CSS-in-JS vs CSS Preprocessors: Which is Better?

What are the main differences between CSS-in-JS and CSS preprocessors?

CSS-in-JS allows you to write CSS directly in your JavaScript files, while CSS preprocessors like SASS or LESS extend CSS with features like variables and nesting. CSS-in-JS is often used in React applications for scoped styles, whereas preprocessors are more traditional and can be used with any HTML.

What are the advantages of using CSS-in-JS?

CSS-in-JS offers advantages like scoped styles, dynamic styling based on props, and easier maintenance since styles are co-located with components. It also helps in avoiding class name collisions.

Are there any downsides to using CSS-in-JS?

Yes, some downsides include potential performance issues due to runtime style generation, larger bundle sizes, and a steeper learning curve for those unfamiliar with the approach.

When should I choose CSS preprocessors instead?

You might choose CSS preprocessors when working on larger projects that require a more traditional approach, or when you need features like mixins and functions that preprocessors provide. They can also be beneficial for teams already familiar with them.