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Learning Angular - Fourth Edition

You're reading from  Learning Angular - Fourth Edition

Product type Book
Published in Feb 2023
Publisher Packt
ISBN-13 9781803240602
Pages 446 pages
Edition 4th Edition
Languages
Authors (2):
Aristeidis Bampakos Aristeidis Bampakos
Profile icon Aristeidis Bampakos
Pablo Deeleman Pablo Deeleman
Profile icon Pablo Deeleman
View More author details

Table of Contents (17) Chapters

Preface Building Your First Angular Application Introduction to TypeScript Organizing Application into Modules Enabling User Experience with Components Enrich Applications Using Pipes and Directives Managing Complex Tasks with Services Being Reactive Using Observables and RxJS Communicating with Data Services over HTTP Navigating through Application with Routing Collecting User Data with Forms Introduction to Angular Material Unit Test an Angular Application Bringing an Application to Production Handling Errors and Application Debugging Other Books You May Enjoy
Index

Introducing the component lifecycle

Lifecycle events are hooks that allow us to jump into specific stages in the lifecycle of a component and apply custom logic. They are optional to use but might be of valuable help if you understand how to use them.

Some hooks are considered best practices, while others help debug and understand what happens in an Angular application. A hook comes with an interface that defines a method we need to implement. The Angular framework ensures the hook is called, provided we have implemented this method in the component.

Defining the interface in the component is not obligatory, but it is considered a good practice. Angular cares only about whether we have implemented the actual method or not.

The most basic lifecycle hooks of an Angular component are:

  • OnInit: This is called when a component is initialized
  • OnDestroy: This is called when a component is destroyed
  • OnChanges: This is called when...
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