({
        type: SET_MESSAGE,
        payload: response.data.message,
      });

      return Promise.resolve();
    },
    (error) => {
      const message =
        (error.response &&
          error.response.data &&
          error.response.data.message) ||
        error.message ||
        error.toString();

      dispatch({
        type: REGISTER_FAIL,
      });

      dispatch({
        type: SET_MESSAGE,
        payload: message,
      });

      return Promise.reject();
    }
  );
};

export const login = (username, password) => (dispatch) => {
  return AuthService.login(username, password).then(
    (data) => {
      dispatch({
        type: LOGIN_SUCCESS,
        payload: { user: data },
      });

      return Promise.resolve();
    },
    (error) => {
      const message =
        (error.response &&
          error.response.data &&
          error.response.data.message) ||
        error.message ||
        error.toString();

      dispatch({
        type: LOGIN_FAIL,
      });

      dispatch({
        type: SET_MESSAGE,
        payload: message,
      });

      return Promise.reject();
    }
  );
};

export const logout = () => (dispatch) => {
  AuthService.logout();

  dispatch({
    type: LOGOUT,
  });
};

Create Redux Reducers

There will be two reducers in src/reducers folder, each reducer updates a different part of the state corresponding to dispatched Redux actions.

---

reducers

index.js

auth.js (register/login/logout)

message.js (set/clear message)

---

Message Reducer

This reducer updates message state when message action is dispatched from anywhere in the application.

reducers/message.js

import { SET_MESSAGE, CLEAR_MESSAGE } from "../actions/types";

const initialState = {};

export default function (state = initialState, action) {
  const { type, payload } = action;

  switch (type) {
    case SET_MESSAGE:
      return { message: payload };

    case CLEAR_MESSAGE:
      return { message: "" };

    default:
      return state;
  }
}

Auth Reducer

The Auth reducer will update the isLoggedIn and user state of the application.

reducers/auth.js

import {
  REGISTER_SUCCESS,
  REGISTER_FAIL,
  LOGIN_SUCCESS,
  LOGIN_FAIL,
  LOGOUT,
} from "../actions/types";

const user = JSON.parse(localStorage.getItem("user"));

const initialState = user
  ? { isLoggedIn: true, user }
  : { isLoggedIn: false, user: null };

export default function (state = initialState, action) {
  const { type, payload } = action;

  switch (type) {
    case REGISTER_SUCCESS:
      return {
        ...state,
        isLoggedIn: false,
      };
    case REGISTER_FAIL:
      return {
        ...state,
        isLoggedIn: false,
      };
    case LOGIN_SUCCESS:
      return {
        ...state,
        isLoggedIn: true,
        user: payload.user,
      };
    case LOGIN_FAIL:
      return {
        ...state,
        isLoggedIn: false,
        user: null,
      };
    case LOGOUT:
      return {
        ...state,
        isLoggedIn: false,
        user: null,
      };
    default:
      return state;
  }
}

Combine Reducers

Because we only have a single store in a Redux application. We use reducer composition instead of many stores to split data handling logic.

reducers/index.js

import { combineReducers } from "redux";
import auth from "./auth";
import message from "./message";

export default combineReducers({
  auth,
  message,
});

Create Redux Store

This Store will bring Actions and Reducers together and hold the Application state.

Now we need to install Redux, Thunk Middleware and Redux Devtool Extension.
Run the command:

npm install redux redux-thunk
npm install --save-dev redux-devtools-extension

In the previous section, we used combineReducers() to combine 2 reducers into one. Let’s import it, and pass it to createStore():

store.js

import { createStore, applyMiddleware } from "redux";
import { composeWithDevTools } from "redux-devtools-extension";
import thunk from "redux-thunk";
import rootReducer from "./reducers";

const middleware = [thunk];

const store = createStore(
  rootReducer,
  composeWithDevTools(applyMiddleware(...middleware))
);

export default store;

Create React Components for Authentication

In src folder, create new folder named components and add several files as following:

---

components

login.component.js

register.component.js

profile.component.js

---

Form Validation overview

Now we need a library for Form validation, so we’re gonna add react-validation library to our project.
Run the command: npm install react-validation validator

To use react-validation in this example, you need to import following items:

import Form from "react-validation/build/form";
import Input from "react-validation/build/input";
import CheckButton from "react-validation/build/button";

import { isEmail } from "validator";

We also use isEmail() function from validator to verify email.

This is how we put them in render() method with validations attribute:

const required = value => {
  if (!value) {
    return (
      <div className="alert alert-danger" role="alert">
        This field is required!
      </div>
    );
  }
};

const email = value => {
  if (!isEmail(value)) {
    return (
      <div className="alert alert-danger" role="alert">
        This is not a valid email.
      </div>
    );
  }
};

render() {
  return (
  ...
    <Form
      onSubmit={this.handleLogin}
      ref={c => {this.form = c;}}
    >
      ...
      <Input
        type="text"
        className="form-control"
        ...
        validations={[required, email]}
      />

      <CheckButton
        style={{ display: "none" }}
        ref={c => {this.checkBtn = c;}}
      />
    </Form>
  ...
  );
}

We’re gonna call Form validateAll() method to check validation functions in validations. Then CheckButton helps us to verify if the form validation is successful or not. So this button will not display on the form.

this.form.validateAll();

if (this.checkBtn.context._errors.length === 0) {
  // do something when no error
}

Another way to implement Form Validation:
React Form Validation example with Formik and Yup

Login Page

This page has a Form with username & password.
– We’re gonna verify them as required field.
– If the verification is ok, we dispatch login action, then direct user to Profile page: this.props.history.push("/profile");.

For the application state, we use Redux connect() function with mapStateToProps:
– redirect user to Profile page by checking isLoggedIn
– show response message with message

login.component.js

import React, { Component } from "react";
import { Redirect } from 'react-router-dom';

import Form from "react-validation/build/form";
import Input from "react-validation/build/input";
import CheckButton from "react-validation/build/button";

import { connect } from "react-redux";
import { login } from "../actions/auth";

const required = (value) => {
  if (!value) {
    return (
      <div className="alert alert-danger" role="alert">
        This field is required!
      </div>
    );
  }
};

class Login extends Component {
  constructor(props) {
    super(props);
    this.handleLogin = this.handleLogin.bind(this);
    this.onChangeUsername = this.onChangeUsername.bind(this);
    this.onChangePassword = this.onChangePassword.bind(this);

    this.state = {
      username: "",
      password: "",
      loading: false,
    };
  }

  onChangeUsername(e) {
    this.setState({
      username: e.target.value,
    });
  }

  onChangePassword(e) {
    this.setState({
      password: e.target.value,
    });
  }

  handleLogin(e) {
    e.preventDefault();

    this.setState({
      loading: true,
    });

    this.form.validateAll();

    const { dispatch, history } = this.props;

    if (this.checkBtn.context._errors.length === 0) {
      dispatch(login(this.state.username, this.state.password))
        .then(() => {
          history.push("/profile");
          window.location.reload();
        })
        .catch(() => {
          this.setState({
            loading: false
          });
        });
    } else {
      this.setState({
        loading: false,
      });
    }
  }

  render() {
    const { isLoggedIn, message } = this.props;

    if (isLoggedIn) {
      return <Redirect to="/profile" />;
    }

    return (
      <div className="col-md-12">
        <div className="card card-container">
          <img
            src="//ssl.gstatic.com/accounts/ui/avatar_2x.png"
            alt="profile-img"
            className="profile-img-card"
          />

          <Form
            onSubmit={this.handleLogin}
            ref={(c) => {
              this.form = c;
            }}
          >
            <div className="form-group">
              <label htmlFor="username">Username</label>
              <Input
                type="text"
                className="form-control"
                name="username"
                value={this.state.username}
                onChange={this.onChangeUsername}
                validations={[required]}
              />
            </div>

            <div className="form-group">
              <label htmlFor="password">Password</label>
              <Input
                type="password"
                className="form-control"
                name="password"
                value={this.state.password}
                onChange={this.onChangePassword}
                validations={[required]}
              />
            </div>

            <div className="form-group">
              <button
                className="btn btn-primary btn-block"
                disabled={this.state.loading}
              >
                {this.state.loading && (
                  <span className="spinner-border spinner-border-sm"></span>
                )}
                <span>Login</span>
              </button>
            </div>

            {message && (
              <div className="form-group">
                <div className="alert alert-danger" role="alert">
                  {message}
                </div>
              </div>
            )}
            <CheckButton
              style={{ display: "none" }}
              ref={(c) => {
                this.checkBtn = c;
              }}
            />
          </Form>
        </div>
      </div>
    );
  }
}

function mapStateToProps(state) {
  const { isLoggedIn } = state.auth;
  const { message } = state.message;
  return {
    isLoggedIn,
    message
  };
}

export default connect(mapStateToProps)(Login);

Register Page

This page is similar to Login Page.

For Form Validation, there are some more details:

• username: required, between 3 and 20 characters
• email: required, email format
• password: required, between 6 and 40 characters

We’re gonna dispatch register action and show response message (successful or error).

register.component.js

import React, { Component } from "react";
import Form from "react-validation/build/form";
import Input from "react-validation/build/input";
import CheckButton from "react-validation/build/button";
import { isEmail } from "validator";

import { connect } from "react-redux";
import { register } from "../actions/auth";

const required = (value) => {
  if (!value) {
    return (
      <div className="alert alert-danger" role="alert">
        This field is required!
      </div>
    );
  }
};

const email = (value) => {
  if (!isEmail(value)) {
    return (
      <div className="alert alert-danger" role="alert">
        This is not a valid email.
      </div>
    );
  }
};

const vusername = (value) => {
  if (value.length < 3 || value.length > 20) {
    return (
      <div className="alert alert-danger" role="alert">
        The username must be between 3 and 20 characters.
      </div>
    );
  }
};

const vpassword = (value) => {
  if (value.length < 6 || value.length > 40) {
    return (
      <div className="alert alert-danger" role="alert">
        The password must be between 6 and 40 characters.
      </div>
    );
  }
};

class Register extends Component {
  constructor(props) {
    super(props);
    this.handleRegister = this.handleRegister.bind(this);
    this.onChangeUsername = this.onChangeUsername.bind(this);
    this.onChangeEmail = this.onChangeEmail.bind(this);
    this.onChangePassword = this.onChangePassword.bind(this);

    this.state = {
      username: "",
      email: "",
      password: "",
      successful: false,
    };
  }

  onChangeUsername(e) {
    this.setState({
      username: e.target.value,
    });
  }

  onChangeEmail(e) {
    this.setState({
      email: e.target.value,
    });
  }

  onChangePassword(e) {
    this.setState({
      password: e.target.value,
    });
  }

  handleRegister(e) {
    e.preventDefault();

    this.setState({
      successful: false,
    });

    this.form.validateAll();

    if (this.checkBtn.context._errors.length === 0) {
      this.props
        .dispatch(
          register(this.state.username, this.state.email, this.state.password)
        )
        .then(() => {
          this.setState({
            successful: true,
          });
        })
        .catch(() => {
          this.setState({
            successful: false,
          });
        });
    }
  }

  render() {
    const { message } = this.props;

    return (
      <div className="col-md-12">
        <div className="card card-container">
          <img
            src="//ssl.gstatic.com/accounts/ui/avatar_2x.png"
            alt="profile-img"
            className="profile-img-card"
          />

          <Form
            onSubmit={this.handleRegister}
            ref={(c) => {
              this.form = c;
            }}
          >
            {!this.state.successful && (
              <div>
                <div className="form-group">
                  <label htmlFor="username">Username</label>
                  <Input
                    type="text"
                    className="form-control"
                    name="username"
                    value={this.state.username}
                    onChange={this.onChangeUsername}
                    validations={[required, vusername]}
                  />
                </div>

                <div className="form-group">
                  <label htmlFor="email">Email</label>
                  <Input
                    type="text"
                    className="form-control"
                    name="email"
                    value={this.state.email}
                    onChange={this.onChangeEmail}
                    validations={[required, email]}
                  />
                </div>

                <div className="form-group">
                  <label htmlFor="password">Password</label>
                  <Input
                    type="password"
                    className="form-control"
                    name="password"
                    value={this.state.password}
                    onChange={this.onChangePassword}
                    validations={[required, vpassword]}
                  />
                </div>

                <div className="form-group">
                  <button className="btn btn-primary btn-block">Sign Up</button>
                </div>
              </div>
            )}

            {message && (
              <div className="form-group">
                <div className={ this.state.successful ? "alert alert-success" : "alert alert-danger" } role="alert">
                  {message}
                </div>
              </div>
            )}
            <CheckButton
              style={{ display: "none" }}
              ref={(c) => {
                this.checkBtn = c;
              }}
            />
          </Form>
        </div>
      </div>
    );
  }
}

function mapStateToProps(state) {
  const { message } = state.message;
  return {
    message,
  };
}

export default connect(mapStateToProps)(Register);

Profile Page

This page gets current User from Local Storage by getting user in the application state and show user information (with token).

profile.component.js

import React, { Component } from "react";
import { Redirect } from 'react-router-dom';
import { connect } from "react-redux";

class Profile extends Component {

  render() {
    const { user: currentUser } = this.props;

    if (!currentUser) {
      return <Redirect to="/login" />;
    }

    return (
      <div className="container">
        <header className="jumbotron">
          <h3>
            <strong>{currentUser.username}</strong> Profile
          </h3>
        </header>
        <p>
          <strong>Token:</strong> {currentUser.accessToken.substring(0, 20)} ...{" "}
          {currentUser.accessToken.substr(currentUser.accessToken.length - 20)}
        </p>
        <p>
          <strong>Id:</strong> {currentUser.id}
        </p>
        <p>
          <strong>Email:</strong> {currentUser.email}
        </p>
        <strong>Authorities:</strong>
        <ul>
          {currentUser.roles &&
            currentUser.roles.map((role, index) => <li key={index}>{role}</li>)}
        </ul>
      </div>
    );
  }
}

function mapStateToProps(state) {
  const { user } = state.auth;
  return {
    user,
  };
}

export default connect(mapStateToProps)(Profile);

Create React Components for accessing Resources

These components will use UserService to request data from API.

---

components

home.component.js

board-user.component.js

board-moderator.component.js

board-admin.component.js

---

Home Page

This is a public page that shows public content. People don’t need to log in to view this page.

home.component.js

import React, { Component } from "react";

import UserService from "../services/user.service";

export default class Home extends Component {
  constructor(props) {
    super(props);

    this.state = {
      content: ""
    };
  }

  componentDidMount() {
    UserService.getPublicContent().then(
      response => {
        this.setState({
          content: response.data
        });
      },
      error => {
        this.setState({
          content:
            (error.response && error.response.data) ||
            error.message ||
            error.toString()
        });
      }
    );
  }

  render() {
    return (
      <div className="container">
        <header className="jumbotron">
          <h3>{this.state.content}</h3>
        </header>
      </div>
    );
  }
}

Role-based Pages

We’re gonna have 3 pages for accessing protected data:

• BoardUser page calls UserService.getUserBoard()
• BoardModerator page calls UserService.getModeratorBoard()
• BoardAdmin page calls UserService.getAdminBoard()

I will show you User Page for example, other Pages are similar to this Page.

board-user.component.js

import React, { Component } from "react";

import UserService from "../services/user.service";

export default class BoardUser extends Component {
  constructor(props) {
    super(props);

    this.state = {
      content: ""
    };
  }

  componentDidMount() {
    UserService.getUserBoard().then(
      response => {
        this.setState({
          content: response.data
        });
      },
      error => {
        this.setState({
          content:
            (error.response &&
              error.response.data &&
              error.response.data.message) ||
            error.message ||
            error.toString()
        });
      }
    );
  }

  render() {
    return (
      <div className="container">
        <header className="jumbotron">
          <h3>{this.state.content}</h3>
        </header>
      </div>
    );
  }
}

You can simplify import statement with:
Absolute Import in React

Add Navbar and define Routes

Create React Router History

This is a custom history object used by the React Router.

helpers/history.js

import { createBrowserHistory } from "history";

export const history = createBrowserHistory();

Modify App Component

Now we add a navigation bar in App component. This is the root container for our application.
The navbar dynamically changes by login status and current User’s roles.

• Home: always
• Login & Sign Up: if user hasn’t signed in yet
• User: there is user value in the application state
• Board Moderator: roles includes ROLE_MODERATOR
• Board Admin: roles includes ROLE_ADMIN

src/App.js

import React, { Component } from "react";
import { connect } from "react-redux";
import { Router, Switch, Route, Link } from "react-router-dom";

import "bootstrap/dist/css/bootstrap.min.css";
import "./App.css";

import Login from "./components/login.component";
import Register from "./components/register.component";
import Home from "./components/home.component";
import Profile from "./components/profile.component";
import BoardUser from "./components/board-user.component";
import BoardModerator from "./components/board-moderator.component";
import BoardAdmin from "./components/board-admin.component";

import { logout } from "./actions/auth";
import { clearMessage } from "./actions/message";

import { history } from './helpers/history';

class App extends Component {
  constructor(props) {
    super(props);
    this.logOut = this.logOut.bind(this);

    this.state = {
      showModeratorBoard: false,
      showAdminBoard: false,
      currentUser: undefined,
    };

    history.listen((location) => {
      props.dispatch(clearMessage()); // clear message when changing location
    });
  }

  componentDidMount() {
    const user = this.props.user;

    if (user) {
      this.setState({
        currentUser: user,
        showModeratorBoard: user.roles.includes("ROLE_MODERATOR"),
        showAdminBoard: user.roles.includes("ROLE_ADMIN"),
      });
    }
  }

  logOut() {
    this.props.dispatch(logout());
  }

  render() {
    const { currentUser, showModeratorBoard, showAdminBoard } = this.state;

    return (
      <Router history={history}>
        <div>
          <nav className="navbar navbar-expand navbar-dark bg-dark">
            <Link to={"/"} className="navbar-brand">
              bezKoder
            </Link>
            <div className="navbar-nav mr-auto">
              <li className="nav-item">
                <Link to={"/home"} className="nav-link">
                  Home
                </Link>
              </li>

              {showModeratorBoard && (
                <li className="nav-item">
                  <Link to={"/mod"} className="nav-link">
                    Moderator Board
                  </Link>
                </li>
              )}

              {showAdminBoard && (
                <li className="nav-item">
                  <Link to={"/admin"} className="nav-link">
                    Admin Board
                  </Link>
                </li>
              )}

              {currentUser && (
                <li className="nav-item">
                  <Link to={"/user"} className="nav-link">
                    User
                  </Link>
                </li>
              )}
            </div>

            {currentUser ? (
              <div className="navbar-nav ml-auto">
                <li className="nav-item">
                  <Link to={"/profile"} className="nav-link">
                    {currentUser.username}
                  </Link>
                </li>
                <li className="nav-item">
                  <a href="/login" className="nav-link" onClick={this.logOut}>
                    LogOut
                  </a>
                </li>
              </div>
            ) : (
              <div className="navbar-nav ml-auto">
                <li className="nav-item">
                  <Link to={"/login"} className="nav-link">
                    Login
                  </Link>
                </li>

                <li className="nav-item">
                  <Link to={"/register"} className="nav-link">
                    Sign Up
                  </Link>
                </li>
              </div>
            )}
          </nav>

          <div className="container mt-3">
            <Switch>
              <Route exact path={["/", "/home"]} component={Home} />
              <Route exact path="/login" component={Login} />
              <Route exact path="/register" component={Register} />
              <Route exact path="/profile" component={Profile} />
              <Route path="/user" component={BoardUser} />
              <Route path="/mod" component={BoardModerator} />
              <Route path="/admin" component={BoardAdmin} />
            </Switch>
          </div>
        </div>
      </Router>
    );
  }
}

function mapStateToProps(state) {
  const { user } = state.auth;
  return {
    user,
  };
}

export default connect(mapStateToProps)(App);

Logout when the Token is expired

There are two ways. For more details, please visit:
React – How to Logout when JWT Token is expired

Add CSS style for React Components

Open src/App.css and write some CSS code as following:

label {
  display: block;
  margin-top: 10px;
}

.card-container.card {
  max-width: 350px !important;
  padding: 40px 40px;
}

.card {
  background-color: #f7f7f7;
  padding: 20px 25px 30px;
  margin: 0 auto 25px;
  margin-top: 50px;
  -moz-border-radius: 2px;
  -webkit-border-radius: 2px;
  border-radius: 2px;
  -moz-box-shadow: 0px 2px 2px rgba(0, 0, 0, 0.3);
  -webkit-box-shadow: 0px 2px 2px rgba(0, 0, 0, 0.3);
  box-shadow: 0px 2px 2px rgba(0, 0, 0, 0.3);
}

.profile-img-card {
  width: 96px;
  height: 96px;
  margin: 0 auto 10px;
  display: block;
  -moz-border-radius: 50%;
  -webkit-border-radius: 50%;
  border-radius: 50%;
}

Configure Port for React JWT Auth Client with Web API

Because most of HTTP Server use CORS configuration that accepts resource sharing retricted to some sites or ports, so we also need to configure port for our App.

In project folder, create .env file with following content:

PORT=8081

Now we’ve set our app running at port 8081. You will need to do this work if you use one of following Servers:

• Spring Boot JWT Authentication with Spring Security, MySQL
• Spring Boot JWT Authentication with Spring Security, PostgreSQL
• Spring Boot JWT Authentication with Spring Security, MongoDB
• Node.js JWT Authentication & Authorization with MySQL
• Node.js JWT Authentication & Authorization with MongoDB
• Node.js JWT Authentication & Authorization with PostgreSQL

Conclusion

Congratulation!

Today we’ve done so many interesting things. I hope you understand the overall layers of our React Redux JWT Authentication App using LocalStorage, React Router, Thunk Middleware, Axios, Bootstrap. Now you can apply it in your project at ease.

You should continue to check if Token is expired and logout:
React – How to Logout when JWT Token is expired

If you don’t want to use React Redux for this example, you can find the implementation at:
React JWT Authentication (without Redux) example

Happy learning, see you again!

If you want to use React Hooks for this example, you can find the implementation at:
– React Redux Login, Logout, Registration example with Hooks
– React Hooks: JWT Authentication (without Redux) example

Or add refresh token:
React + Redux: Refresh Token with Axios and JWT example

Further Reading

• React Router Guide
• React Components
• Redux Tutorials
• https://www.npmjs.com/package/react-validation
• https://www.npmjs.com/package/validator
• In-depth Introduction to JWT-JSON Web Token

Fullstack CRUD:
– React + Spring Boot + MySQL
– React + Spring Boot + PostgreSQL
– React + Spring Boot + MongoDB
– React + Node.js Express + MySQL
– React + Node.js Express + PostgreSQL
– React.js + Node.js Express + MongoDB
– React + Django

Another way to implement Form Validation:
React Form Validation example with Formik and Yup

Source Code

You can find the complete source code for this example on Github.