Book Image

Angular 2 Components

By : Robin Böhm, Nir Kaufman, Thierry Templier Thierry
Book Image

Angular 2 Components

By: Robin Böhm, Nir Kaufman, Thierry Templier Thierry

Overview of this book

This book is a concise guide to Angular 2 Components and is based on the stable version of Angular 2. You will start with learning about the Angular 2 Components architecture and how components differ from Angular directives in Angular 1. You will then move on to quickly set up an Angular 2 development environment and grasp the basics of TypeScript. With this strong foundation in place, you will start building components. The book will teach you, with an example, how to define component behavior, create component templates, and use the controller of your component. You will also learn how to make your components communicate with each other. Once you have built a component, you will learn how to extend it by integrating third-party components with it. By the end of the book, you will be confident with building and using components for your applications.
Table of Contents (16 chapters)
Angular 2 Components
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Classes


The JavaScript language's object-oriented capabilities are built around the concept of prototypes. The prototype model defines links between objects, instead of inheritance trees. The prototype model, as powerful as it is, is not very friendly to the average JavaScript programmer. TypeScript enables us to create classes with a familiar syntax, and it's completely identical to JavaScript 1.5 classes (if we choose not to use TypeScript exclusive features). To define a class in TypeScript, we use the class keyword:

class Product {}

Classes in TypeScript might have a constructor and methods just like JavaScript 2015. TypeScript also adds the ability to define class properties. The following example shows our Product class with a constructor, property, and a method:

class Product {
 
  color;
  price;

  constructor(color, price) {
    this.color = color;
    this.price = price;
  }

  getProductDetails() {
    return this.color + this.price;
  }
}

In TypeScript, just like JavaScript 2015...