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JavaScript Patterns

JavaScript Patterns
作者:Stoyan Stefanov
出版社:O'Reilly Media, Inc.
出版年:2010-09
ISBN:9780596806750
行业:计算机
浏览数:39

内容简介

What's the best approach for developing an application with JavaScript? This book helps you answer that question with numerous JavaScript coding patterns and best practices. If you're an experienced developer looking to solve problems related to objects, functions, inheritance, and other language-specific categories, the abstractions and code templates in this guide are ideal -- whether you're writing a client-side, server-side, or desktop application with JavaScript. Written by JavaScript expert Stoyan Stefanov -- Senior Yahoo! Technical and architect of YSlow 2.0, the web page performance optimization tool -- JavaScript Patterns includes practical advice for implementing each pattern discussed, along with several hands-on examples. You'll also learn about anti-patterns: common programming approaches that cause more problems than they solve. Explore useful habits for writing high-quality JavaScript code, such as avoiding globals, using single var declarations, and more Learn why literal notation patterns are simpler alternatives to constructor functions Discover different ways to define a function in JavaScript Create objects that go beyond the basic patterns of using object literals and constructor functions Learn the options available for code reuse and inheritance in JavaScript Study sample JavaScript approaches to common design patterns such as Singleton, Factory, Decorator, and more Examine patterns that apply specifically to the client-side browser environment

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作者简介

Stoyan Stefanov is a Yahoo! web developer, book author (Object-Oriented JavaScript), book contributor (Even Faster Web Sites, High Performance JavaScript), and technical reviewer (JavaScript: The Good Parts, PHP Mashups). He speaks regularly about JavaScript, PHP, and other web development topics at conferences and on his blog (). Stoyan is the creator of the smush.it image optimization tool and architect of Yahoo's performance optimization tool YSlow 2.0.

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目录

Preface

1. Introduction

2. Essentials

3. Literals and Constructors

4. Functions

5. Object Creation Patterns

6. Code Reuse Patterns

7. Design Patterns

8. DOM and Browser Patterns

Index

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读书文摘

This book discusses the following types of patterns: • Design patterns • Coding patterns • Antipatterns

能否通过 delete 来删除变量: 通过 var 创建的全局变量(在函数体之外创建的变量)不能被删除 没有用 var 创建的隐式全局变量(不考虑函数内的情况)可以被删除 也就是说,隐式全局变量并不是真正的变量,而是全局对象的属性。属性可以通过 delete 删除的,但变量不能被删除。

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