@rebass/components

Create consistent styled-system based React UI components (formerly system-components)

Built with styled-system, with support for styled-components & emotion

import system from '@rebass/components'

// creates a Box with default props tied to your theme
const Box = system({
  p: 2,
  bg: 'blue'
}, 'space', 'color')

Or, to use with emotion:

import system from '@rebass/components/emotion'

Usage

To create a styled-component with default props that hook into styled-system props, pass a plain object as the first argument to the system function and pass the names of the styled-system functions as arguments after.

const Card = system({
  px: 2,
  py: 3,
  border: '1px solid',
  borderColor: 'lightGray',
  borderRadius: 2
}, 'space', 'borders', 'borderColor', 'borderRadius')

@rebass/components automatically adds prop type definitions and removes style props from the underlying HTML element.

See the styled-system docs for a complete list of the available style functions.

Add style props without defaultProps

@rebass/components can also be created with styled-system props without defining defaultProps.

const Box = system(
  'space',
  'width',
  'color'
)

This allows for style props to be passed to the component instance:

<Box
  width={1/2}
  px={3}
  py={4}
  bg='blue'
/>

Using custom functions

Custom style functions can be passed as an argument.

const Box = system(
  props => ({
    height: props.height
  })
)

Changing the underlying HTML element

@rebass/components default to using a <div> as the HTML element. To change the HTML element use the is prop.

const Heading = system({
  is: 'h2',
  m: 0,
  fontSize: 6
}, 'space', 'fontSize')

Since is is a prop, it can also be passed to the element when used. This is useful for one-off changes to ensure semantic markup.

<Heading is='h1'>
  Hello
</Heading>

Extending components

To extend another component, use the extend prop in your component definition.

const Text = system({
  fontSize: 2,
}, 'fontSize')

const Bold = system({
  extend: Text,
  fontWeight: 'bold'
}, 'fontWeight')

CSS prop

To add one-off custom CSS to any @rebass/component, use the css prop.

<Heading css='opacity:0.75;'>
  Hello
</Heading>

The css prop can also accept object literal syntax.

<Heading
  css={{
    opacity: 3/4
  }}>
  Hello
</Heading>

MIT License

License

rebassjs/components

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