精通AngularJS：Ari Lerner的完整指南

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"Ari Lerner 的《The Complete Book on Angular》是关于 AngularJS 的全面指南，旨在帮助读者在较短的时间内掌握整个框架，并提供最佳实践和工具，以提高开发效率。作者 Ari Lerner 提供了完整示例，以便开发者无需进行大量研究即可启动项目。" 在这本专著中，Ari Lerner 深入探讨了 AngularJS 的核心概念和技术，包括： 1. **数据绑定**：AngularJS 的核心特性之一是数据绑定，它将视图与模型之间的交互自动化。书中介绍了数据绑定的基本概念，如： - **简单数据绑定**：展示了如何通过双大括号语法（{{ }}）实现视图和模型之间的双向通信。 - **最佳数据绑定实践**：讨论了如何有效地使用数据绑定，以避免潜在的问题并优化性能。 2. **模块**（Modules）：AngularJS 应用由模块构成，它们定义了应用的结构和依赖。书中解释了如何创建和使用模块，以及模块如何帮助组织代码和管理应用组件。 3. **属性**（Properties）：属性是模块和指令中的数据成员，用于存储和传递信息。书中的这部分内容可能涉及如何声明和访问这些属性。 4. **作用域**（Scopes）：作用域是 AngularJS 中的数据模型，它连接了控制器和视图。作者会介绍： - **$scope 视图**：作用域作为应用中的数据模型，它是控制器和视图之间的桥梁。 - **HTML 只是 HTML**：强调 AngularJS 如何通过扩展 HTML 来实现数据绑定和行为。 - **作用域能做什么？**：涵盖了作用域的各种功能，如事件处理、watcher 和继承等。 5. **浏览器基础**：为了更好地理解 AngularJS，书中还会回顾 Web 页面如何到达浏览器的基本原理，包括浏览器的角色和工作方式。 6. **AngularJS 介绍**：这部分将阐述 AngularJS 是什么，以及它如何解决传统 web 开发中的问题，比如通过 MVC 架构实现动态和响应式的 web 应用。除了这些基本概念，书中可能还涵盖了其他高级主题，如服务（Services）、指令（Directives）、过滤器（Filters）、路由（Routing）、依赖注入（Dependency Injection）以及测试和调试技巧。这些内容有助于读者全面理解和掌握 AngularJS 框架，从而高效地构建现代 web 应用。通过阅读这本书，开发者不仅能学习到 AngularJS 的核心技术，还能了解到 Ari Lerner 推荐的最佳实践和工具，以提高开发效率和代码质量。这本书是 AngularJS 学习者和开发者的重要参考资料。

Introduction 4

Additional Resources

We’ll refer to the official documentation on the AngularJS⁷ website. The official AngularJS docu-

mentation is a great resource, and we’ll be using it quite often.

We suggest that you take a look at the AngularJS API documentation, as it gives you direct access to

the recommended methods of writing AngularJS applications. Of course, it also gives you the most

up-to-date documentation available.

Conventions Used in This Book

Throughout this book, you will see the following typographical conventions that indicate different

types of information:

In-line code references will look like: <h1>Hello</h1>.

A block of code looks like so:

var App = angular.module('App', []);

function FirstController($scope) {

$scope.data = "Hello";

}

Any command at the command line will look like:

$ ls -la

Any command in the developer console in Chrome (the browser with which we will primarily be

developing) will look like:

> var obj = {message: "hello"};

Important words will be shown in bold.

Tips and tricks will be shown as:

Tip

Tip: This is a tip message

⁷http://angularjs.org

The Basics of AngularJS

The goal of this chapter is to get you comfortable with the terminology and the technology and to

give you an understanding of how AngularJS works. We’ll start putting the pieces together to enable

you to build an AngularJS application, even if you’ve never written one before.

How Web Pages Get to Your Browser

Let’s think of the Internet as a post office. When you want to send a letter to your friend, you first

write your message on a piece of paper. Then you write your friend’s address on an envelope and

place the letter inside of it.

When you drop the letter off at the post office, the mail sorter looks at the postal code and address

and tries to find where your friend lives. If she lives in a giant apartment complex, the postal service

might deliver the mail to your friend’s front desk and let the building’s employees sort it out by

apartments.

The Internet works in a similar way. Instead of a bunch of houses and apartments connected by

streets, it is a bunch of computers connected by routers and wire. Every computer has a unique

address that tells the network how to reach it.

Similar to the apartment building analogy above, where we have many apartments that share the

same address, several computers can exist on the same network or router (as when you connect to

WiFi at a Starbucks). In this case, your computer shares the same IP address as the other computers.

Your computer can be reached individually, however, by its “internal IP address” (like the apartment

number in our analogy), about which the router is aware (as the apartment building employees in

our analogy are aware of your friend’s apartment number).

IP stands for Internet Protocol. An IP address is a numerical identifier assigned to each

device participating in a network. Computers, printers, and even cell phones have IP

addresses.

There are two main types of IP addresses: ipv4 and ipv6 addresses. The most common

addresses today are ipv4 addresses. These look like 192.168.0.199. Ipv6 addresses look

like 2001:0db8:0000:0000:0000:ff00:0042:8329.

When you open your web browser on your computer and type in http://google.com, your web

browser “asks” the internet (more precisely, it “asks” a DNS server) where google.com’s address

is. If the DNS server knows the IP address you’re looking for, it responds with the address. If not,

it passes the request along to other DNS servers until the IP address is found and served to your

computer. You can see the DNS server response by typing this code into a terminal:

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