Скачать или смотреть How to Fix undefined Cookie Value in Angular 6+ Using CookieService

Discover how to resolve the `undefined` cookie value issue in Angular 6+ applications using the `CookieService` package. Learn the essential steps to ensure your token is correctly retrieved.
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This video is based on the question https://stackoverflow.com/q/64511927/ asked by the user 'Yash' ( https://stackoverflow.com/u/14511268/ ) and on the answer https://stackoverflow.com/a/64512017/ provided by the user 'Célian Garcia' ( https://stackoverflow.com/u/5690223/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Resolving the undefined Cookie Value Issue in Angular 6+

When developing applications using Angular combined with Node.js, you may encounter some hiccups, particularly when handling cookies. One common problem is the situation where retrieving a cookie value returns undefined. This can halt your application functionality and lead to confusion when you expect the token to be present.

In this post, we'll tackle the issue you’re facing while working with the CookieService package in Angular. Let’s break down the issue and walk through the solution in a clear and step-by-step manner.

The Problem

As an Angular developer, you might be storing a token in a cookie using the CookieService. Here’s a snippet from your token.service.ts class:

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

You have implemented a method to get the token, and in your streams.component.ts, you're trying to fetch it during the component's initialization:

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

However, you’re encountering a problem: the value of this.token is undefined.

Understanding the Issue

The core of the problem lies in your GetToken() method. Although you’re attempting to retrieve the cookie value, the method is currently not returning anything, which leads to the undefined result.

When you call GetToken() in your ngOnInit() method, it’s executed and results in nothing being returned back to the this.token variable, hence the undefined output.

The Solution

To fix this, you simply need to adjust your GetToken() method to return the token that is fetched from the cookie. Here is the corrected code:

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

Updated Implementation Steps

Modify the GetToken Method: Change the GetToken() method in your token.service.ts file to ensure that it returns the token string.

Test the Changes: Once you have made the modifications, test your component again. The console log should now display the actual token value instead of undefined.

Final Checks

Ensure that you have correctly set the token earlier in the application using SetToken().

Check if the browser allows cookies and that there are no restrictions preventing cookie storage.

Conclusion

By simply updating the GetToken() method to include a return statement, you can resolve the undefined cookie value issue in your Angular application. This will allow you to correctly utilize your stored token throughout your components.

Don't forget—handling cookies in Angular efficiently can lead to a smoother user experience. Happy coding!