Book Image

React and React Native - Third Edition

By : Adam Boduch, Roy Derks
Book Image

React and React Native - Third Edition

By: Adam Boduch, Roy Derks

Overview of this book

React and React Native, Facebook’s innovative User Interface (UI) libraries, are designed to help you build robust cross-platform web and mobile applications. This updated third edition is improved and updated to cover the latest version of React. The book particularly focuses on the latest developments in the React ecosystem, such as modern Hook implementations, code splitting using lazy components and Suspense, user interface framework components using Material-UI, and Apollo. In terms of React Native, the book has been updated to version 0.62 and demonstrates how to apply native UI components for your existing mobile apps using NativeBase. You will begin by learning about the essential building blocks of React components. Next, you’ll progress to working with higher-level functionalities in application development, before putting this knowledge to use by developing user interface components for the web and for native platforms. In the concluding chapters, you’ll learn how to bring your application together with a robust data architecture. By the end of this book, you’ll be able to build React applications for the web and React Native applications for multiple mobile platforms.
Table of Contents (33 chapters)
Section 1: React
Section 2: React Native
Section 3: React Architecture

Selecting from a list of options

In web applications, you typically use the <select> element to let the user choose from a list of options. React Native comes with a <Picker> component, which works on both iOS and Android. There is some trickery involved with styling this component based on which platform the user is on, so let's hide all of this inside of a generic Select component. Here's the Select.ios.js module:

import React from "react";
import PropTypes from "prop-types";
import { View, Picker, Text } from "react-native";
import styles from "./styles";

export default function Select(props) {
return (
<View style={styles.pickerHeight}>
<View style={styles.pickerContainer}>
<Text style={styles.pickerLabel}>{props.label}</Text>
<Picker style={styles.picker} {...props}>
{ => (
<Picker.Item key={i.label} {...i} />