Book Image

JavaScript and JSON Essentials - Second Edition

By : Bruno Joseph D'mello, Sai S Sriparasa
Book Image

JavaScript and JSON Essentials - Second Edition

By: Bruno Joseph D'mello, Sai S Sriparasa

Overview of this book

JSON is an established and standard format used to exchange data. This book shows how JSON plays different roles in full web development through examples. By the end of this book, you'll have a new perspective on providing solutions for your applications and handling their complexities. After establishing a strong basic foundation with JSON, you'll learn to build frontend apps by creating a carousel. Next, you'll learn to implement JSON with Angular 5, Node.js, template embedding, and composer.json in PHP. This book will also help you implement Hapi.js (known for its JSON-configurable architecture) for server-side scripting. You'll learn to implement JSON for real-time apps using Kafka, as well as how to implement JSON for a task runner, and for MongoDB BSON storage. The book ends with some case studies on JSON formats to help you sharpen your creativity by exploring futuristic JSON implementations. By the end of the book, you'll be up and running with all the essential features of JSON and JavaScript and able to build fast, scalable, and efficient web applications.
Table of Contents (20 chapters)
Title Page
Copyright and Credits
Dedication
Packt Upsell
Contributors
Preface
Index

JSON for storing application metadata


On the same line as dependency managers, JSON is also used to store metadata for software projects. How is metadata different from application configuration explained in the preceding section? This can be differentiated from the fact that the configuration is a set of customized settings that is required for the applications working. So configuration data can be said as a type of metadata or subset of the metadata. To understand it completely, let us dive in through various implementations of JSON as metadata. 

Metadata in Angular 5

In Angular, metadata is used while processing a class for some specific functionality. The metadata configures the class so that it can be used as a component or services. The metadata is implemented via class decorators or property metadata. We will be learning about the class decorators as it suits our JSON essential context. 

In the Angular (above version 2) application, the first thing to learn about is NgModule.

An NgModule...