What is the function of Sass in app development?

Sass, which stands for Syntactically Awesome Style Sheets, is a preprocessor scripting language that extends CSS. Its primary function in app development is to enhance the capabilities of standard CSS by introducing features such as variables, nesting, mixins, and functions. This allows developers to write more maintainable and scalable stylesheets.

When using Sass, developers can define variables for colors, font sizes, and other style properties, which helps maintain consistency across the application. Nesting allows for a more hierarchical structure that mirrors the HTML structure, making the styles easier to read and manage. Moreover, mixins enable the reusability of style declarations, streamlining the writing process and reducing redundancy.

In contrast, while data manipulation and storage, backend logic control, and building user interfaces are essential parts of application development, they fall outside the specific functionalities provided by Sass, which is focused solely on enhancing styling in front-end development. Thus, the correct function of Sass in app development is as a tool for enhancing CSS with variables and nesting.