循序渐进掌握Angular：从入门到实战指南

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《Angular: Up and Running: Learning Angular, Step by Step》是一本旨在帮助读者理解和掌握Angular框架的实用指南。作者Shyam Seshadri以其深入浅出的方式，将复杂的技术分解成易于理解的概念，让初学者能够逐步学习并构建可扩展的Angular应用程序。本书结构清晰，每个章节专注于一个特定的Angular概念，并通过丰富的实例来展示其工作原理。这种循序渐进的教学方法使得学习过程既系统又有实践性。每章末尾的练习题和答案，不仅巩固了读者对所学知识的理解，还提供了实际操作Angular的机会，以便于读者在实践中提升技能。 Angular是JavaScript开发中的一个重要框架，它支持单页应用（SPA）的构建，强调组件化开发、依赖注入和指令等核心特性。《Up and Running》涵盖了Angular的基础到高级主题，包括但不限于模板语法、模块系统、指令、服务、表单处理、路由导航以及指令的自定义。书中的内容不仅适合零基础的开发者入门，也适合有一定经验的开发者提升对Angular框架的熟练度。该书的出版地包括美国的波士顿、法纳姆、塞巴斯托波尔、东京和北京，体现了其全球化的定位和广泛的读者群体。版权信息表明，所有权利归Shyam Seshadri所有，且适用于教育、商业或销售推广用途。O'Reilly Media作为出版社，提供了在线版本供用户选择，并提供联系方式以获取更多关于机构或企业购买的信息。对于初次接触Angular或者希望进一步提升技能的开发者来说，《Angular: Up and Running》无疑是一本重要的参考资料，它不仅提供了理论知识，更通过实例驱动的方式确保读者能够在实践中真正掌握Angular的核心技术和最佳实践。随着不断更新和修订，这本书持续适应Angular框架的发展，保持其内容的时效性和实用性。

For more information about our books, courses, conferences, and news, see our web‐

site at http://www.oreilly.com.

Find us on Facebook: http://facebook.com/oreilly

Watch us on YouTube: http://www.youtube.com/oreillymedia

Acknowledgments

This book is dedicated to my wife, Sanchita, and my parents and grandmom who

were my rock as well as my motivation to write this book in the best manner I could,

all the while balancing my own fledgling startup in its most precarious time (the

beginning!).

I’d also like to thank my reviewers, Yakov Fain and Victor Mejia, who had to read and

review my unedited ramblings and make sure I got my point across in the most suc‐

cinct and understandable terms.

This book of course wouldn’t be possible without the faith and efforts of the awesome

team at O’Reilly, especially Angela and Kristen!

And finally, thank you to the amazing Angular community for all their contributions,

feedback, and support, and for teaching us how to use and make it better.

Introduction | xv

Why Angular

Angular as a framework provides a few significant advantages while also providing a

common structure for developers on a team to work with. It allows us to develop

large applications in a maintainable manner. We will dig into each one of these in

more detail in the following chapters:

Custom components

Angular allows you to build your own declarative components that can pack

functionality along with its rendering logic into bite-sized, reusable pieces. It also

plays well with web components.

Data binding

Angular allows you to seamlessly move your data from your core JavaScript code

to the view, and react to view events without having to write the glue code your‐

self.

Dependency injection

Angular allows you to write modular services, and have them injected wherever

they are needed. This greatly improves the testability and reusability of the same.

Testing

Tests are first-class citizens, and Angular has been built from the ground up with

testability in mind. You can (and should!) test every part of your application.

Comprehensive

Angular is a full-fledged framework, and provides out-of-the-box solutions for

server communication, routing within your application, and more.

Angular as a framework has adopted semantic versioning for all

new releases. Furthermore, the core team has an aggressive road‐

map, with a new major release planned every six months. Thus,

what started off as Angular 2 is now referred to as just Angular,

since we don’t want to call them Angular 2, Angular 4, Angular 5,

and so on.

That said, unlike AngularJS to Angular, upgrading between ver‐

sions of Angular (say 2 to 4, etc.) is an incremental step, and more

often than not an almost trivial upgrade. So you don’t need to

worry about having to do a major upgrade every few months with

drastic code changes.

What This Book Will Not Cover

While Angular as a framework is quite large, the community around it is even larger.

A lot of great features and options for use with Angular in fact stem from this

2 | Chapter 1: Introducing Angular

community. This makes life harder as an author to figure out how to write a book

that preps you, the reader, as an Angular developer, while still limiting the scope to

what I think are the essentials.

To that extent, while Angular can be extended in so many ways, from writing native

mobile apps using Angular (see NativeScript), rendering your Angular application on

the server (see Angular Universal), using Redux as a first-class option in Angular

(multiple options; see ngrx), and many more, the initial version of the book will only

focus on the core Angular platform and all the capabilities it provides. It will also

strive to focus on the more common cases rather than cover every single feature and

capability of Angular, as such a book would run into thousands of pages.

The intention is to focus on the parts that will be necessary and useful to all Angular

developers, rather than focus on bits and parts that would be useful to a subset.

Getting Started with Your Development Environment

Angular expects you to do a fair bit of groundwork to be able to develop seamlessly

on your computer. Certain prerequisites need to be installed that we will cover in this

section.

Node.js

While you will never be coding in Node.js, Angular uses Node.js as its base for a large

part of its build environment. Thus, to get started with Angular, you will need to have

Node.js installed on your environment. There are multiple ways to install Node.js, so

please refer to the Node.js Download Page for more instructions.

On macOS, installing Node.js through Homebrew has been known

to cause some issues. So try installing it directly if you run into any

problems.

You need to install version 6.9.0 or above of Node.js, and version 3.0.0 or above of

npm. You can confirm your versions after installing by running the following

commands:

node --version

npm --v

TypeScript

TypeScript adds a set of types to the JavaScript code that we write, allowing us to

write JavaScript that is easier to understand, reason about, and trace. It ensures that

the latest proposed ECMAScript features are also available at the tip of our fingers. At

Getting Started with Your Development Environment | 3

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循序渐进掌握Angular：从入门到实战指南

Angular.Up.and.Running.2018.6

Angular: Up and Running: Learning Angular, Step by Step2018

learning-angular:学习Angular（不是AngularJS）

Angular：Angular项目

blog-angular：:megaphone:Angular4 + koa2实现的个人博客，Angular博客

learning_angular：Projet人员的基本要求是：

_learn-angular::trophy:学习角度

learning-angular:我在哪里学习角度

helloAngular:helloAngular

angular:开源Angular库

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