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Auth0 is an identity platform that allows developers to add authentication and authorization to their applications with ease. With VueJs being a popular JavaScript framework used to build user interfaces, it's no surprise that Auth0 has developed a library for VueJs that makes it easy to secure your applications.

Auth0 provides a range of features such as single sign-on, social login, multi-factor authentication, and more. These features ensure that your application is secure and your users' identities are protected.

In this article, we'll look at how to use Auth0 with VueJs and how it can help secure your applications.

Getting Started

To get started, you'll need to create an account on Auth0 and set up your application. Once you've done that, you can install the Auth0 library for VueJs using npm.

npm install auth0-js

You can then initialize Auth0 in your application using the following code:

import auth0 from 'auth0-js';

const webAuth = new auth0.WebAuth({
domain: 'YOUR_AUTH0_DOMAIN',
clientID: 'YOUR_AUTH0_CLIENT_ID',
redirectUri: 'http://localhost:3000/callback',
responseType: 'token id_token',
scope: 'openid profile email'
});

This code initializes the Auth0 library and sets up the necessary parameters for authentication. You'll need to replace the values for the domain and clientID with your own values.

Logging In

To implement login in your VueJs application, you can use the loginWithRedirect() method provided by Auth0. This method redirects the user to the Auth0 login page, where they can enter their credentials.





This code sets up a button that triggers the login() method when clicked. The login() method calls the authorize() method provided by Auth0, which redirects the user to the login page.

Handling the Callback

After the user logs in, they are redirected back to your application with a token. You'll need to handle this token in order to allow the user to access your application.

To handle the token, you need to create a callback component that handles the token and saves it in local storage. Here's an example of what that might look like:





This code sets up a component that handles the token returned by Auth0. The parseHash() method looks for the token in the URL and saves it in local storage if it's found. The checkSession() method checks for an existing session and saves the token if it's found.

Securing Your Application

Once you've handled the token, you can use it to secure your application. You can retrieve the token from local storage and use it to authenticate your users.

Here's an example of how you might use the token to secure a component in your application:





In this code, we're checking for the presence of the access_token in local storage. If it's not found, we redirect the user to an unauthorized page.

Conclusion

Auth0 provides a simple way to secure your VueJs applications with authentication and authorization features. With Auth0, you can easily implement login, handle callbacks, and secure your application based on user authentication. By following the steps outlined in this article, you can protect your users' identities and ensure the security of your application.