Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Save more on your purchases now! discount-offer-chevron-icon
Savings automatically calculated. No voucher code required. Paperback excluded.
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
Getting Started with Angular - Second edition
Getting Started with Angular - Second edition

Getting Started with Angular - Second edition: Fast-track your web development skills to build high performance SPA with Angular 2 and beyond , Second Edition

Arrow left icon
Profile Icon Minko Gechev
Arrow right icon
€29.99
Paperback Feb 2017 278 pages 2nd Edition
eBook
€15.99 €23.99
Paperback
€29.99
Subscription
Free Trial
Renews at €18.99p/m
Arrow left icon
Profile Icon Minko Gechev
Arrow right icon
€29.99
Paperback Feb 2017 278 pages 2nd Edition
eBook
€15.99 €23.99
Paperback
€29.99
Subscription
Free Trial
Renews at €18.99p/m
eBook
€15.99 €23.99
Paperback
€29.99
Subscription
Free Trial
Renews at €18.99p/m

What do you get with Print?

Product feature icon Instant access to your digital eBook copy whilst your Print order is Shipped
Product feature icon Paperback book shipped to your preferred address
Product feature icon Download this book in EPUB and PDF formats
Product feature icon Access this title in our online reader with advanced features
Product feature icon DRM FREE - Read whenever, wherever and however you want
Table of content icon View table of contents Preview book icon Preview Book

Getting Started with Angular - Second edition

Chapter 2. The Building Blocks of an Angular Application

In the previous chapter, we looked at the drivers for the design decisions behind the new Angular. We described the main reasons that led to the development of a brand new framework; Angular takes advantage of the newest Web standards while keeping the past lessons in mind. Although we are familiar with the main drivers, we still haven't described the core Angular concepts. The last major release of the framework took a different path from AngularJS and introduced a lot of changes in the fundamental building blocks used for the development of single-page applications.

The mission of this chapter is to describe the framework's core and make a brief introduction to its main concepts. In the next couple of pages, we will also make an overview of how these concepts can be put together to help us build professional user interfaces for our Web applications. The subsequent sections will give us an overview...

A conceptual overview of Angular

Before we dive into the different parts of Angular, let's get a conceptual overview of how everything fits together. Let's take a look at the following diagram:

A conceptual overview of Angular

Figure 1

Figure 1 to Figure 4 show the main Angular concepts and the connections between them. The main purpose of these diagrams is to illustrate the core blocks for building single-page applications with Angular, and their relations.

The Component is the main building block we will use to create the user interface of our applications with Angular. The Component is a direct successor of the Directive, which is the primitive for attaching behavior to the DOM. Components extend Directives by providing further features, such as a template, which can be used to render composition of directives. Inside the template of the view can reside different expressions.

A conceptual overview of Angular

Figure 2

The preceding diagram conceptually illustrates the Change Detection mechanism of Angular. It performs dirty checking...

Changing directives

AngularJS introduced the concept of directives in the development of single-page applications. The purpose of directives is to encapsulate the DOM-related logic and allow us to build user interfaces by composing them. This way, we are able to extend the syntax and the semantics of HTML. Initially, like most innovative concepts, directives were viewed controversially because they predispose us to write invalid HTML when using custom elements or attributes without the data- prefix. However, over time, this concept has gradually been accepted and has proved that it is here to stay.

Another drawback of the implementation of directives in AngularJS is the different ways we can use them. This requires an understanding of the attribute values, which can be literals, expressions, callbacks, or microsyntax. This makes tooling essentially impossible.

The latest versions of Angular keep the concept of directives, but take the best parts from AngularJS and add some...

Getting to know Angular components

Model View Controller (MVC) is a micro-architectural pattern initially introduced for the implementation of user interfaces. As Angular developers, we use different variations of this pattern on a daily basis, most often Model View ViewModel (MVVM). In MVC, we have the model, which encapsulates the business logic of our application, and the view, which is responsible for rendering the user interface, accepting user input, and delegating the user interaction logic to the controller. The view is represented as composition of components, which is formally known as the composite design pattern.

Let's take a look at the following structural diagram, which shows the composite design pattern:

Getting to know Angular components

Figure 5

Here, we have three classes:

  • An abstract class called Component.
  • Two concrete classes called Leaf and Composite. The Leaf class is a simple terminal component in the component tree that we will build soon.

The Component class defines an abstract operation called...

Angular modules

In AngularJS, we have the concept of modules. Modules there are responsible for grouping pieces of related functionality together and registering it internally during the bootstrap process. Unfortunately, they didn't provide features such as encapsulation and lazy loading.

Angular introduced the NgModules as part of the fifth release candidate of the framework. The main purpose of the new modules is to give a context for the Angular compiler and achieve a good level of encapsulation. For instance, if we are building a library with NgModules, we can have a number of declarations, which are used internally but not exported as part of the public interface. Let's take a look at the following example:

import {NgModule} from '@angular/core';
import {CommonModule} from '@angular/common';
import {TabComponent} from './tab.component';
import {TabItemComponent} from './tab-item.component'...

A conceptual overview of Angular


Before we dive into the different parts of Angular, let's get a conceptual overview of how everything fits together. Let's take a look at the following diagram:

Figure 1

Figure 1 to Figure 4 show the main Angular concepts and the connections between them. The main purpose of these diagrams is to illustrate the core blocks for building single-page applications with Angular, and their relations.

The Component is the main building block we will use to create the user interface of our applications with Angular. The Component is a direct successor of the Directive, which is the primitive for attaching behavior to the DOM. Components extend Directives by providing further features, such as a template, which can be used to render composition of directives. Inside the template of the view can reside different expressions.

Figure 2

The preceding diagram conceptually illustrates the Change Detection mechanism of Angular. It performs dirty checking, which evaluates...

Changing directives


AngularJS introduced the concept of directives in the development of single-page applications. The purpose of directives is to encapsulate the DOM-related logic and allow us to build user interfaces by composing them. This way, we are able to extend the syntax and the semantics of HTML. Initially, like most innovative concepts, directives were viewed controversially because they predispose us to write invalid HTML when using custom elements or attributes without the data- prefix. However, over time, this concept has gradually been accepted and has proved that it is here to stay.

Another drawback of the implementation of directives in AngularJS is the different ways we can use them. This requires an understanding of the attribute values, which can be literals, expressions, callbacks, or microsyntax. This makes tooling essentially impossible.

The latest versions of Angular keep the concept of directives, but take the best parts from AngularJS and add some new ideas and syntax...

Getting to know Angular components


Model View Controller (MVC) is a micro-architectural pattern initially introduced for the implementation of user interfaces. As Angular developers, we use different variations of this pattern on a daily basis, most often Model View ViewModel (MVVM). In MVC, we have the model, which encapsulates the business logic of our application, and the view, which is responsible for rendering the user interface, accepting user input, and delegating the user interaction logic to the controller. The view is represented as composition of components, which is formally known as the composite design pattern.

Let's take a look at the following structural diagram, which shows the composite design pattern:

Figure 5

Here, we have three classes:

  • An abstract class called Component.

  • Two concrete classes called Leaf and Composite. The Leaf class is a simple terminal component in the component tree that we will build soon.

The Component class defines an abstract operation called operation...

Angular modules


In AngularJS, we have the concept of modules. Modules there are responsible for grouping pieces of related functionality together and registering it internally during the bootstrap process. Unfortunately, they didn't provide features such as encapsulation and lazy loading.

Angular introduced the NgModules as part of the fifth release candidate of the framework. The main purpose of the new modules is to give a context for the Angular compiler and achieve a good level of encapsulation. For instance, if we are building a library with NgModules, we can have a number of declarations, which are used internally but not exported as part of the public interface. Let's take a look at the following example:

import {NgModule} from '@angular/core';
import {CommonModule} from '@angular/common';
import {TabComponent} from './tab.component';
import {TabItemComponent} from './tab-item.component';

@NgModule({
  imports: [CommonModule],
  declarations: [TabComponent...

Pipes


In business applications, we often need to have different visual representations of the same piece of data. For example, if we have the number 100,000 and we want to format it as currency, most likely we won't want to display it as plain data; more likely, we'll want something like $100,000.

The responsibility for formatting data in AngularJS was assigned to filters. Another example for a data formatting requirement is when we use collections of items. For instance, if we have a list of items, we may want to filter it based on a predicate (a boolean function); in a list of numbers, we may want to display only the prime numbers. AngularJS has a filter called filter, which allows us to do this. However, the duplication of the names often leads to confusion. That's another reason the core team renamed the filter component to a pipe.

The motivation behind the new name is the syntax used for pipes and filters:

{{expression | decimal | currency}} 

In the preceding example, we apply the...

Left arrow icon Right arrow icon
Download code icon Download Code

Key benefits

  • ? Guide through the changes made from AngularJS with side-by-side code samples to help demystify the Angular learning curve ? Tips to start working with Angular?s new method of implementing directives ? Using TypeScript to write modern, powerful Angular applications ? Understanding the change detection method and other architectural changes ? Working with the new router in Angular ? Using new features of Angular, including pipes ? Understanding updated features of Angular, including forms, services and dependency injection ? Keeping new applications SEO-friendly with server-side rendering ? Enhancing applications using Ahead-of-Time compilation and Web Workers

Description

Want to build quick and robust web applications with Angular? This book is the quickest way to get to grips with Angular and take advantage of all its new features.

Who is this book for?

Who is this book for? ? Developers who are familiar with AngularJS and JavaScript ? Anyone looking to learn all about Angular ? IT professionals interested in assessing changes to Angular before moving over

What you will learn

  • You?ll learn how to take full advantage of Angular, with updates on the latest API changes introduced by Angular 2 and 4 and a crash-course on TypeScript. Whether building a new app with Angular ASP.NET or upgrading from Angular JS with ngUpgrade, this book will give you all the tools to complete your project.
Estimated delivery fee Deliver to Italy

Premium delivery 7 - 10 business days

€17.95
(Includes tracking information)

Product Details

Country selected
Publication date, Length, Edition, Language, ISBN-13
Publication date : Feb 24, 2017
Length: 278 pages
Edition : 2nd
Language : English
ISBN-13 : 9781787125278
Vendor :
Google
Languages :
Tools :

What do you get with Print?

Product feature icon Instant access to your digital eBook copy whilst your Print order is Shipped
Product feature icon Paperback book shipped to your preferred address
Product feature icon Download this book in EPUB and PDF formats
Product feature icon Access this title in our online reader with advanced features
Product feature icon DRM FREE - Read whenever, wherever and however you want
Estimated delivery fee Deliver to Italy

Premium delivery 7 - 10 business days

€17.95
(Includes tracking information)

Product Details

Publication date : Feb 24, 2017
Length: 278 pages
Edition : 2nd
Language : English
ISBN-13 : 9781787125278
Vendor :
Google
Languages :
Tools :

Packt Subscriptions

See our plans and pricing
Modal Close icon
€18.99 billed monthly
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Simple pricing, no contract
€189.99 billed annually
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Choose a DRM-free eBook or Video every month to keep
Feature tick icon PLUS own as many other DRM-free eBooks or Videos as you like for just €5 each
Feature tick icon Exclusive print discounts
€264.99 billed in 18 months
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Choose a DRM-free eBook or Video every month to keep
Feature tick icon PLUS own as many other DRM-free eBooks or Videos as you like for just €5 each
Feature tick icon Exclusive print discounts

Frequently bought together


Stars icon
Total 104.97
Angular 2 Cookbook
€41.99
Getting Started with Angular - Second edition
€29.99
Angular Services
€32.99
Total 104.97 Stars icon

Table of Contents

8 Chapters
1. Get Going with Angular Chevron down icon Chevron up icon
2. The Building Blocks of an Angular Application Chevron down icon Chevron up icon
3. TypeScript Crash Course Chevron down icon Chevron up icon
4. Getting Started with Angular Components and Directives Chevron down icon Chevron up icon
5. Dependency Injection in Angular Chevron down icon Chevron up icon
6. Working with the Angular Router and Forms Chevron down icon Chevron up icon
7. Explaining Pipes and Communicating with RESTful Services Chevron down icon Chevron up icon
8. Tooling and Development Experience Chevron down icon Chevron up icon
Get free access to Packt library with over 7500+ books and video courses for 7 days!
Start Free Trial

FAQs

What is the delivery time and cost of print book? Chevron down icon Chevron up icon

Shipping Details

USA:

'

Economy: Delivery to most addresses in the US within 10-15 business days

Premium: Trackable Delivery to most addresses in the US within 3-8 business days

UK:

Economy: Delivery to most addresses in the U.K. within 7-9 business days.
Shipments are not trackable

Premium: Trackable delivery to most addresses in the U.K. within 3-4 business days!
Add one extra business day for deliveries to Northern Ireland and Scottish Highlands and islands

EU:

Premium: Trackable delivery to most EU destinations within 4-9 business days.

Australia:

Economy: Can deliver to P. O. Boxes and private residences.
Trackable service with delivery to addresses in Australia only.
Delivery time ranges from 7-9 business days for VIC and 8-10 business days for Interstate metro
Delivery time is up to 15 business days for remote areas of WA, NT & QLD.

Premium: Delivery to addresses in Australia only
Trackable delivery to most P. O. Boxes and private residences in Australia within 4-5 days based on the distance to a destination following dispatch.

India:

Premium: Delivery to most Indian addresses within 5-6 business days

Rest of the World:

Premium: Countries in the American continent: Trackable delivery to most countries within 4-7 business days

Asia:

Premium: Delivery to most Asian addresses within 5-9 business days

Disclaimer:
All orders received before 5 PM U.K time would start printing from the next business day. So the estimated delivery times start from the next day as well. Orders received after 5 PM U.K time (in our internal systems) on a business day or anytime on the weekend will begin printing the second to next business day. For example, an order placed at 11 AM today will begin printing tomorrow, whereas an order placed at 9 PM tonight will begin printing the day after tomorrow.


Unfortunately, due to several restrictions, we are unable to ship to the following countries:

  1. Afghanistan
  2. American Samoa
  3. Belarus
  4. Brunei Darussalam
  5. Central African Republic
  6. The Democratic Republic of Congo
  7. Eritrea
  8. Guinea-bissau
  9. Iran
  10. Lebanon
  11. Libiya Arab Jamahriya
  12. Somalia
  13. Sudan
  14. Russian Federation
  15. Syrian Arab Republic
  16. Ukraine
  17. Venezuela
What is custom duty/charge? Chevron down icon Chevron up icon

Customs duty are charges levied on goods when they cross international borders. It is a tax that is imposed on imported goods. These duties are charged by special authorities and bodies created by local governments and are meant to protect local industries, economies, and businesses.

Do I have to pay customs charges for the print book order? Chevron down icon Chevron up icon

The orders shipped to the countries that are listed under EU27 will not bear custom charges. They are paid by Packt as part of the order.

List of EU27 countries: www.gov.uk/eu-eea:

A custom duty or localized taxes may be applicable on the shipment and would be charged by the recipient country outside of the EU27 which should be paid by the customer and these duties are not included in the shipping charges been charged on the order.

How do I know my custom duty charges? Chevron down icon Chevron up icon

The amount of duty payable varies greatly depending on the imported goods, the country of origin and several other factors like the total invoice amount or dimensions like weight, and other such criteria applicable in your country.

For example:

  • If you live in Mexico, and the declared value of your ordered items is over $ 50, for you to receive a package, you will have to pay additional import tax of 19% which will be $ 9.50 to the courier service.
  • Whereas if you live in Turkey, and the declared value of your ordered items is over € 22, for you to receive a package, you will have to pay additional import tax of 18% which will be € 3.96 to the courier service.
How can I cancel my order? Chevron down icon Chevron up icon

Cancellation Policy for Published Printed Books:

You can cancel any order within 1 hour of placing the order. Simply contact customercare@packt.com with your order details or payment transaction id. If your order has already started the shipment process, we will do our best to stop it. However, if it is already on the way to you then when you receive it, you can contact us at customercare@packt.com using the returns and refund process.

Please understand that Packt Publishing cannot provide refunds or cancel any order except for the cases described in our Return Policy (i.e. Packt Publishing agrees to replace your printed book because it arrives damaged or material defect in book), Packt Publishing will not accept returns.

What is your returns and refunds policy? Chevron down icon Chevron up icon

Return Policy:

We want you to be happy with your purchase from Packtpub.com. We will not hassle you with returning print books to us. If the print book you receive from us is incorrect, damaged, doesn't work or is unacceptably late, please contact Customer Relations Team on customercare@packt.com with the order number and issue details as explained below:

  1. If you ordered (eBook, Video or Print Book) incorrectly or accidentally, please contact Customer Relations Team on customercare@packt.com within one hour of placing the order and we will replace/refund you the item cost.
  2. Sadly, if your eBook or Video file is faulty or a fault occurs during the eBook or Video being made available to you, i.e. during download then you should contact Customer Relations Team within 14 days of purchase on customercare@packt.com who will be able to resolve this issue for you.
  3. You will have a choice of replacement or refund of the problem items.(damaged, defective or incorrect)
  4. Once Customer Care Team confirms that you will be refunded, you should receive the refund within 10 to 12 working days.
  5. If you are only requesting a refund of one book from a multiple order, then we will refund you the appropriate single item.
  6. Where the items were shipped under a free shipping offer, there will be no shipping costs to refund.

On the off chance your printed book arrives damaged, with book material defect, contact our Customer Relation Team on customercare@packt.com within 14 days of receipt of the book with appropriate evidence of damage and we will work with you to secure a replacement copy, if necessary. Please note that each printed book you order from us is individually made by Packt's professional book-printing partner which is on a print-on-demand basis.

What tax is charged? Chevron down icon Chevron up icon

Currently, no tax is charged on the purchase of any print book (subject to change based on the laws and regulations). A localized VAT fee is charged only to our European and UK customers on eBooks, Video and subscriptions that they buy. GST is charged to Indian customers for eBooks and video purchases.

What payment methods can I use? Chevron down icon Chevron up icon

You can pay with the following card types:

  1. Visa Debit
  2. Visa Credit
  3. MasterCard
  4. PayPal
What is the delivery time and cost of print books? Chevron down icon Chevron up icon

Shipping Details

USA:

'

Economy: Delivery to most addresses in the US within 10-15 business days

Premium: Trackable Delivery to most addresses in the US within 3-8 business days

UK:

Economy: Delivery to most addresses in the U.K. within 7-9 business days.
Shipments are not trackable

Premium: Trackable delivery to most addresses in the U.K. within 3-4 business days!
Add one extra business day for deliveries to Northern Ireland and Scottish Highlands and islands

EU:

Premium: Trackable delivery to most EU destinations within 4-9 business days.

Australia:

Economy: Can deliver to P. O. Boxes and private residences.
Trackable service with delivery to addresses in Australia only.
Delivery time ranges from 7-9 business days for VIC and 8-10 business days for Interstate metro
Delivery time is up to 15 business days for remote areas of WA, NT & QLD.

Premium: Delivery to addresses in Australia only
Trackable delivery to most P. O. Boxes and private residences in Australia within 4-5 days based on the distance to a destination following dispatch.

India:

Premium: Delivery to most Indian addresses within 5-6 business days

Rest of the World:

Premium: Countries in the American continent: Trackable delivery to most countries within 4-7 business days

Asia:

Premium: Delivery to most Asian addresses within 5-9 business days

Disclaimer:
All orders received before 5 PM U.K time would start printing from the next business day. So the estimated delivery times start from the next day as well. Orders received after 5 PM U.K time (in our internal systems) on a business day or anytime on the weekend will begin printing the second to next business day. For example, an order placed at 11 AM today will begin printing tomorrow, whereas an order placed at 9 PM tonight will begin printing the day after tomorrow.


Unfortunately, due to several restrictions, we are unable to ship to the following countries:

  1. Afghanistan
  2. American Samoa
  3. Belarus
  4. Brunei Darussalam
  5. Central African Republic
  6. The Democratic Republic of Congo
  7. Eritrea
  8. Guinea-bissau
  9. Iran
  10. Lebanon
  11. Libiya Arab Jamahriya
  12. Somalia
  13. Sudan
  14. Russian Federation
  15. Syrian Arab Republic
  16. Ukraine
  17. Venezuela