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Angular 2 Cookbook

You're reading from   Angular 2 Cookbook Discover over 70 recipes that provide the solutions you need to know to face every challenge in Angular 2 head on

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Product type Paperback
Published in Jan 2017
Publisher Packt
ISBN-13 9781785881923
Length 464 pages
Edition 1st Edition
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Authors (2):
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Matthew Frisbie Matthew Frisbie
Author Profile Icon Matthew Frisbie
Matthew Frisbie
Patrick Gillespie Patrick Gillespie
Author Profile Icon Patrick Gillespie
Patrick Gillespie
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Toc

Table of Contents (11) Chapters Close

Preface 1. Strategies for Upgrading to Angular 2 2. Conquering Components and Directives FREE CHAPTER 3. Building Template-Driven and Reactive Forms 4. Mastering Promises 5. ReactiveX Observables 6. The Component Router 7. Services, Dependency Injection, and NgModule 8. Application Organization and Management 9. Angular 2 Testing 10. Performance and Advanced Concepts

Listening for NgZone events


With the introduction of Angular 2 comes the concept of zones. Before you begin this recipe, I strongly recommended you to begin by working through the Working with zones outside Angular recipe.

zone.js

zone.js is a library that Angular 2 directly depends upon. It allows Angular to be built upon a zone that allows the framework to intimately manage its execution context.

More plainly, this means that Angular can tell when asynchronous things are happening that it might care about. If this sounds a bit like how $scope.apply() was relevant in Angular 1.x, you are thinking in the right way.

NgZone

Angular 2's integration with zones takes the form of the NgZone service, which acts as a sort of wrapper for the actual Angular zones. This service exposes a useful API that you can tap into.

Note

The code, links, and a live example related to this recipe are available at http://ngcookbook.herokuapp.com/8676/.

Getting ready

All that is needed for this recipe is a component into...

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