emotion

What is emotion?

Emotion is a performant and flexible CSS-in-JS library that allows you to style applications quickly and efficiently with JavaScript. It provides powerful and flexible tools for writing CSS styles with JavaScript, including support for styled components, CSS prop, and keyframes for animations.

What are emotion's main functionalities?

Styled Components

Styled components allow you to create React components with styles attached to them. This makes it easy to manage styles in a modular and reusable way.

const Button = styled.button`
  color: hotpink;
`;

<Button>Click me</Button>

CSS Prop

The CSS prop allows you to style elements using a prop directly in your JSX. This is useful for applying styles conditionally or dynamically.

<div css={{ color: 'hotpink' }}>Hello World</div>

Keyframes for Animations

Emotion provides support for keyframes, allowing you to define animations in your JavaScript code. This makes it easy to create complex animations and apply them to your components.

import { keyframes } from '@emotion/react';

const bounce = keyframes`
  from, 20%, 53%, 80%, to {
    transform: translate3d(0,0,0);
  }
  40%, 43% {
    transform: translate3d(0, -30px, 0);
  }
  70% {
    transform: translate3d(0, -15px, 0);
  }
  90% {
    transform: translate3d(0,-4px,0);
  }
`;

const BouncingDiv = styled.div`
  animation: ${bounce} 1s ease infinite;
`;

<BouncingDiv>Bounce!</BouncingDiv>

Other packages similar to emotion

styled-components

Styled-components is another popular CSS-in-JS library that allows you to write plain CSS in your JavaScript. It offers a similar API to Emotion's styled components and is widely used in the React community.

aphrodite

Aphrodite is a CSS-in-JS library developed by Khan Academy. It focuses on performance and provides a straightforward API for defining styles in JavaScript. It is less feature-rich compared to Emotion but is known for its simplicity and performance.

jss

JSS is a library for generating CSS from JavaScript. It provides a powerful and flexible API for defining styles and supports various plugins for additional functionality. JSS is highly customizable and can be used with various frameworks, not just React.

README

emotion

The Next Generation of CSS-in-JS

emotion is a high performance, lightweight css-in-js library. The core idea comes from Sunil Pai’s glam library and its philosophy is laid out here. The basic idea is simple. You shouldn’t have to sacrifice runtime performance for good developer experience when writing CSS. emotion minimizes the runtime cost of css-in-js dramatically by parsing your styles with PostCSS during compilation instead of at runtime.

-- Introduction Article

• Install

• Demos

  • emotion website [Demo Here]
  • next-hnpwa-guide-kit [Demo Here]
  • open a PR and add yours!

• Benchmarks

• Extract Mode

• Inline Mode

• API

  • css
  • styled
  • css prop
  • composes property
  • keyframes
  • fontFace
  • injectGlobal
  • vue styled

• Usage with CSS Modules

• Usage with babel-macros