In today’s web ecosystem, websites or tools play a significant role, and their presentation layer is powered by using CSS (Cascading Style Sheets)....
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Why haven’t you mentioned StyledComponents?
It is a really great framework to work with CSS in JavaScript - also known as “CSS-in-JS” -, so it is worth checking it out particularly while in frontend development with React, for example, in my opinion. It allows you to write reusable components with CSS styles.