In the 8.7 version of the Pega Platform, Theme Cosmos is the recommended architecture for new section-based applications. Theme Cosmos applications use the Cosmos library of UI components by default. For more information, see Theme Cosmos.

Customizable error messages

Pega Platform now includes an out-of-the-box error stream rule pyStatusResponse, which you can modify to adjust the messaging and appearance of error messages. Previously, similar customizations affected deployment files, which adversely impacted application updates. Now, you can safely control the text, style sheet, and visuals in your errors messages to better align with your company policy and branding. With this change, make sure you migrate all existing error message customizations to the new rule.

For more information, see Customizing error messages.

Handlebars library update

Pega Platform now uses the 4.7.7 version of the Handlebars template to generate client-side template files. The updated version, which is the latest available, introduces a wide variety of security fixes and new features that improve application reliability.

Improved confirmation modal dialog boxes

Confirmation modal dialog boxes (dirty forms) now support native web browser configuration to avoid potential issues with the default save option. Previously, when a user attempted to abandon unsaved work by triggering a local action, the default confirmation box appeared, but the save option might not have worked as intended.

For more information, see Configuring confirmation modal dialog boxes.