React-native-utils-toolkit NPM

react-native-utils-toolkit

Provide solutions to make your app flexible for different screen sizes, different devices. When developing with react-native, you need to manually adjust your app to look great on a variety of different screen sizes. This package provides some simple tooling to make your scaling a whole lot easier.

Getting started

    yarn add react-native-utils-toolkit

    npm i react-native-utils-toolkit

RN Version < 0.60

    react-native link react-native-utils-toolkit

Run IOS

    cd ios && pod install
    react-native run-ios

Run Android

    react-native run-android

Jest setup

    jest.mock('react-native-utils-toolkit', () => {
        const UtilsToolkit = require('react-native-utils-toolkit/mock');
        return UtilsToolkit;
    });

Documents

API	Type	Description
scale	Function	Will return a linear scaled result of the provided size
fontScale	Function	Will return a linear scaled result of the font size provided
deviceInch	Number	Inch of device
hasNotch	Boolean	Tells if the device has a notch
isAndroid	Boolean	Tells if the device is Android operating system
isIOS	Boolean	Tells if the device is IOS operating system
isSmallDevice	Boolean	Tells the device has a screen size smaller than 4.8 inches
isTablet	Boolean	Tells if the device is a tablet
width	Number	Screen width
height	Number	Screen height
useDeviceOrientation	Hooks API	Device orientation detection
useBackHandler	Hooks API	Detects hardware button presses for back navigation
useAppState	Hooks API	Can tell you if the app is in the foreground or background, and notify you when the state changes

Source code demo

react-native-template-components A beautiful template for React Native.

Demo

npm.io

Usage

    import React from 'react';
    import {SafeAreaView, ScrollView, StyleSheet, Text, View} from 'react-native';
    import {useBackHandler, useAppState, useDetectDevice, useScale, useDeviceOrientation} from 'react-native-utils-toolkit';
    
    const {scale, fontScale} = useScale;
    const {
        deviceInch,
        hasNotch,
        height,
        width,
        isAndroid,
        isIOS,
        isSmallDevice,
        isTablet,
    } = useDetectDevice;

    const App = () => {
        const deviceOrientation = useDeviceOrientation();
        console.log('deviceOrientation', deviceOrientation); // PORTRAIT or LANDSCAPE

        useBackHandler(() => {
            console.log('On goback');
        }, []);

        useAppState(state => {
            console.log('App State', state);
        }, []);
        
        return (
            <ScrollView>
                <SafeAreaView style={styles.container}>
                    <Text style={styles.fontScale}>Device width: {width}</Text>
                    <Text style={styles.fontScale}>Device height: {height}</Text>
                    <Text style={styles.fontScale}>Device inch: {deviceInch}</Text>
                    <Text style={styles.fontScale}>isAndroid: {isAndroid.toString()}</Text>
                    <Text style={styles.fontScale}>isIOS: {isIOS.toString()}</Text>
                    <Text style={styles.fontScale}>hasNotch: {hasNotch.toString()}</Text>
                    <Text style={styles.fontScale}>isTablet: {isTablet.toString()}</Text>
                    <Text style={styles.fontScale}>isSmallDevice: {isSmallDevice.toString()}</Text>
                    <View style={styles.box}>
                        <Text style={[styles.color, {fontSize: fontScale(14)}]}>150x150</Text>
                        <Text style={[styles.color, {fontSize: fontScale(14)}]}>
                            Scale: {scale(150)}x{scale(150)}
                        </Text>
                    </View>
                </SafeAreaView>
            </ScrollView>
        );
    };

    const styles = StyleSheet.create({
        container: {
            flex: 1,
            alignItems: 'center',
            justifyContent: 'center',
        },
        fontScale: {
            fontSize: fontScale(16),
        },
        box: {
            width: scale(150),
            height: scale(150),
            backgroundColor: 'black',
            alignItems: 'center',
            justifyContent: 'center',
            margin: scale(16),
        },
        color: {
            color: 'white',
        },
    });

    export default App;