Скачать или смотреть Solving the User Interface Challenge: Hide Toolbar on Login in Angular 11 without Refreshing

Learn how to hide the toolbar on the login component in Angular 11 without requiring a page refresh. We break down the solution step-by-step to help improve your user experience.
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This video is based on the question https://stackoverflow.com/q/66526347/ asked by the user 'Skander Kratou' ( https://stackoverflow.com/u/13521870/ ) and on the answer https://stackoverflow.com/a/66651663/ provided by the user 'Skander Kratou' ( https://stackoverflow.com/u/13521870/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Solving the User Interface Challenge: Hide Toolbar on Login in Angular 11 without Refreshing

If you're building a web application using Angular 11, you may have faced a scenario where the toolbar or navigation bar continues to be visible even after logging out and returning to the login page. This can lead to a confusing user experience, as the toolbar should ideally disappear when the user navigates back to the login view. Fortunately, there's a straightforward solution to this issue that doesn't require page refreshes.

Understanding the Problem

In many web applications, it's common to show a toolbar only when the user is logged in. Typically, the presence of a valid user token is used to determine the user's authentication status. However, after logging out and attempting to log back in, the toolbar remains visible due to how Angular processes changes in the application.

Key Points

User Token Management: The toolbar's visibility relies on the presence of a user token, which is often stored in local storage.

State Update Requirement: Angular needs to detect changes in the user state instantly, without the need for a full page refresh.

Solution Overview

To resolve this problem, we will enhance our authentication service to properly update the user token within local storage when a user logs in. We will then make sure to subscribe to this change in the component responsible for displaying the toolbar.

Step 1: Update the Authentication Service

The first step is to modify the AccountService to save the user token upon successful login. This ensures that the application knows when the user is logged in.

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

Step 2: Subscribe to User Changes

Next, we will subscribe to the user observable in our main component to reactively manage the toolbar's visibility.

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

Step 3: Modify the Template

Finally, we need to update the template file to reflect changes based on the user object. Instead of checking for userToken, we will check for user directly.

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

Conclusion

By implementing these changes, you can effectively manage the visibility of the toolbar based on the user's authentication state without the need for refreshing the page. This improvement significantly enhances the user experience by providing a cleaner and more dynamic interface.

We hope this guide helps you tackle similar challenges in your Angular applications. If you encounter any further issues or have questions, feel free to reach out or explore additional resources!