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JavaScript and JSON Essentials

Sai Srinivas Sriparasa

If you fancy a less verbose data format than CSV or XML, then JSON could be for you. This tutorial will teach you about using JSON with JavaScript for effective local storage or Internet transfers.
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Book Details

ISBN 139781783286034
Paperback120 pages

About This Book

  • Deploy JSON across various domains
  • Facilitate metadata storage with JSON
  • Build a practical data-driven web application with JSON

Who This Book Is For

This book is a great resource for developers who would like to learn more about JSON and who wish to apply it in their own projects. It will be useful to have some prior knowledge of HTML and JavaScript to help you understand the concepts covered in this book. Some familiarity with a server-side language such as PHP, C#, or Python would also be beneficial, but this is not compulsory.

Table of Contents

Chapter 1: JavaScript Basics
Variables in JavaScript
The Carousel application
Chapter 2: Getting Started with JSON
The Hello World program with JSON
Datatypes in JSON
Languages that support JSON
Chapter 3: Working with Real-time JSON
Accessing objects in JSON
Performing complex operations
Modifying JSON
Chapter 4: AJAX Calls with JSON Data
Requirements for AJAX
Hosting JSON
Making your first AJAX call
Parsing JSON data
Chapter 5: Cross-domain Asynchronous Requests
Making GET and POST AJAX calls with JSON data
The problem with cross-domain AJAX calls
Introduction to JSONP
Implementing JSONP
Chapter 6: Building the Carousel Application
Setting up the application
Building the JSON file for the Carousel application
Creating the Carousel application with jQuery Cycle
Chapter 7: Alternate Implementations of JSON
Dependency management
JSON for storing metadata
Comparisons with YAML
Chapter 8: Debugging JSON
Using the developer tools
Validating JSON
Formatting JSON

What You Will Learn

  • Learn how to work with real-time JSON
  • Transfer JSON data via asynchronous calls
  • Fire cross-domain asynchronous requests
  • Serialize and transmit data
  • Build the Carousel application
  • Understand alternate implementations of JSON
  • Debug JSON quickly and efficiently

In Detail

The exchange of data over the Internet has been carried out since its inception. Delimiter-separated lists such as CSV and tag-separated languages such as XML are very popular, yet they are considered to be verbose by a section of developers. JSON (JavaScript Object Notation) is a lightweight text-based code to create objects to transfer data over the Internet. It is a data exchange format that is human-readable (like XML, but without the markup around your actual payload) and its syntax is a subset of the JavaScript language that was standardized in 1999.

JavaScript and JSON Essentials is a step-by-step guide that will introduce you to JSON and help you understand how the lightweight JSON data format can be used in different ways either to store data locally or to transfer data over the Internet. This book will teach you how to use JSON effectively with JavaScript.

This book begins with a brief refresher course on JavaScript before taking you through how JSON data can be transferred via synchronous, asynchronous, and cross-domain asynchronous HTTP calls. JSON is not just about data transfer; this book throws light on the alternate implementations of JSON as well.

You will learn the data types that JavaScript uses and how those data types can be used in JSON. You will go through the concepts of how to create, update, parse, and delete a JSON object. You will also look at the different techniques of loading a JSON file onto a web page, how to use jQuery to traverse through an object, and how to perform access operations. You will also go over a few resources that will make debugging JSON quick and easy.


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