Book Image

Learning Angular - Fourth Edition

By : Aristeidis Bampakos, Pablo Deeleman
5 (1)
Book Image

Learning Angular - Fourth Edition

5 (1)
By: Aristeidis Bampakos, Pablo Deeleman

Overview of this book

As Angular continues to reign as one of the top JavaScript frameworks, more developers are seeking out the best way to get started with this extraordinarily flexible and secure framework. Learning Angular, now in its fourth edition, will show you how you can use it to achieve cross-platform high performance with the latest web techniques, extensive integration with modern web standards, and integrated development environments (IDEs). The book is especially useful for those new to Angular and will help you to get to grips with the bare bones of the framework to start developing Angular apps. You'll learn how to develop apps by harnessing the power of the Angular command-line interface (CLI), write unit tests, style your apps by following the Material Design guidelines, and finally, deploy them to a hosting provider. Updated for Angular 15, this new edition covers lots of new features and tutorials that address the current frontend web development challenges. You’ll find a new dedicated chapter on observables and RxJS, more on error handling and debugging in Angular, and new real-life examples. By the end of this book, you’ll not only be able to create Angular applications with TypeScript from scratch, but also enhance your coding skills with best practices.
Table of Contents (17 chapters)
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Transforming elements using directives

The Angular framework includes a set of ready-made structural directives that we can start using straight away in our applications:

  • ngIf: Adds or removes a portion of the DOM tree based on an expression
  • ngFor: Iterates through a list of items and binds each item to a template
  • ngSwitch: Switches between templates within a specific set and displays each one depending on a condition

We will describe each one of them in the following sections.

Displaying data conditionally

The ngIf directive adds or removes an HTML element in the DOM based on the evaluation of an expression. If the expression evaluates to true, the element is inserted into the DOM. Otherwise, the element is removed from the DOM.

Do you recall from the previous chapter that the product details component was loaded even if there was no product selected? We can now fix that issue by binding...