Book Image

Angular Cookbook

By : Muhammad Ahsan Ayaz
Book Image

Angular Cookbook

By: Muhammad Ahsan Ayaz

Overview of this book

The Angular framework, powered by Google, is the framework of choice for many web development projects built across varying scales. It’s known to provide much-needed stability and a rich tooling ecosystem for building production-ready web and mobile apps. This recipe-based guide enables you to learn Angular concepts in depth using a step-by-step approach. You’ll explore a wide range of recipes across key tasks in web development that will help you build high-performance apps. The book starts by taking you through core Angular concepts such as Angular components, directives, and services to get you ready for building frontend web apps. You’ll develop web components with Angular and go on to cover advanced concepts such as dynamic components loading and state management with NgRx for achieving real-time performance. Later chapters will focus on recipes for effectively testing your Angular apps to make them fail-safe, before progressing to techniques for optimizing your app’s performance. Finally, you’ll create Progressive Web Apps (PWA) with Angular to provide an intuitive experience for users. By the end of this Angular book, you’ll be able to create full-fledged, professional-looking Angular apps and have the skills you need for frontend development, which are crucial for an enterprise Angular developer.
Table of Contents (15 chapters)

Detaching the change detector from components

In the previous recipe, we learned how to use the OnPush strategy in our components to avoid Angular change detection running unless one of the @Input() bindings has changed. There is, however, another way to tell Angular to not run change detection at all, in any instance. This is handy when you want full control on when to run change detection. In this recipe, you'll learn how to completely detach the change detector from an Angular component to gain performance improvements.

Getting ready

The project for this recipe resides in Chapter12/start_here/detaching-change-detecto:

  1. Open the project in VS Code.
  2. Open the terminal and run npm install to install the dependencies of the project.
  3. Run the ng serve -o command to start the Angular app and serve it on the browser. You should see the app, as follows:

Figure 12.5 – App detaching-change-detector running at http://localhost:4200...