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Accelerating Angular Development with Ivy
Accelerating Angular Development with Ivy

Accelerating Angular Development with Ivy: A practical guide to building faster and more testable Angular apps with the new Ivy engine

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Accelerating Angular Development with Ivy

Chapter 1: Discovering New APIs and Language Syntax

As its only officially supported programming language, Angular is tightly coupled with TypeScript. Support for new versions of TypeScript is introduced with major and minor version releases of Angular. In this chapter, we will explore three powerful language features that have been released in the recent versions of TypeScript and Angular:

  • The optional chaining operator (?.)
  • The nullish coalescing operator (??)
  • Native private class members (#)

Through simple examples, we will highlight the strengths of these modern programming language features. We will even learn how two of the new operators work elegantly together in common scenarios. Learning about this new syntax and semantics is key to understanding the examples throughout this book.

Globalization is the process of supporting and adapting multilingual and regional capabilities in an application. Angular Ivy introduces improved globalization APIs. Together...

Technical requirements

To support all the features introduced in this chapter, your application requires at least the following:

  • Angular Ivy version 9.1
  • TypeScript version 3.8

You can find the complete code examples for the globalization APIs in this book's companion GitHub repository at https://github.com/PacktPublishing/Accelerating-Angular-Development-with-Ivy/tree/main/projects/chapter1/globalization.

Modernizing your code with powerful language features

TypeScript is an integral part of Angular, but because Angular has its own compiler transformations that extend TypeScript's compilation steps, we are inevitably tied to the version of TypeScript that the Angular compiler supports. Fortunately, Angular is good at keeping up with recent versions of TypeScript. In this section, we are going to discuss some of the most noteworthy additions to the TypeScript language in the most recent versions supported by Angular Ivy.

The optional chaining operator

TypeScript version 3.7 introduces a new operator for optional property access, optional element access, and optional calls. The optional chaining operator (?.) short circuits in the case of nullish values – that is, null or undefined – in which case it evaluates to undefined.

Optional chaining is great for working with composite objects or just plain old complex data structures such as large business documents...

Optimizing regional support with improved globalization APIs

Multilingual applications use globalization to give users from different countries and backgrounds a regional experience. Angular has built-in APIs for managing both internationalization and localization. In this section, we will walk through configuration and implementation examples to illustrate some of the new globalization possibilities Ivy brings us.

Bundling localizations

Angular uses locale data for regional variations for formatting dates, currencies, decimal numbers, and percentages. In Angular Ivy, we can bundle a single locale as part of the build by using the localize builder option. Let's say we wanted our application to use the French locale. We can do this by configuring our project build as follows. This also implicitly replaces the value provided for the LOCALE_ID dependency injection token in the @angular/core package:

{
  "projects": {
    "my-app...

Enhancing tests with stronger types and new APIs

For many different types of tests, Angular's TestBed API is both necessary and useful. Ivy introduces a strongly typed API for resolving dependencies through the Angular testing module injector, which can be configured using the static TestBed.configureTestingModule method. In this section, we will explore stronger typing in Angular tests.

Let's also look at an integrated component test for an Angular component using a custom Angular Material SVG icon. This can be done using the FakeMatIconRegistry service that was introduced with Angular Ivy.

Resolving strongly typed dependencies with TestBed.inject

TestBed.get always returns a value of the any type. This static deprecated method has not been deprecated as of Angular version 12, but it could be removed in any major version following that. Its replacement is the type-safe TestBed.inject static method.

Let's look at a couple of simple examples to see the immediate...

Summary

In this first chapter, we discussed the modern language features that were introduced with the recent versions of TypeScript to accompany Angular Ivy. Through simple, common examples, we learned about nullish coalescing and optional chaining. We also identified the differences between TypeScript access modifiers and native private class members, all of which are features that we will make use of throughout the code in this book. By learning about these topics, you can now refactor your existing application or implement new features using these powerful language additions.

Globalization is needed for regional and multilingual support in Angular applications. We covered the basics of configuring multiple locales for our Angular build process. After that, we discovered our newfound ability to lazy load locale data such as regional number, currency, and date formats, as well as directionality information.

To demonstrate runtime locale switching, we created a locale picker...

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Key benefits

  • Upgrade your Angular applications from traditional View Engine to modern Angular Ivy
  • Get a detailed walkthrough of the new features and breaking changes in Angular
  • Explorer new Angular APIs, syntax, tooling, and configurations for modern frontend web development

Description

Angular Ivy is the latest rendering engine and compiler introduced in Angular. Ivy helps frontend developers to make their Angular applications faster, better optimized, and more robust. This easy-to-follow guide will help you get to grips with the new features of Angular Ivy and show you how to migrate your Angular apps from View Engine to Ivy. You'll begin by learning about the most popular features of Angular Ivy with the help of simple stand-alone examples and realize its capabilities by working on a real-world application project. You'll then discover strategies to improve your developer workflow through new debugging APIs, testing APIs, and configurations that support higher code quality and productive development features. Throughout the book, you'll explore essential components of Angular, such as Angular Component Dev Kit (CDK), Ahead-of-time (AOT) compilation, and Angular command line interface (CLI). Finally, you'll gain a clear understanding of these components along with Angular Ivy which will help you update your Angular applications with modern features. By the end of this Angular Ivy book, you will learn about the core features of Angular Ivy, discover how to migrate your Angular View Engine application, and find out how to set up a high-quality Angular Ivy project.

Who is this book for?

This book is for experienced Angular web developers who want to migrate to the latest Ivy engine for building faster web applications. Intermediate knowledge of Angular and TypeScript will help you get the most out of this book.

What you will learn

  • Find out why Angular Ivy tests are faster and more robust
  • Explore the concept of CSS custom properties and scoping of values and learn how to use them with Angular Ivy
  • Use testing harnesses present in Angular components to write effective tests
  • Explore the architecture of the Angular compatibility compiler and understand why it is important
  • Discover effective techniques for migrating your existing Angular apps to the Ivy engine
  • Overcome challenges that you might face when switching to AOT compilation
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Table of Contents

13 Chapters
Chapter 1: Discovering New APIs and Language Syntax Chevron down icon Chevron up icon
Chapter 2: Boosting Developer Productivity Through Tooling, Configuration, and Convenience Chevron down icon Chevron up icon
Chapter 3: Introducing CSS Custom Properties and New Provider Scopes Chevron down icon Chevron up icon
Chapter 4: Exploring Angular Components Features Chevron down icon Chevron up icon
Chapter 5: Using CSS Custom Properties Chevron down icon Chevron up icon
Chapter 6: Using Angular Components Chevron down icon Chevron up icon
Chapter 7: Component Harnesses Chevron down icon Chevron up icon
Chapter 8: Additional Provider Scopes Chevron down icon Chevron up icon
Chapter 9: Debugging with the New Ivy Runtime APIs Chevron down icon Chevron up icon
Chapter 10: Using the Angular Compatibility Compiler Chevron down icon Chevron up icon
Chapter 11: Migrating Your Angular Application from View Engine to Ivy Chevron down icon Chevron up icon
Chapter 12: Embracing Ahead-of-Time Compilation Chevron down icon Chevron up icon
Other Books You May Enjoy Chevron down icon Chevron up icon

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Brandon Roberts Nov 22, 2021
Full star icon Full star icon Full star icon Full star icon Full star icon 5
The book is definitely very comprehensive in helping explain Ivy and how you can get the most use out of Angular going forward. As an Angular developer and maintainer of Angular libraries, I can't recommend it enough for current and new Angular developers.
Amazon Verified review Amazon
Eduard Stefanescu Jan 26, 2022
Full star icon Full star icon Full star icon Full star icon Full star icon 5
This book delves deeply into Ivy and how to make the most of Angular's new features. Even whether you're using an older or newer version of Angular, this will help you comprehend the potential of Ivy and why it's important to upgrade your projects soon (if possible).The book covers many Angular Ivy features that are not even mentioned in the official documentation. As a result, the authors dedicated their time to research and describe all of the little details. In addition to Angular, the authors introduced the latest TypeScript 3.8 features. This is fantastic since, in my opinion, this is all you need to realize the value that Angular Ivy and the new TypeScript version bring.My favorite section is, of course, the second, in which the authors provide guidance on how to develop, debug, and use Angular Ivy capabilities to create an application.Having said that, Accelerating Angular Development with Ivy by Lars Gyrup Brink Nielsen and Jacob Andresen is an essential must-read for any Angular developer.
Amazon Verified review Amazon
Sani Yusuf Nov 22, 2021
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Lars covers topics in the books that are normally difficult to grasp in a very simple way.The concepts covered in this book use very practical samples especially with very misunderstood concepts like tooling.The author also introduces the IVY compiler with good enough depth and details that make it easy for anyone to leverage its true power.
Amazon Verified review Amazon
Patrick Jun 10, 2022
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The book not only covers Ivy, but also covers many other performance & code style improvements that can be added.For instance many developers are not using nullish coalescing or optional chaining -- which make the code more readable & less error prone.If you've finally gotten to the point of upgrading your Angular application to a version that no longer supports the old rendering engine then it's a great time to really go deep and understand Ivy and the related improvements that have been added over the last few versions (book covers v9 to v12).You will see a drastic improvement to your apps performance, and less bugs in prod.I also like how there are real world examples used to illustrate use cases.One thing I did not like was the code style formatting, it's very dark & can be hard to read (I have a print copy).
Amazon Verified review Amazon
Ajit Singh Nov 01, 2021
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I really like the way the book was framed after each chapter there is an example app which you can use and run from Github. It is really good for an Angular developer looking to improve his knowledge
Amazon Verified review Amazon
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