How to Troubleshoot ‘this._config is undefined’ on the storefront in Shopware 6

When attempting to open an Ajax modal window on your Shopware 6 site, you may encounter an error message in the browser console stating “this._config is undefined.” This error disrupts the functionality of the modal window and may hinder the user experience on your storefront.

Solution

The root cause of this error often lies in the usage of deprecated selectors to open Ajax modal windows. Shopware 6 has evolved, and deprecated selectors are no longer supported. To resolve this issue, you need to update the selector used to open AjaxModal.

Step-by-Step Solution:

1. Identify Deprecated Selector:

    As per the error message and your observation, the deprecated selector being used to open AjaxModal is [data-bs-toggle="modal"][data-url].

2. Update Selector:

    Replace the deprecated selector with the updated one: [data-ajax-modal][data-url].

3. Implementation in Code (PHP and Symfony):

•     Locate the part of your code where the modal window is triggered.
•     Update the selector to [data-ajax-modal][data-url].
•     Ensure that the JavaScript code handling the modal window opening is updated accordingly.

4. Testing:

•     After making the code changes, thoroughly test the modal window functionality on your Shopware 6 site.
•     Verify that the error message “this._config is undefined” no longer appears in the browser console.
•    Confirm that the modal window opens as expected when triggered.

Conclusion

By following these steps and updating the deprecated selector, you should be able to resolve the “this._config is undefined” error and restore the proper functionality of Ajax modal windows on your Shopware 6 site. If you encounter any further issues or need assistance, feel free to reach out to our Shopware expert for personalised assistance.