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Rapid Application Development with AWS Amplify

You're reading from   Rapid Application Development with AWS Amplify Full stack web development on Amazon Web Servics

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Product type Paperback
Published in Jul 2021
Publisher Packt
ISBN-13 9781800207233
Length 344 pages
Edition 1st Edition
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Author (1):
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Adrian Leung Adrian Leung
Author Profile Icon Adrian Leung
Adrian Leung
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Table of Contents (14) Chapters Close

Preface 1. Section 1: Getting Ready
2. Chapter 1: Getting Familiar with the Amplify CLI and Amplify Console FREE CHAPTER 3. Chapter 2: Creating a React App with AmplifyJS and TypeScript 4. Section 2: Building a Photo Sharing App
5. Chapter 3: Pluggable Amplify UI Components 6. Chapter 4: User Management with Amplify Authentication 7. Chapter 5: Creating a Blog Post with Amplify GraphQL 8. Chapter 6: Uploading and Sharing Photos with Amplify Storage 9. Section 3: Production Readiness
10. Chapter 7: Setting Up an Amplify Pipeline 11. Chapter 8: Test Automation with Cypress 12. Chapter 9: Setting Up a Custom Domain Name and the Amplify Admin UI 13. Other Books You May Enjoy

Getting real-time updates with Subscriptions with ReactJS

In this section, we will show you how to use Subscriptions in GraphQL. Subscriptions are used to query the database and listen to changes in the data to provide instant updates when that happens. They do this by maintaining an active connection with the database. Subscriptions are useful for tasks such as producing real-time notifications when something has changed in the database.

Let's open the App.jsx file and add the following code:

  1. Import the autogenerated subscriptions library at the top of the App.jsx file, as follows:
    import React, { useEffect, useState, SetStateAction } from "react";
    import "./App.css";
    import Amplify, { API, graphqlOperation } from "aws-amplify";
    import * as mutations from "./graphql/mutations";
    import * as queries from "./graphql/queries";
    import * as subscriptions from "./graphql/subscriptions";
    import awsExports from &quot...
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