Скачать или смотреть How to Fix Cookie Issues with www and Non-www Domains

Learn how to ensure your cookies work seamlessly across `www` and non-`www` domains with js-cookie for age verification.
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This video is based on the question https://stackoverflow.com/q/73968181/ asked by the user 'Branos' ( https://stackoverflow.com/u/18743000/ ) and on the answer https://stackoverflow.com/a/73968205/ provided by the user 'cactusboat' ( https://stackoverflow.com/u/2910473/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Fix Cookie Issues with www and Non-www Domains

When building websites that require user verification, such as age gates, managing cookies effectively is crucial. A common problem arises when users set a cookie on a domain with a www prefix but later return to the same site without the www prefix. This can result in the age verification modal appearing again since the cookie isn't detected.

In this post, we’ll explore how to resolve this issue using the js-cookie library, ensuring that cookies set on one version of your domain are accessible on the other.

Understanding the Problem

Imagine you have a website that’s accessible via both www.example.com and example.com. When a user first visits your site, they may see an age gate asking them to confirm their age. If they pass the verification, a cookie is set to indicate that they are of valid age.

The issue:
If the user returns to your site using the non-www version (or vice versa), the cookie will not be found, causing the age gate to show up again. This can be frustrating and create a poor user experience.

The Solution

To ensure that your cookies work across both www and non-www domains, you need to set the cookie for the whole domain. Here’s how:

Step 1: Modify Your Cookie Set Code

You can use the domain option provided by the js-cookie library when setting the cookie. This ensures that the cookie is available on all subdomains. Here’s the modified code snippet for setting the cookie:

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

Step 2: Update Your Age Gate Implementation

Here’s how the updated JavaScript code looks with the new cookie settings:

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

Explanation of Changes

Cookie Domain: By specifying domain: '.example.com', you allow the cookie to be accessible from both www.example.com and example.com.

Expiration Duration: The expires attribute remains the same, meaning your validAge cookie will still be valid for 90 days after the user confirms their age.

Conclusion

By implementing these changes, you can ensure a seamless user experience regardless of how users access your site. The age verification process will work smoothly, maintaining user preference across different domain versions.

Now your age gate can function correctly, and users won’t be repeatedly prompted for verification if they have already proven their age before.

Remember that managing cookies correctly is essential for user satisfaction and can significantly impact how users interact with your site.