Sass is a very mature, stable, and powerful professional grade CSS extension language. It provides a superset of CSS with features like nesting, variables, imports and mixins.
Tooling | vue.framework.dev
Use TypeScript as your preprocessor. Write type‑safe, locally scoped classes, variables and themes, then generate static CSS files at build time.
Next Generation Frontend Tooling
Storybook is a development environment for UI components. It allows you to browse a component library, view the different states of each component, and interactively develop and test components.