精通Angular 2：构建动态应用的实战指南

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"《Pro Angular, 2nd Edition》是一本专为Web开发者设计的权威指南，作者是Adam Freeman，该书针对的是对HTML和JavaScript有一定基础的专业人士，目标是帮助他们充分利用Angular 2这一领先的动态JavaScript应用程序框架。本书深入浅出地介绍了Model-View-Controller (MVC) 设计模式，让读者理解其在构建复杂应用中的核心价值。首先，作者会引导读者了解MVC模式的基本概念和优势，使开发者建立起坚实的架构理解。随后，从基础语法和组件构建开始，一步步带领读者掌握Angular 2的开发实践，包括如何创建丰富的、动态的网页客户端应用。书中详细解释了如何利用Angular 2的各种特性，如指令、服务、管道等，以及如何进行应用扩展和定制，确保开发人员能够灵活应对项目需求。除了技术层面的内容，作者还会关注常见问题的解决方案，提供避免陷阱的实用建议，确保学习者能够高效、稳健地开发和测试Angular 2项目。此外，本书不仅适用于初学者，也适合有一定经验的开发者提升现有技能，紧跟Angular 2的发展潮流。通过阅读这本书，读者可以收获以下关键技能： 1. 深入理解MVC模式在Angular 2中的实际应用。 2. 掌握Angular 2的开发工具链和最佳实践。 3. 学习如何构建高效、可维护的前端应用。 4. 熟悉如何调试和优化性能，以及进行单元测试和集成测试。 5. 了解如何适应Angular 2的更新和生态系统扩展。《Pro Angular, 2nd Edition》是一本全面且实用的Angular 2教程，无论你是新手还是寻求进阶的开发者，都能从中找到所需的知识和技能，助你在现代Web开发领域取得成功。"

■ Contents

xvi

■Chapter 15: Creating Attribute Directives �� 337

Preparing the Example Project �� 338

Creating a Simple Attribute Directive �� 340

Applying a Custom Directive ��341

Accessing Application Data in a Directive �� 343

Reading Host Element Attributes �� 343

Creating Data-Bound Input Properties ��346

Responding to Input Property Changes �� 349

Creating Custom Events �� 351

Binding to a Custom Event �� 353

Creating Host Element Bindings �� 354

Creating a Two-Way Binding on the Host Element �� 355

Exporting a Directive for Use in a Template Variable �� 359

Summary �� 362

■Chapter 16: Creating Structural Directives �� 363

Preparing the Example Project �� 364

Creating a Simple Structural Directive �� 365

Implementing the Structural Directive Class �� 366

Enabling the Structural Directive ��368

Using the Concise Structural Directive Syntax ��370

Creating Iterating Structural Directives �� 371

Providing Additional Context Data �� 374

Using the Concise Structure Syntax ��376

Dealing with Property-Level Data Changes �� 377

Dealing with Collection-Level Data Changes �� 379

Querying the Host Element Content �� 390

Querying Multiple Content Children �� 394

Receiving Query Change Notiﬁcations �� 396

Summary �� 397

■ Contents

xvii

■Chapter 17: Understanding Components �� 399

Preparing the Example Project �� 400

Structuring an Application with Components �� 401

Creating New Components �� 402

Deﬁning Templates ��406

Completing the Component Restructure ��417

Using Component Styles �� 417

Deﬁning External Component Styles �� 419

Using Advanced Style Features �� 420

Querying Template Content �� 428

Summary �� 431

■Chapter 18: Using and Creating Pipes �� 433

Preparing the Example Project �� 434

Installing the Internationalization Polyﬁll �� 436

Understanding Pipes �� 439

Creating a Custom Pipe �� 440

Registering a Custom Pipe �� 441

Applying a Custom Pipe �� 442

Combining Pipes �� 443

Creating Impure Pipes ��444

Using the Built-in Pipes �� 448

Formatting Numbers �� 449

Formatting Currency Values �� 451

Formatting Percentages �� 454

Formatting Dates �� 456

Changing String Case �� 459

Serializing Data as JSON �� 460

Slicing Data Arrays �� 461

Summary �� 463

■ Contents

xviii

■Chapter 19: Using Services �� 465

Preparing the Example Project �� 466

Understanding the Object Distribution Problem �� 467

Demonstrating the Problem ��467

Distributing Objects as Services Using Dependency Injection �� 472

Declaring Dependencies in Other Building Blocks ��478

Understanding the Test Isolation Problem �� 484

Isolating Components Using Services and Dependency Injection �� 485

Completing the Adoption of Services �� 488

Updating the Root Component and Template �� 488

Updating the Child Components �� 489

Summary �� 491

■Chapter 20: Using Service Providers �� 493

Preparing the Example Project �� 494

Using Service Providers �� 496

Using the Class Provider ��498

Using the Value Provider ��506

Using the Factory Provider �� 508

Using the Existing Service Provider �� 511

Using Local Providers �� 512

Understanding the Limitations of Single Service Objects�� 513

Creating Local Providers in a Directive ��514

Creating Local Providers in a Component ��516

Controlling Dependency Resolution ��521

Summary �� 523

■Chapter 21: Using and Creating Modules �� 525

Preparing the Example Project �� 526

Understanding the Root Module �� 528

Understanding the Imports Property �� 530

Understanding the Declarations Property ��530

■ Contents

xix

Understanding the Providers Property ��531

Understanding the Bootstrap Property ��531

Creating Feature Modules �� 533

Creating a Model Module ��535

Creating a Utility Feature Module ��539

Creating a Feature Module with Components ��545

Summary �� 549

■Chapter 22: Creating the Example Project �� 551

Starting the Example Project �� 551

Adding and Conﬁguring the Packages �� 552

Conﬁguring TypeScript��553

Conﬁguring the Development HTTP Server �� 553

Conﬁguring the JavaScript Module Loader ��554

Creating the Model Module �� 554

Creating the Product Data Type ��554

Creating the Data Source and Repository �� 555

Completing the Model Module �� 556

Creating the Core Module �� 557

Creating the Shared State Service �� 557

Creating the Table Component ��557

Creating the Form Component �� 559

Completing the Core Module ��561

Creating the Messages Module �� 562

Creating the Message Model and Service �� 562

Creating the Component and Template ��563

Completing the Message Module �� 563

Completing the Project �� 564

Creating the Angular Bootstrap �� 564

Creating the Reactive Extensions Module ��565

Creating the HTML Document ��565

■ Contents

Running the Example Project �� 566

Summary �� 567

■Chapter 23: Using Reactive Extensions �� 569

Preparing the Example Project �� 570

Understanding the Problem �� 571

Solving the Problem with Reactive Extensions �� 573

Understanding Observables �� 574

Understanding Observers �� 576

Understanding Subjects �� 577

Using the Async Pipe �� 578

Using the Async Pipe with Custom Pipes �� 579

Scaling Up Application Feature Modules �� 581

Going Beyond the Basics �� 584

Filtering Events �� 585

Transforming Events �� 586

Receiving Only Distinct Events �� 589

Taking and Skipping Events ��591

Summary �� 592

■Chapter 24: Making Asynchronous HTTP Requests �� 593

Preparing the Example Project �� 594

Conﬁguring the JavaScript Module Loader ��595

Conﬁguring the Model Feature Module ��596

Updating the Form Component �� 597

Running the Example Project �� 597

Understanding RESTful Web Services �� 598

Replacing the Static Data Source �� 599

Creating the New Data Source Service �� 600

Conﬁguring the Data Source��602

Using the REST Data Source ��603

Saving and Deleting Data ��605

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