Book Image

Angular 2 Components

By : Thierry Templier Thierry
Book Image

Angular 2 Components

By: 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
About the Authors
About the Reviewers

Passing data via properties

The parent component can pass data to the child component through properties. There are two ways that define input properties for a component:

  • By creating an input array on the component decorator

  • By using the @Input decorator for decorating a class property

Using the component input array is simple and straightforward. Just declare an input array and populate it with strings that represent the name of the property you are expecting:

import { Component } from '@angular/core';

  selector: 'child-component',
  inputs:   ['title'],
  template: `<h2>{{ title }}</h2>`

export class ChildComponent {}

  selector: 'app-root',
  template: ` 
    <h1>Component Interactions</h1>
    <child-component [title]="title" ></child-component>
export class AppComponent {
  private title: string = "Sub title for child";

In this example, we created a child component, which defined an input array...