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Discover how to effectively preserve user authentication state in Vue.js applications using token-based authentication and state management.
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How to Save Logged In State on Page Restart in Vue.js

As a newcomer to single-page applications (SPAs) and modern frontend frameworks like Vue.js, you may encounter challenges related to user authentication. One common issue is losing the logged-in state when you refresh the page. If you've implemented a login and register form using Vue.js, this situation might frustrate you – especially if everything seems to work fine initially but fails to persist on page reload.

In this post, we will explore an effective solution to maintain the logged-in state across page refreshes using Vue.js, Laravel, and a state management library. Let's break it down into easily digestible sections.

Understanding the Problem

When you refresh a page in a single-page application (SPA), you may find that the user is no longer recognized as logged in. This happens because the application's state is lost upon refresh, unlike traditional Blade templates where the session state is maintained seamlessly.

The Challenge

Lost authentication state after a page refresh.

Difficulty in implementing effective token-based authentication in Vue.js with Laravel as the backend.

The Solution

To solve the problem of maintaining the logged-in state, we will leverage token-based authentication using Laravel's Sanctum or JWT (JSON Web Tokens). Below are the steps necessary to implement this solution:

Step 1: Use Token-Based Authentication

Setting Up Laravel Sanctum

Install Sanctum via Composer:

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Publish the Sanctum configuration:

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Configure the middleware in the HTTP kernel file.

Run the migration:

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Step 2: Making API Calls with Axios in Vue.js

Use the Axios library to perform HTTP requests to your Laravel backend for user authentication.

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Setting Up Vue Router Guards

Implement navigation guards in your Vue Router configuration to ensure that users can't access routes requiring authentication without a valid token.

[[See Video to Reveal this Text or Code Snippet]]

Step 4: Maintain Logged-In State

Whenever the application is loaded, check for the existence of the authentication token in the sessionStorage.

Based on its presence, redirect the user accordingly.

Conclusion

Using token-based authentication with session storage helps maintain the logged-in state in your Vue.js application, even after a page refresh. By implementing the above steps, you can ensure that your users have a seamless experience without losing their authentication status.

If you're new to these concepts, don’t hesitate to explore more about state management libraries such as Vuex or Pinia, and familiarize yourself with authentication strategies available in Laravel. Happy coding!