Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "We have to create an src folder where we will store all our React code."

Also in big code blocks, when some pieces of code are not relevant or reviewed in a different place, they will be replaced by an ellipsis (...).

A block of code is set as follows:

/*** index.js ***/

import { AppRegistry } from 'react-native';
import App from './src/main';
AppRegistry.registerComponent('GroceriesList', () => App);

Any command-line input or output is written as follows:

react-native run-ios

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "The back button on the Add a product screen."