react-native-use-stylesheet v0.0.2

react-native-use-stylesheet

Simple responsive UI in React Native by extending StyleSheet with media query ability.

NOTE: This package is still on active development. Bugs and API changes is expected.

💍 Features

• Extend react-native built-in StyleSheet to accept media queries
• Utilize hooks for fast and accurate responsiveness
• Accept multiple queries, i.e. breakpoint, aspect ratio, platform and more
• Customizable breakpoint with context
• Built with Typescript

🟢 Why use us?

• Only want very basic media query support on top of react-native built-in API
• Only want a lightweight and less opinionated library
• In the midst of migrating to other UI framework, while still trying to push some responsive features

🔴 Why don't use us?

• Want a full fledge UI framework
• Looking for UI component library

NOTE: If you want a library for more complex use case, you should find another library or UI framework instead.

Installation

npm install react-native-use-stylesheet

or yarn:

yarn add react-native-use-stylesheet

Basic Usage

It will be the same as how you style with React Native built-in StyleSheet.

import { StyleSheet, useStyleSheet } from 'react-native-use-stylesheet';

export default function MyComponent() {
  const queryStyles = useStyleSheet(styles);

  // ... later in code use queryStyles.wrapper
}

const styles = StyleSheet.create({
  wrapper: {
    flexDirection: 'column',
    mediaQueries: [
      {
        query: { breakpoint: 'lg' },
        flexDirection: 'row', // Change direction for larger screen
      },
    ],
  },
});

If you need responsive UI support, you will need to use useStyleSheet hooks to achieve that.

StyleSheet

It acts as a drop-in replacement for React Native's built-in StyleSheet.

In fact, you don't need to change to use our StyleSheet and stay with original StyleSheet. However, we provide type support for the media query properties, hence, will recommend you to switch it.

How it works?

It wraps original StyleSheet under the hood and return the same API.

For StyleSheet, the only thing that changed is the .create() method. We allow media query by extending the NamedStyles and add a new mediaQueries property.

.create() Properties

It accepts the same styling object as StyleSheet.create() with extended properties:

PossibleQueryStyles

Example

mediaQueries property is an array of style with query, which allow you to conditionally provide styling with responsiveness.

You can put in multiple queries in the query properties, they will be treated with AND condition.

const styles = StyleSheet.create({
  wrapper: {
    backgroundColor: 'white',
    flexDirection: 'column',
    mediaQueries: [
      {
        // Change flex direction for larger screen
        query: { breakpoint: 'lg' },
        flexDirection: 'row',
      },
      {
        // Change backgroundColor for landscape and device with min pixel ratio of 2.5
        query: { orientation: 'landscape', minPixelRatio: 2.5 },
        backgroundColor: 'black',
      },
    ],
  },
});

Furthermore, you can use breakpoint shorthand for query, i.e.:

const styles = StyleSheet.create({
  wrapper: {
    color: 'white',
    mediaQueries: [
      {
        // Change text to red for medium breakpoint
        query: 'md',
        color: 'red',
      },
      {
        // Change text to blue for large breakpoint
        query: 'lg',
        color: 'blue',
      },
    ],
  },
});

This will not work out-of-the-box, in order to support the mediaQueries, you will need to compliment it with useStyleSheet hooks.

useStyleSheet

It is a React hook that takes in style object with query and will return merged style based on the media query and current device conditions.

Example

function MyComponent() {
  const queryStyles = useStyleSheet(styles);

  // Default style
  // queryStyles = { wrapper: { color: "white" } }

  // For medium breakpoint screen
  // queryStyles = { wrapper: { color: "red" } }

  // For large breakpoint screen
  // queryStyles = { wrapper: { color: "blue" } }
}

// Example styles
const styles = StyleSheet.create({
  wrapper: {
    color: 'white',
    mediaQueries: [
      {
        // Change text to red for medium breakpoint
        query: 'md',
        color: 'red',
      },
      {
        // Change text to blue for large breakpoint
        query: 'lg',
        color: 'blue',
      },
    ],
  },
});

As you can see from the above example, all styling in the mediaQueries array will be merged back to the base style based on the condition of the device and its media queries.

MediaQueryComponent

<MediaQueryComponent /> will only render the children when media queries pass in are true. The media query properties are PossibleQueryStyles.

Example

It is the same with query property in mediaQueries, you can place multiple conditions in the component. They will be treated with AND condition.

If the media queries are not matched, nothing will be rendered.

// Only shown when width is shorter than 600 and for ios/android device only
<MediaQueryComponent maxWidth={600} platform={['ios', 'android']}>
  <Children />
</MediaQueryComponent>

You can define a fallback component to render if the media query are not matched too.

// If the orientation is landscape, <Landscape /> component will be rendered,
// else if it is portrait, fallback <Portrait /> will be rendered.
<MediaQueryComponent orientation="landscape" fallback={<Portrait />}>
  <Landscape />
</MediaQueryComponent>

MediaQueryContext

It allows the user to modify the base media query configurations of this library through Reract context.

Base Configurations

{
  breakpoint: {
    sm: 400,
    md: 600,
    lg: 800,
  },
}

Example

import { MediaQueryContext } from 'react-native-use-stylesheet';

// Set a new breakpoints
const mediaQueryConfig = {
  breakpoint: {
    sm: 300,
    md: 600,
    lg: 900,
  },
};

// Wrap your app
<MediaQueryContext.Provider value={mediaQueryConfig}>
  <App />
</MediaQueryContext.Provider>;

NOTE: You don't need to use this context in your app, if you don't want to change the default configurations.

Contributing

See the contributing guide to learn how to contribute to the repository and the development workflow.

License

MIT