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

The component life cycle


Component instances have a life cycle that we can hook into. Currently, our mini application contains four components: App, accordion, accordion-tab, and user-info, but a typical Angular application will contain tens of component trees that Angular will create, update, and destroy during our application's lifetime.

For demo purposes, we will simulate a server call that returns other data. For this, create a file called other-users.json inside the server directory and paste this code into it:

[other-users.json]
[
  {
    "id": 5,
    "name": "Michael jackson",
    "email": "[email protected]",
    "birthday": "22/3/1974",
    "gender": "male",
    "status": "onhold",
    "role": "manager",
    "phoneNumbers": [
      "+972-123-9873"
    ]
  },
  (...)
]

On the accordion component template, we will add a button that will fetch this new data and implement the fetchData method on the Component class:

[accordion.ts]
import { Component, Inject } from '@angular/core';
import...