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JavaScript Web Applications

Год: August 30, 2011
Автор: Alex MacCaw
Жанр: Web программирование
Издательство: O'Reilly Media
ISBN: 144930351X
Язык: Английский
Формат: PDF
Качество: Изначально компьютерное (eBook)
Количество страниц: 280

Описание:
Building rich JavaScript applications that bring a desktop experience to the Web requires moving state from the server to the client side—not a simple task. This hands-on book takes proficient JavaScript developers through all the steps necessary to create state-of-the-art applications, including structure, templating, frameworks, communicating with the server, and many other issues.

Throughout the book, you'll work with real-world example applications to help you grasp the concepts involved. Learn how to create JavaScript applications that offer a more responsive and improved experience.

Use the Model-View-Controller (MVC) pattern, and learn how to manage dependencies inside your application
Get an introduction to templating and data binding
Learn about loading remote data, Ajax, and cross-domain requests
Create realtime applications with WebSockets and Node.js
Accept dropped files and upload data with progress indicators
Use major frameworks and libraries, including jQuery, Spine, and Backbone
Write tests and use the console to debug your applications
Get deployment best practices, such as caching and minification

1. MVC and Classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Early Days 1
Adding Structure 2
What Is MVC? 2
The Model 3
The View 4
The Controller 5
Toward Modularity, Creating Classes 6
Adding Functions to Classes 7
Adding Methods to Our Class Library 8
Class Inheritance Using Prototype 10
Adding Inheritance to Our Class Library 11
Function Invocation 12
Controlling Scope in Our Class Library 14
Adding Private Functions 16
Class Libraries 16
2. Events and Observing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Listening to Events 19
Event Ordering 20
Canceling Events 21
The Event Object 21
Event Libraries 23
Context Change 24
Delegating Events 24
Custom Events 25
Custom Events and jQuery Plug-Ins 25
Non-DOM Events 27
3. Models and Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . 31
MVC and Namespacing 31
Building an ORM 32
Prototypal Inheritance 33
Adding ORM Properties 34
Persisting Records 35
Adding ID Support 36
Addressing References 37
Loading in Data 38
Including Data Inline 39
Loading Data with Ajax 39
JSONP 43
Security with Cross-Domain Requests 43
Populating Our ORM 44
Storing Data Locally 44
Adding Local Storage to Our ORM 46
Submitting New Records to the Server 47

4. Controllers and State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Module Pattern 50
Global Import 50
Global Export 50
Adding a Bit of Context 51
Abstracting into a Library 52
Loading Controllers After the Document 53
Accessing Views 55
Delegating Events 56
State Machines 58
Routing 60
Using the URL’s Hash 60
Detecting Hash Changes 61
Ajax Crawling 62
Using the HTML5 History API 63

5. Views and Templating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Dynamically Rendering Views 65
Templates 66
Template Helpers 68
Template Storage 69
Binding 70
Binding Up Models 71
6. Dependency Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
CommonJS 74
Declaring a Module 74
Modules and the Browser 75
Module Loaders 76
Yabble 76
RequireJS 77
Wrapping Up Modules 78
Module Alternatives 79
LABjs 80
FUBCs 80

7. Working with Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Browser Support 81
Getting Information About Files 81
File Inputs 82
Drag and Drop 83
Dragging 84
Dropping 85
Cancel Default Drag/Drop 86
Copy and Paste 87
Copying 87
Pasting 88
Reading Files 89
Blobs and Slices 90
Custom Browse Buttons 91
Uploading Files 91
Ajax Progress 93
jQuery Drag and Drop Uploader 95
Creating a Drop Area 95
Uploading the File 95

8. The Real-Time Web . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . 97
Real Time’s History 97
WebSockets 98
Node.js and Socket.IO 101
Real-Time Architecture 103
Perceived Speed 105

9. Testing and Debugging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Unit Testing 109
Assertions 109
QUnit 110
Jasmine 113
Drivers 115
Headless Testing 118
Zombie 119
Ichabod 121
Distributed Testing 121
Providing Support 122
Inspectors 122
Web Inspector 123
Firebug 124
The Console 125
Console Helpers 126
Using the Debugger 127
Analyzing Network Requests 128
Profile and Timing 129

10. Deploying . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . 133
Performance 133
Caching 134
Minification 136
Gzip Compression 137
Using a CDN 138
Auditors 138
Resources 139

11. The Spine Library . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Setup 141
Classes 142
Instantiation 142
Extending Classes 143
Context 144
Events 145
Models 145
Fetching Records 147
Model Events 147
Validation 148
Persistence 148
Controllers 150
Proxying 151
Elements 152
Delegating Events 152
Controller Events 153
Global Events 153
The Render Pattern 154
The Element Pattern 154
Building a Contacts Manager 156
Contact Model 157
Sidebar Controller 158
Contacts Controller 160
App Controller 163

12. The Backbone Library . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Models 165
Models and Attributes 166
Collections 167
Controlling a Collection’s Order 169
Views 169
Rendering Views 170
Delegating Events 170
Binding and Context 171
Controllers 172
Syncing with the Server 174
Populating Collections 175
On the Server Side 175
Custom Behavior 176
Building a To-Do List 178

13. The JavascriptMVC Library . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . 185
Setup 186
Classes 186
Instantiation 186
Calling Base Methods 187
Proxies 187
Static Inheritance 187
Introspection 188
A Model Example 188
Model 189
Attributes and Observables 189
Extending Models 191
Setters 191
Defaults 192
Helper Methods 192
Service Encapsulation 193
Type Conversion 196
CRUD Events 196
Using Client-Side Templates in the View 197
Basic Use 197
jQuery Modifiers 198
Loading from a Script Tag 198
$.View and Subtemplates 198
Deferreds 199
Packaging, Preloading, and Performance 199
$.Controller: The jQuery Plug-in Factory 200
Overview 202
Controller Instantiation 202
Event Binding 203
Templated Actions 204
Putting It All Together: An Abstract CRUD List 205

A. jQuery Primer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207

B. CSS Extensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217

C. CSS3 Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223

Index . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . 243

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About the Author

Alex MacCaw is a Ruby/JavaScript developer & entrepreneur. He has written a JavaScript framework, Spine and developed major applications including Taskforce and Socialmod, as well as a host of open source work. He speaks at Ruby/Rails conferences in NYC, SF and Berlin. In addition to programming he is currently traveling round the world with a Nikon D90 and surfboard.

JavaScript Web Applications Book Review