React Native Scaling

Scale react native style properties for different screen sizes.

Features

• Ease of use with minimum refactoring / editing required
• Global or specific scale value
• Uses PixelRatio.roundToNearestPixel(value) for pixel perfect UI
• Pure JS, lightweight, works on Android, iOS and Web

Installation

npm install react-native-scaling

Usage

import { Component } from 'react'
import { View, Text } from 'react-native'

/* This is all you need to do most of the time */
import { Stylesheet, Scaling } from 'react-native-scaling'

/* Use like regular StyleSheet from react-native */
const styles = StyleSheet.create({
	body: {
		...StyleSheet.absoluteFillObject,
		flexDirection: 'column',
		padding: 16
	},
	title: {
		fontSize: 24,
		fontWeight: '500'
	},
})

class TheComp extends Component {
	render() {
		return (
			<View style={styles.body}>
				<Text style={styles.title}>Hello World</Text>
			</View>
		)
	}
}

export default TheComp

API

StyleSheet

A wrapper around react native StyleSheet with same methods and properties like create(), flatten(), absoluteFillObject, etc. only create() method has added functionality for scaling.

StyleSheet.create(styleSheetObject:Object [, scale:Number])

The param scale is to specify scaling for the stylesheet, which is multiplied with all the layout style properties like width, fontSize, margin, etc. that use a number (not %) as value. if not specified, it uses global scale value which is 1 by default.

Scaling

This object is to configure the properties of the library.

Scaling.setGlobalScale(scale:Number)

Sets the global scale value to scale

Scaling.getGlobalScale():Number

Returns the global

Scaling.style(style:Object [, scale:Number]):Object

Computes a single style object with provided scale value (uses global scale value if value not provided). Can be used in a component's style prop. Example:

<View style={Scaling.style({fontSize:16})}>...</View>

Scaling.styles(styleSheet:ObjectOrArray [, scale:Number]):ObjectOrArray

Computes a set of styles in an object or array of styleSheet with provided scale value (uses global scale value if value not provided). Can be used in a component's style prop.

Example 1:

const styles = Scaling.styles({
	body: { padding:16 },
	title: { fontSize:24 }
})
// then use like...
// <View style={styles.body}>...</View>

Example 2:

<View style={Scaling.styles([styles.one,styles.two,{fontSize:16}])}>...</View>

License

The MIT License (MIT)

Copyright (c) 2020 Md. Naeemur Rahman (https://naeemur.github.io)

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.