Sass VS emotion

SASS(.scss) [ https://sass-lang.com ]

Traditionally CSS lacked features such as variables, nesting, mixins, and functions. This was frustrating for Developers as it often led to CSS quickly becoming complex and cumbersome. In an attempt to make code easier and less repetitive CSS pre-processors were born. You would write CSS in the format the pre-processor understood and, at build time, you'd have some nice CSS. The most common pre-processors these days are Sass, Less, and Stylus. Any examples I give going forward will be about Sass as that's what I'm most familiar with.

CSS stands for Cascading Style Sheets, and is a scripting language used to style web pages. SCSS stands for Syntactically Awesome Style Sheet, and is a superset of CSS. You can think of SCSS as the more advanced version of CSS, which comes with several features that CSS does not support, such as the SCSS nested syntax, as shown below.

Scss

In the past, you’d need to rely on pre-processors such as SaSS or Less, but not anymore… Native CSS nesting has landed on all major modern browsers.

Sass is also a css preprocessor. Op is likely confused

sass -> An improvement over CSS. It provides nice features for managing CSS. good for mid-sized or even larger projects.

Sass (Syntactically Awesome Style Sheets) - A CSS preprocessor that simplifies and enhances your CSS workflow. Website: https://sass-lang.com/

Personally, my preference is Sass: I find that the mixins, partials, and operators are hugely useful when it comes to creating re-usable snippets of code for a design system. And, since it’s “just” a pre-processor and not a framework, it’s not opinionated in a design sense and there’s no default values (colors, spacing values, etc.) that will need to be overwritten.

Preprocessors: SSGs leverage preprocessors to streamline the development process. Preprocessors like SASS for CSS or Babel for JavaScript offer additional features and simplify code development.

emotion [ https://emotion.sh ]

dang, I never thought about this implication, and I googled the emotionjs repo there's a currently-active open issue regarding this https://github.com/emotion-js/emotion/issues/2928

Over my years of working with React, I’ve loved using CSS-in-JS libraries like Emotion and Styled-components. However, their inherent performance overhead from injecting CSS at runtime and their incompatibility with the latest Next.js features such as App Router and React Server Components (RSC) have always been a nagging issue for me.

An early difficulty I encountered was using UI component libraries like Mantine and Material UI in the new architecture. After looking through some GitHub issues, the culprit is Emotion, a package many component libraries rely on that does not support server rendering.

In general I recommend using styled-components or emotion. These directly attach CSS to your components in a scoped way so that your CSS files aren’t stepping on each other’s toes all the time and make sure styling is colocated with the component.

I ran into this problem as well. The root cause as I understand it is emotion: https://github.com/emotion-js/emotion/issues/2928

While integrating component libraries, they may not give you full control over the order in which styles are inserted. (Example issue).

Vanilla Extract (CSS Framework) (Alternative: Emotion)