What are Mixins in UI design?

Mixins in UI design refer to reusable style patterns that allow developers to apply consistent typography, borders, backgrounds, and other stylistic elements across various components. By defining these styles in a mixin, designers can ensure that similar visual features are maintained throughout the application, promoting a cohesive look and feel. This strategy not only saves time but also makes it easier to manage and update styles in one centralized location, enhancing efficiency and maintainability in the design process.

The other choices represent different aspects of design and application development. Grouping UI components without implementing any styles does not encapsulate the purpose of mixins, which is focused on style definitions. While specific functions for application programming relate more to backend logic and functionality, predetermined templates for dashboard layouts are more about layout structuring rather than style definition. Hence, the first choice accurately captures the essence of what mixins are intended for in UI design.