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Expert Angular

You're reading from   Expert Angular Build deep understanding of Angular to set you apart from the developer crowd

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Product type Paperback
Published in Jul 2017
Publisher Packt
ISBN-13 9781785880230
Length 454 pages
Edition 1st Edition
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Authors (4):
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Sridhar Rao Chivukula Sridhar Rao Chivukula
Author Profile Icon Sridhar Rao Chivukula
Sridhar Rao Chivukula
Mathieu Nayrolles Mathieu Nayrolles
Author Profile Icon Mathieu Nayrolles
Mathieu Nayrolles
Alexandru Vasile Pop Alexandru Vasile Pop
Author Profile Icon Alexandru Vasile Pop
Alexandru Vasile Pop
Rajesh Gunasundaram Rajesh Gunasundaram
Author Profile Icon Rajesh Gunasundaram
Rajesh Gunasundaram
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Toc

Table of Contents (18) Chapters Close

Preface 1. Architectural Overview and Building a Simple App in Angular 2. Migrating AngularJS App to Angular App FREE CHAPTER 3. Using Angular CLI to Generate Angular Apps with Best Practices 4. Working with Components 5. Implementing Angular Routing and Navigation 6. Creating Directives and Implementing Change Detection 7. Asynchronous Programming Using Observables 8. Template and Data Binding Syntax 9. Advanced Forms in Angular 10. Material Design in Angular 11. Implementing Angular Pipes 12. Implementing Angular Services 13. Applying Dependency Injection 14. Handling Angular Animation 15. Integrating Bootstrap with Angular Application 16. Testing Angular Apps Using Jasmine and Protractor Frameworks 17. Design Patterns in Angular

Route Guards

Route Guards let you control various stages of a route navigation. While navigating from one component to another, we need to make sure that the data that will be displayed is authorized for the user, and if not, cancel the navigation.

A Router Guard can return an Observable<boolean> or a Promise<boolean>, and the router will wait for Observable to resolve to either true or false:

  • If the Route Guard returns true, it will proceed with the navigation and display the view
  • If the Route Guard returns false, it will abort/cancel the navigation

There are various Route Guards we can use either independently or in combinations. They are as follows:

  • canActivate
  • canActivateChild
  • canDeactivate
  • Resolve
  • canLoad

The guard function can accept parameters to make a better decision. The parameters we can pass are as follows:

  • component: The custom components directives...
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