Introducing React Native styles

It's time to implement your first React Native app, beyond the boilerplate that's generated by create-react-native-app. I want to make sure that you feel comfortable using React Native style sheets before you start implementing Flexbox layouts in the next section.

Here's what a React Native style sheet looks like:

import { Platform, StyleSheet, StatusBar } from "react-native";
export default StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: "center",
    alignItems: "center",
    backgroundColor: "ghostwhite",
    ...Platform.select({
      ios: { paddingTop: 20 },
      android: { paddingTop: StatusBar.currentHeight },
    }),
  },
  box: {
    width...