Quickly Style React Native (and Reactjs) Components Via Props

React Quick Style Components

Quickly style react-native (and reactjs) components via props

Installation

React Native

yarn add react-quick-style-components

No linking required

React JS

Assuming you use create-react-app or expo web:

yarn add react-native-web react-quick-style-components

Main Idea

We usually style our component like this (inline or StyleSheet)

{
  width: 50,
  height: 50,
  margin: 10,
  backgroundColor: 'green',
  justifyContent: 'center',
  alignItems: 'center',
}

What if we can have a really quick way of styling by using prop. Like:

<Col
  width={50}
  height={50}
  margin={10}
  backgroundColor="green"
  justifyContent="center"
  alignItems="center"
/>

And with the advantage of boolean prop, we could get it even quicker (in terms of Coding convenience), like:

<Col
  width50
  height50
  margin10
  backgroundColor="green"
  middle // common global styleset, equal { justifyContent: 'center', alignItems: 'center'  }
/>

Performance Concern

• In the speed test, we compared it with normal View component, and styled-components. The test code is really simple, PR is welcome.

Best Practice

1. If you have more than 3 styled props, put it in StyleSheet. Too many styled props will not be convenient anymore.
2. Create your own common style objects to avoid repeating your self
3. Organize the components and keep them small and simple

Usage

Initial setup

import { StyleSheet } from 'react-native';
import { initQuickStyle } from 'react-quick-style-components/native';
import { FONT, COLOR } from './some-where/in/your/project'

// Use for quick prop like: colorMain, bgMain.

initQuickStyle.setMainColor(COLOR.MAIN);

// Use for default text style

initQuickStyle.setFontFamily({
  family: {
    regular: FONT.FAMILY.REGULAR,
    bold: FONT.FAMILY.BOLD,
    semiBold: FONT.FAMILY.SEMI_BOLD,
  },
  color: FONT.COLOR,
});

// Use for quick style, e.g: if you pass Style.create({ white: { color: 'white' } }). You will be able to use <Text white>Hello World!</Text>

const additionStyles = StyleSheet.create({
  shadow: {
    shadowColor: "#000",
    shadowOffset: {
      width: 0,
      height: 1,
    },
    shadowOpacity: 0.20,
    shadowRadius: 1.41,
    elevation: 2,
  },
});

initQuickStyle.setAdditionStyles(additionStyles);

Usage

Text

  import { Text } from 'react-quick-style-components/native';

  const App = () => (
    <Text colorMain bold fontsize20>Hello World!</Text>
  )

Col

  import { Col } from 'react-quick-style-components/native';

  const handlePress = () => alert('Hello World!');

  const App = () => (
    <Col flex1 bgMain onPress={handlePress}></Col>
  )

Row

  import { Col } from 'react-quick-style-components/native';

  const handlePress = () => alert('Hello World!');

  const App = () => (
    <Row flex1 bgMain onPress={handlePress}></Row>
  )

Styled Props

• Pretty much all the styled properties (take a look at ./utils/globalProps.ts line 22)
• Auto split number value from Boolean props

<Col
  width100
  zIndex1
  flex1
/>

Equal to

<Col
  width={100}
  zIndex={1}
  flex={1}
/>

• Common style sets (take a look at ./utils/commonStyle.ts)

Prop	Description
middle	Align items center (vertically and horizontally)
flex1	Flex 1
absolute	Position absolute
absoluteFill	Position absolute and full parent width, height
bgWhite	White background
colorWhite	White color text
colorMain	Main color text, (after run initQuickStyle.setMainColor)
bgMain	Main background color, (after run initQuickStyle.setMainColor)
bold	bold fontweight text
width100p	width 100%
height100p	height 100%
overflowH	overflow hidden

Style Hooks

Style Hooks is in easy way to transform value of styled props. For example when you want to normalize your font size

initQuickStyle.setStyleHooks({
  fontSize: (value) => {
    return normalize(value)
  },
});

After that, all of your <Text fontSize={xyz} /> will go thourgh that function and converted to a new value.

Col Component

• Flex direction column
• If onPress prop is given, it will operate like a TouchableOpacity (activeOpacity 0.9)
• onHoverStyle: it’s a web prop: Pass a object style here and it will apply when user hover over the component.
• useHoverNativeProps: apply the hover style without rerendering the component. credit to the guys here https://github.com/necolas/react-native-web/issues/205 , let me know if you have trouble using this prop

Example:

<Col
  middle
  style={styles.previewBox}
  useHoverNativeProps
  onHoverStyle={{ borderColor: COLOR.MAIN, borderWidth: 1, borderRadius: 4 }}
>
  {child}
</Col>

Row Component

• onPress work exactly like Col, infact it’s Col under the hood, so every props of Col can be used here.
• Flex direction row
• Align items center by default. If stretch props is specific (true), the children will have 100% height
• This component has responsive settings.

export interface Props {
  onRef?(): void,
  stretch?: boolean,
  responsive?: {
    sm?: string,
    md?: string,
    lg?: string,
    xl?: string,
    [breakpoint: string]: string,
  },
  [key: string]: any,
}

For example

<Row responsive={{ xs: '100%', sm: '1:1:2', md: '1:2:1' }}>
  <Col width100p height100>
    <Col margin10 flex1 backgroundColor="black" />
  </Col>
  <Col width100p height100>
    <Col margin10 flex1 backgroundColor="red" />
  </Col>
  <Col width100p height100>
    <Col margin10 flex1 backgroundColor="pink" />
  </Col>
</Row>

• width breakpoints follow Bootstrap CSS Web framework xs, sm, md, lg and xl

• <Row responsive={{ md: '1:.' }} />

  • every child will have flex 1 in md breakpoint

• <Row responsive={{ md: '1:2' }} />

  • only render two first child, with flex 1 and flex 2 in md breakpoint

• <Row responsive={{ md: '1:2', sm: '100%' }} />

  • same with the above, and in sm breakpoint all will have 100% width, and flex wrap style

Text Component

• define default font family and color with Text.setFontFamily

Prop	Description
bold	Change font to Bold font if that font was declared at initQuickStyle.setAdditionStyles
semiBold	Change font to Semi Bold font if that font was declared at initQuickStyle.setAdditionStyles
light	The same
medium	The same
extraBold	The same
black	The same

Example <Text light bold />

Download Details:

Author: lequanghuylc

Source Code: https://github.com/lequanghuylc/react-quick-style-components

#react-native #react #mobile-apps

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