Sass vs CSS-in-JS in React: Which is Better?

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

Sass is a preprocessor that extends CSS with features like variables and nesting, while CSS-in-JS allows you to write CSS directly in your JavaScript files, often using libraries like styled-components or Emotion.

Which one is better for large React applications?

It depends on your team's preferences and project requirements. Sass can be more organized for large stylesheets, while CSS-in-JS offers dynamic styling and scoped styles, which can be beneficial in large applications.

Can you give me an example of using CSS-in-JS in a React component?

Sure! Here's a simple example using styled-components:

import styled from 'styled-components';

const Button = styled.button`
  background: blue;
  color: white;
  padding: 10px;
`;

const App = () => <Button>Click Me</Button>;

What are the performance implications of using CSS-in-JS?

CSS-in-JS can introduce some runtime overhead, but it often results in smaller bundle sizes and better performance due to scoped styles. It's essential to profile your application to understand the impact.