In this tutorial, we will learn how to build a full stack Node.js Express + Vue.js Authentication example. The back-end server uses Node.js Express with jsonwebtoken for JWT authentication and Sequelize for interacting with MySQL database & Authorization. The front-end will be created with Vue and Vuex. We’ll also use
vee-validate to perform Form validation and
vue-fontawesome for make our UI more comfortable to view.
- JWT (JSON Web Token)
- Node.js Express Vue.js Authentication example
- Flow for User Registration and User Login
- Back-end with Node.js Express & Sequelize
- Front-end with Vue.js & Vuex
- Further Reading
JWT (JSON Web Token)
Comparing with Session-based Authentication that need to store Session on Cookie, the big advantage of Token-based Authentication is that we store the JSON Web Token (JWT) on Client side: Local Storage for Browser, Keychain for IOS and SharedPreferences for Android… So we don’t need to build another backend project that supports Native Apps or an additional Authentication module for Native App users.
There are three important parts of a JWT: Header, Payload, Signature. Together they are combined to a standard structure:
The Client typically attaches JWT in x-access-token header:
For more details, you can visit:
In-depth Introduction to JWT-JSON Web Token
Node.js Express Vue.js Authentication example
It will be a full stack, with Node.js Express for back-end and Vue.js for front-end. The access is verified by JWT Authentication.
- User can signup new account, login with username & password.
- Authorization by the role of the User (admin, moderator, user)
The images below shows screenshots of our Vue.js App.
– Anyone can access a public page before logging in:
– A new User can signup:
– Now User can Login. If it’s succesful, App directs the User to Profile page:
– UI for admin role
– If a User who doesn’t have Admin role tries to access Admin/Moderator Board page:
This is full Node.js Express + Vue.js Authentication demo Video (with form validation, check signup username/email duplicates, test authorization with 3 roles: Admin, Moderator, User):
[coming soon on Youtube…]
Flow for User Registration and User Login
The diagram shows flow of User Registration, User Login and Authorization process.
We have 2 endpoints for authentication:
api/auth/signupfor User Registration
api/auth/signinfor User Login
A legal JWT must be added to HTTP x-access-token Header if Client accesses protected resources.
Back-end with Node.js Express & Sequelize
Our Node.js Express Application can be summarized in the diagram below:
Via Express routes, HTTP request that matches a route will be checked by CORS Middleware before coming to Security layer.
Security layer includes:
- JWT Authentication Middleware: verify SignUp, verify token
- Authorization Middleware: check User’s roles with record in database
If these middlewares throw any error, a message will be sent as HTTP response.
Controllers interact with MySQL Database via Sequelize and send HTTP response (token, user information, data based on roles…) to client.
- Express 4.17.1
- bcryptjs 2.4.3
- jsonwebtoken 8.5.1
- Sequelize 5.21.3
This is directory structure for our Node.js Express application:
- configure MySQL database & Sequelize
- configure Auth Key
- auth.routes.js: POST signup & signin
- user.routes.js: GET public & protected resources
- verifySignUp.js: check duplicate Username or Email
- authJwt.js: verify Token, check User roles in database
- auth.controller.js: handle signup & signin actions
- user.controller.js: return public & protected content
– models for Sequelize Models
– server.js: import and initialize neccesary modules and routes, listen for connections.
You can find step by step to implement this Node.js App in the post:
Node.js – JWT Authentication & Authorization with JSONWebToken example
Front-end with Vue.js & Vuex
Our Vue.js App can be summarized in component diagram below:
Let me explain it right now.
App component is a container with
Router. It gets app state from Vuex
store/auth. Then the navbar now can display based on the state.
App component also passes state to its child components.
Register components have form for submission data (with support of
vee-validate). We call Vuex store
dispatch() function to make login/register actions.
– Our Vuex actions call
auth.service methods which use
axios to make HTTP requests. We also store or get JWT from Browser Local Storage inside these methods.
Home component is public for all visitor.
Profile component get
user data from its parent component and display user information.
BoardAdmin components will be displayed by Vuex state
user.roles. In these components, we use
user.service to get protected resources from API.
auth-header() helper function to add JWT to HTTP Authorization header.
auth-header() returns an object containing the JWT of the currently logged in user from Local Storage.
– vue: 2.6.10
– vue-router: 3.0.3
– vuex: 3.0.1
– axios: 0.19.0
– vee-validate: 2.2.15
– bootstrap: 4.3.1
– vue-fontawesome: 0.1.7
The structure of Vue front-end project is simple:
You can understand it properly without any explanation.
You can find step by step to implement this Vue – Vuex App in the post:
Vue.js JWT Authentication with Vuex and Vue Router
- Vuex Guide
- In-depth Introduction to JWT-JSON Web Token
Now we have an overview of Node.js Express + Vue.js Authentication example using JWT and Vuex along with flow for signup/login actions.
We also take a look at Node.js Express server architecture for JWT Authentication using jsonwebtoken & Sequelize, as well as Vue.js project structure for building a front-end app working with JWT.
Next tutorials will show you more details about how to implement this interesting system:
– Back-end: Node.js – JWT Authentication & Authorization with JSONWebToken example
– Front-end: Vue.js JWT Authentication with Vuex and Vue Router
This Vue Client also works well with back-end in the post:
Node.js + MongoDB: User Authentication & Authorization with JWT
Happy learning, see you again!