React Native global styles

You may create a reusable stylesheet. Example:

style.js

'use strict';
import { StyleSheet } from 'react-native';

module.exports = StyleSheet.create({
    alwaysred: {
        backgroundColor: 'red',
        height: 100,
        width: 100,
    },
});

In your component:

const s = require('./style');

…then:

<View style={s.alwaysred} ></View>