Option B is a potential fix for the issue. Option B uses the data-sly-attribute block statement to add the href attribute to the anchor tag. The data-sly-attribute statement uses an expression to append ''.html'' to the item.path value. This way, the link will have the correct extension and will resolve to the corresponding page. Reference: https://experienceleague.adobe.com/docs/experience-manager-htl/using-htl/htl-block-statements.html?lang=en#data-sly-attribute

Backward Compatibility with the previous AEM Version is out of scope for the Pattern Detector tool, while doing an AEM upgrade. The Pattern Detector tool is a tool that scans an existing AEM code base and identifies patterns that are incompatible with AEM as a Cloud Service or newer versions of AEM on-premise. The tool does not check for backward compatibility with older versions of AEM, as this is not a requirement for upgrading. Reference: https://experienceleague.adobe.com/docs/experience-manager-cloud-service/moving/cloud-migration/pattern-detector.html?lang=en https://experienceleague.adobe.com/docs/experience-manager-cloud-service/moving/cloud-migration/pattern-detector/patterns-detected.html?lang=en

To debug a CQ HTML client library in the AEM author instance, you need to add the query parameter debugClientLibs set to true. This parameter instructs AEM to include additional debugging information for client libraries, making it easier to troubleshoot issues with JavaScript, CSS, and other assets.

Steps to enable client library debugging:

Open the AEM Page: Navigate to the AEM page where you want to debug the client libraries.

Append the Query Parameter: Add ?debugClientLibs=true to the URL. For example:

http://localhost:4502/content/we-retail/us/en.html?debugClientLibs=true

Reload the Page: Refresh the browser page. AEM will now include debugging information for client libraries.

This parameter helps in identifying issues with client library loading, dependencies, and other client-side resources.

Debugging Client Libraries in AEM

The MapTo() method is used to map a SPA component to an AEM component by specifying the sling:resourceType of the AEM component as an argument. The MapTo() method should be called on the SPA component and not on a string. The second argument of the MapTo() method is optional and can be used to provide an edit configuration for the SPA component.

When multiple configurations for the same PID are applicable, the configuration with the highest number of matching runmodes is applied. This is because the runmodes act as a filter to select the most specific configuration for a given environment. If there is a tie between two or more configurations with the same number of matching runmodes, the one that occurs first in the repository is applied. Reference: https://experienceleague.adobe.com/docs/experience-manager-65/deploying/configuring/configure-runmodes.html?lang=en#configuring-osgi-settings-per-runmode