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https://github.com/kristerkari/react-native-css-modules

Style React Native components using CSS, PostCSS, Sass, Less or Stylus.
https://github.com/kristerkari/react-native-css-modules

css css-modules css-variables less media-queries postcss react-native sass stylus viewport-units

Last synced: 24 days ago
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Style React Native components using CSS, PostCSS, Sass, Less or Stylus.

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# React Native CSS modules



Style React Native components using CSS, PostCSS, Sass, Less or Stylus.



**Quick links:** **[Features](#features)** • **[Documentation](https://github.com/kristerkari/react-native-css-modules#documentation)** • **[Example Apps](#example-apps)** • **[Development](#development)** • **[FAQ](docs/faq.md#frequently-asked-questions)**






## Features



- :tada: You can share your CSS modules between React Native and React Web by using `className` property in React Native, and by using [React Native for Web](https://github.com/necolas/react-native-web) for the browser.

- :ok_hand: Supports [CSS](https://github.com/kristerkari/react-native-css-transformer), [PostCSS](https://github.com/kristerkari/react-native-postcss-transformer), [Sass](https://github.com/kristerkari/react-native-sass-transformer), [Less](https://github.com/kristerkari/react-native-less-transformer) and [Stylus](https://github.com/kristerkari/react-native-stylus-transformer).

- :fire: CSS Hot loading (live reloading).

- :computer: Supports responsive CSS features: [CSS Media Queries](https://alligator.io/css/media-queries/) and [CSS Viewport Units](https://alligator.io/css/viewport-units/).

- :sparkles: Supports [CSS variables](https://alligator.io/css/css-variables/).

- :globe_with_meridians: [Platform-specific extensions](https://facebook.github.io/react-native/docs/platform-specific-code.html#platform-specific-extensions) for CSS, e.g. `styles.ios.css`, `styles.android.css`, `styles.native.css`.

- :tophat: Support for `styleName` attribute that allows you to use CSS class names as strings, and allows hyphens in class names (like the [className property](https://reactjs.org/docs/faq-styling.html#how-do-i-add-css-classes-to-components) in Web React).

- :package: Suppports Typescript with [React Native type definitions that add support for React Native CSS modules](https://github.com/kristerkari/react-native-types-for-css-modules) and [CSS, Sass, LESS, PostCSS, or Stylus transformers that automatically create typings for your CSS files](https://github.com/kristerkari/react-native-typed-sass-transformer).

- :mag: Keep your CSS error free using [a custom stylelint config for React Native CSS modules](https://github.com/kristerkari/stylelint-config-react-native-css-modules)



## Examples



Using React Native CSS modules works almost the same way as using CSS modules with a Web React project, but there are some limitations. There is no support complex CSS selectors. Only simple CSS class selector (e.g. `.myClass`) is supported. React Native also only supports a subset of browser's CSS properties for styling.



For more info about the differences between using CSS modules in Web and React Native, have a look at [this explanation in the FAQ](docs/faq.md#what-is-the-difference-with-regular-css-and-react-natives-css).



#### Basic example using Sass



**App.scss**



```scss

.container {

  flex: 1;

  justify-content: center;

  align-items: center;

}



.blue {

  color: blue;

}



.blueText {

  @extend .blue;

  font-size: 18px;

}

```



**App.js**



```jsx

import React from "react";

import { Text, View } from "react-native";

import styles from "./App.scss";



const App = () => (

  

    Blue text

  

);

export default App;

```



#### CSS media queries and CSS viewport units



If you need CSS media queries or CSS viewport units, please have a look at the [responsive CSS features setup guide](docs/setup-responsive.md).



```css

.wrapper {

  height: 10vh;

  width: 10vw;

}



@media (min-width: 800px) {

  .wrapper {

    height: 20vh;

    width: 20vw;

  }

}

```



#### CSS variables



CSS variables are not supported by default, but you can add support for them by using [PostCSS](https://postcss.org/) and [postcss-css-variables](https://github.com/MadLittleMods/postcss-css-variables#readme) plugin.



Please have a look at the [CSS variables setup guide](docs/setup-css-variables.md).



```css

:root {

  --text-color: blue;

}



.blue {

  color: var(--text-color);

}

```



#### Exporting variables from CSS to Javascript



You might also need to share you variables from a CSS/Sass/Less/Stylus file to Javascript. To do that you can use the `:export` keyword:



**colors.scss**



```

$grey: #ccc;



:export {

  grey: $grey;

}

```



**App.js**



```jsx

import React from "react";

import { Text, View } from "react-native";

import colors from "./colors.scss";

import styles from "./App.scss";



const App = () => (

  

    

      Grey text

    

  

);

export default App;

```



## Example Apps



Have a look at the example apps to see how you can use CSS modules for both React Native and Web using the same code.



- **[Example app](https://github.com/kristerkari/react-native-css-modules-example)**

- **[CSS Media Queries example app](https://github.com/kristerkari/react-native-css-modules-with-media-queries-example)**

- **[CSS Viewport Units example app](https://github.com/kristerkari/react-native-css-modules-with-viewport-units-example)**

- **[Example app with styleName syntax](https://github.com/kristerkari/react-native-css-modules-stylename-example)**

- **[Typescript example app](https://github.com/kristerkari/react-native-css-modules-with-typescript-example)**



## Documentation



#### :books: Setup



- **[Setup CSS modules with CSS support](docs/setup-css.md)**

- **[Setup CSS modules with PostCSS support](docs/setup-postcss.md)**

- **[Setup CSS modules with Sass support](docs/setup-sass.md)**

- **[Setup CSS modules with Less support](docs/setup-less.md)**

- **[Setup CSS modules with Stylus support](docs/setup-stylus.md)**

- **[Setup CSS modules with Responsive CSS support (CSS Media Queries & CSS Viewport Units)](docs/setup-responsive.md)**

- **[Setup CSS modules with CSS variables support](docs/setup-css-variables.md)**

- **[Setup CSS modules with Typescript support](docs/setup-typescript.md)**

- **[Setup CSS modules with styleName attribute (use className as a string)](docs/setup-stylename.md)**

- **[Use CSS and Sass in the same project](docs/multiple-transformers.md)**

- **[Setup recommended linting (ESLint & stylelint)](docs/setup-linting.md)**

- **[Setup browser compatibility](docs/web-compatibility.md)**



#### :books: Other documentation



- **[Frequently Asked Questions](docs/faq.md)**

- **[Stylelint config for React Native CSS modules](https://github.com/kristerkari/stylelint-config-react-native-css-modules)**

- **[List of CSS properties supported by React Native (out of date)](https://github.com/vhpoet/react-native-styling-cheat-sheet)**



## Development



To see which new features are being planned and what is in progress, please have a look at [the development board](https://github.com/kristerkari/react-native-css-modules/projects/1).



If you want to suggest a new feature or report a bug, please open a new issue.



---



## Special thanks



The idea for React Native CSS modules comes from these projects that have made a lot of work for supporting CSS and CSS modules in React Native: [css-to-react-native](https://github.com/styled-components/css-to-react-native) and [react-native-sass-classname](https://github.com/daniloster/react-native-sass-classname). A big thanks to them!



---



### License



[MIT](/LICENSE)