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With React Native, you style your application using JavaScript. All of the core components accept a prop named style. The style names and values usually match how CSS works on the web, except names are written using camel casing, e.g. backgroundColor rather than background-color.
The style prop can be a plain old JavaScript object. That's what we usually use for example code. You can also pass an array of styles - the last style in the array has precedence, so you can use this to inherit styles.
As a component grows in complexity, it is often cleaner to use StyleSheet.create to define several styles in one place. Here's an example:
import React, { Component } from 'react';
import { StyleSheet, Text, View } from 'react-native';

const styles = StyleSheet.create({
  bigBlue: {
    color: 'blue',
    fontWeight: 'bold',
    fontSize: 30,
  red: {
    color: 'red',

export default class LotsOfStyles extends Component {
  render() {
    return (
        <Text style={styles.red}>just red</Text>
        <Text style={styles.bigBlue}>just bigBlue</Text>
        <Text style={[styles.bigBlue, styles.red]}>bigBlue, then red</Text>
        <Text style={[styles.red, styles.bigBlue]}>red, then bigBlue</Text>
One common pattern is to make your component accept a style prop which in turn is used to style subcomponents. You can use this to make styles "cascade" the way they do in CSS.
There are a lot more ways to customize text style. Check out the Text component reference for a complete list.
Now you can make your text beautiful. The next step in becoming a style master is to learn how to control component size.
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