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Getting Started with Angular - Second edition

Getting Started with Angular - Second edition - Second Edition

By : Minko Gechev
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Getting Started with Angular - Second edition

Getting Started with Angular - Second edition

By: Minko Gechev
Buy this Book

Overview of this book

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.
Table of Contents (9 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Get Going with Angular
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1. Get Going with Angular
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Angular and semver
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The evolution of the Web - time for a new framework
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The evolution of ECMAScript
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Lessons learned from AngularJS in the wild
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Summary
2
2. The Building Blocks of an Angular Application
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2. The Building Blocks of an Angular Application
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A conceptual overview of Angular
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Changing directives
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Getting to know Angular components
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Angular modules
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Pipes
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Improving change detection
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Services
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The new router
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Summary
3
3. TypeScript Crash Course
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3. TypeScript Crash Course
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Introduction to TypeScript
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Using TypeScript
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TypeScript syntax and features introduced by ES2015 and ES2016
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Meta-programming with ES2016 decorators
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Writing modular code with ES2015
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ES2015 module loader
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ES2015 and ES2016 recap
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Taking advantage of static typing
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Further expressiveness with TypeScript decorators
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Writing generic code by using type parameters
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Writing less verbose code with TypeScript's type inference
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Using ambient type definitions
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Summary
4
4. Getting Started with Angular Components and Directives
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4. Getting Started with Angular Components and Directives
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The "Hello world!" application in Angular
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Using TypeScript
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Playing with Angular and TypeScript
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Using Angular directives
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Improved semantics of the directives syntax
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Defining Angular directives
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Creating custom Angular components
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Explaining Angular's content projection
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Hooking into the component's life cycle
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Defining generic views with TemplateRef
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Understanding and enhancing the change detection
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Summary
5
5. Dependency Injection in Angular
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5. Dependency Injection in Angular
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Why do I need DI?
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DI in Angular
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Configuring an injector
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Defining factories for instantiating services
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Child injectors and visibility
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Summary
6
6. Working with the Angular Router and Forms
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6. Working with the Angular Router and Forms
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Developing the "Coders repository" application
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Exploring the Angular router
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Using Angular's forms module
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Two-way data binding with Angular
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Storing the form data
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Listing all the stored data
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Summary
7
7. Explaining Pipes and Communicating with RESTful Services
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7. Explaining Pipes and Communicating with RESTful Services
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Developing model-driven forms in Angular
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Exploring the HTTP module of Angular
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Defining parameterized views
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Defining nested routes
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Transforming data with pipes
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Summary
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8. Tooling and Development Experience
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8. Tooling and Development Experience
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Running an application in a Web Worker
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Initial load of a SPA
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Enhancing our development experience
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Angular quick starters
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AoT compilation in Angular
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Summary

Hooking into the component's life cycle

Components in Angular have a well-defined life cycle, which allows us to hook into different phases of it and have further control over our application. We can do this by implementing specific methods in the component's controller. In order to be more explicit, thanks to the expressiveness of TypeScript, we can implement different interfaces associated with the life cycle's phases. Each of these interfaces has a single method, which is associated with the phase itself.

Although code written with explicit interface implementation will have better semantics, since Angular supports ES5 as well, within the component we can simply define methods with the same names as the life cycle hooks (but this time, prefixed with ng) and take advantage of duck typing.

The following diagram shows all the phases we can hook into:

Figure 10

Let's take a look at the different life cycle hooks:

  • OnChanges: This hook will be invoked once a change in the input properties of...

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Getting Started with Angular - Second edition
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