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Learning Angular, Fourth Edition

You're reading from   Learning Angular, Fourth Edition A no-nonsense guide to building web applications with Angular 15

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Product type Paperback
Published in Feb 2023
Publisher Packt
ISBN-13 9781803240602
Length 446 pages
Edition 4th Edition
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Authors (2):
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Pablo Deeleman Pablo Deeleman
Author Profile Icon Pablo Deeleman
Pablo Deeleman
Aristeidis Bampakos Aristeidis Bampakos
Author Profile Icon Aristeidis Bampakos
Aristeidis Bampakos
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Toc

Table of Contents (17) Chapters Close

Preface 1. Building Your First Angular Application FREE CHAPTER 2. Introduction to TypeScript 3. Organizing Application into Modules 4. Enabling User Experience with Components 5. Enrich Applications Using Pipes and Directives 6. Managing Complex Tasks with Services 7. Being Reactive Using Observables and RxJS 8. Communicating with Data Services over HTTP 9. Navigating through Application with Routing 10. Collecting User Data with Forms 11. Introduction to Angular Material 12. Unit Test an Angular Application 13. Bringing an Application to Production 14. Handling Errors and Application Debugging 15. Other Books You May Enjoy
16. Index

Manipulating data with pipes

Pipes allow us to transform the outcome of our expressions at the view level. They take data as input, transform it into the desired format, and display the output in the template.

The syntax of a pipe is pretty simple, consisting of the pipe name following the expression we want to transform, separated by a pipe symbol (|). Pipes are usually used with interpolation in Angular templates and can be chained to each other. Angular has a wide range of pipe types already baked into it.

Before moving on to explore some of the built-in Angular pipes, we will make a change to our Angular working application to demonstrate their use better. The products array in the product list component is currently an array of string values. We will convert it into an array of product objects using interfaces:

  1. Run the following Angular CLI command inside the src\app\products folder to create a product interface:
    ng generate interface product...
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