@emotion/use-insertion-effect-with-fallbacks

What is @emotion/use-insertion-effect-with-fallbacks?

@emotion/use-insertion-effect-with-fallbacks is a utility package designed to handle CSS insertion in React applications. It leverages the `useInsertionEffect` hook when available, and falls back to other methods when it is not, ensuring compatibility across different React versions.

What are @emotion/use-insertion-effect-with-fallbacks's main functionalities?

CSS Insertion with useInsertionEffect

This feature allows you to insert CSS into the document head using the `useInsertionEffect` hook when available. It ensures that styles are applied correctly and cleaned up when the component unmounts.

import { useInsertionEffectWithFallbacks } from '@emotion/use-insertion-effect-with-fallbacks';

const useStyles = () => {
  useInsertionEffectWithFallbacks(() => {
    const style = document.createElement('style');
    style.textContent = '.my-class { color: red; }';
    document.head.appendChild(style);
    return () => {
      document.head.removeChild(style);
    };
  }, []);
};

const MyComponent = () => {
  useStyles();
  return <div className="my-class">Hello World</div>;
};

Fallback to useLayoutEffect

If `useInsertionEffect` is not available, the package falls back to using `useLayoutEffect`. This ensures compatibility with older versions of React that do not support `useInsertionEffect`.

import { useInsertionEffectWithFallbacks } from '@emotion/use-insertion-effect-with-fallbacks';

const useStyles = () => {
  useInsertionEffectWithFallbacks(() => {
    const style = document.createElement('style');
    style.textContent = '.my-class { color: blue; }';
    document.head.appendChild(style);
    return () => {
      document.head.removeChild(style);
    };
  }, []);
};

const MyComponent = () => {
  useStyles();
  return <div className="my-class">Hello World</div>;
};

Other packages similar to @emotion/use-insertion-effect-with-fallbacks

styled-components

styled-components is a popular library for styling React components using tagged template literals. It provides a way to write CSS directly within JavaScript and offers features like theming and automatic critical CSS. Unlike @emotion/use-insertion-effect-with-fallbacks, styled-components does not focus on the insertion effect but provides a comprehensive styling solution.

emotion

Emotion is a library designed for writing CSS styles with JavaScript. It offers both a CSS-in-JS approach and a styled-components-like API. Emotion provides more extensive styling capabilities compared to @emotion/use-insertion-effect-with-fallbacks, which is more focused on the insertion effect and compatibility across React versions.

aphrodite

Aphrodite is a library for styling React components with JavaScript. It allows you to define styles in JavaScript and apply them to components. Aphrodite focuses on performance and critical CSS, similar to @emotion/use-insertion-effect-with-fallbacks, but does not specifically address the useInsertionEffect hook.

README

@emotion/use-insertion-effect-with-fallbacks