CSS / UI framework

UI framework / CSS frameworks

in the frontend development they are have many way to styles your web application for example pure CSS style, SCSS is a pre processing style with CSS, Tailwind, Bootstraps, Material UI, ChakraUI, AntUI and other more.

CSS Framework 

A CSS framework is a prepped and ready-to-use CSS library (Cascading Style Sheets). The stylesheets collection makes the job of a UI developer easier. 

React UI framework

React UI framework refers to the Javascript library or collection of pre-built React-based components that can be used by developers to quickly create user interfaces (UI) for their applications