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React and React Native

You're reading from   React and React Native Build cross-platform JavaScript apps with native power for mobile, web and desktop

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Product type Paperback
Published in Mar 2017
Publisher Packt
ISBN-13 9781786465658
Length 500 pages
Edition 1st Edition
Languages
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Author (1):
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Adam Boduch Adam Boduch
Author Profile Icon Adam Boduch
Adam Boduch
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Table of Contents (27) Chapters Close

Preface 1. Why React? 2. Rendering with JSX FREE CHAPTER 3. Understanding Properties and State 4. Event Handling – The React Way 5. Crafting Reusable Components 6. The React Component Lifecycle 7. Validating Component Properties 8. Extending Components 9. Handling Navigation with Routes 10. Server-Side React Components 11. Mobile-First React Components 12. Why React Native? 13. Kickstarting React Native Projects 14. Building Responsive Layouts with Flexbox 15. Navigating Between Screens 16. Rendering Item Lists 17. Showing Progress 18. Geolocation and Maps 19. Collecting User Input 20. Alerts, Notifications, and Confirmation 21. Responding to User Gestures 22. Controlling Image Display 23. Going Offline 24. Handling Application State 25. Why Relay and GraphQL? 26. Building a Relay React App

Indicating progress

In this section, you'll learn how to use the <ActivityIndicator> component. As the name suggests, you render this component when you need to indicate to the user that something is happening. The actual progress may be indeterminate, but at least you have a standardized means to show that something is happening, despite there being no results to display yet.

We'll create a super simple example just, so you can see what this component looks like. Here's the main module for the app:

import React from 'react'; 
import { 
  AppRegistry, 
  View, 
  ActivityIndicator, 
} from 'react-native'; 
 
import styles from './styles'; 
 
// Renders an "<ActivityIndicator>" component in the 
// middle of the screen. It will animate on it's own 
// while displayed. 
const IndicatingProgress = () => ( 
  <View style={styles.container}> 
    <ActivityIndicator size="large" /> 
  </View>...
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