JavaScript: The Good Parts

Most programming languages contain good and bad parts, but JavaScript has more than its share of the bad, having been developed and released in a hurry before it could be refined. This authoritative book scrapes away these bad features to reveal a subset of JavaScript that’s more reliable, readable, and maintainable than the language as a whole-a subset you can use to create truly extensible and efficient code.

Considered the JavaScript expert by many people in the development community, author Douglas Crockford identifies the abundance of good ideas that make JavaScript an outstanding object-oriented programming language-ideas such as functions, loose typing, dynamic objects, and an expressive object literal notation. Unfortunately, these good ideas are mixed in with bad and downright awful ideas, like a programming model based on global variables.

When Java applets failed, JavaScript became the language of the Web by default, making its popularity almost completely independent of its qualities as a programming language. In JavaScript: The Good Parts, Crockford finally digs through the steaming pile of good intentions and blunders to give you a detailed look at all the genuinely elegant parts of JavaScript, including:

• Syntax
• Objects
• Functions
• Inheritance
• Arrays
• Regular expressions
• Methods
• Style
• Beautiful features

The real beauty? As you move ahead with the subset of JavaScript that this book presents, you’ll also sidestep the need to unlearn all the bad parts. Of course, if you want to find out more about the bad parts and how to use them badly, simply consult any other JavaScript book.

With JavaScript: The Good Parts, you’ll discover a beautiful, elegant, lightweight and highly expressive language that lets you create effective code, whether you’re managing object libraries or just trying to get Ajax to run fast. If you develop sites or applications for the Web, this book is an absolute must.

大多数编程语言都有好的部分和不好的部分，但JavaScript有更多的坏部分，在它被提炼之前匆忙地开发和发布了。这本权威的书去除了这些不好的功能，揭示了比整个语言更可靠、更可读性和更可维护的Java脚本子集–可以用来创建真正可扩展和高效的代码的子集。

考虑 the 作为开发社区中许多人的JavaScript专家，作者Douglas Crockford确认了使JavaScript成为一种杰出的面向对象编程语言的大量好想法-例如函数、松散类型、动态对象和富有表现力的对象文字表示法。不幸的是，这些好的想法与糟糕和糟糕的想法混在一起，比如基于全局变量的编程模型。

当Java小程序失败时，默认情况下，JavaScript成为Web语言，这使得它的受欢迎程度几乎完全独立于它作为编程语言的性质。在……里面 JavaScript：好的部分，Crockford终于深入挖掘了这一堆热气腾腾的善意和错误，让你详细地了解到JavaScript所有真正优雅的部分，包括：

• Syntax
• Objects
• 功能
• 继承
• Arrays
• Regular expressions
• Methods
• Style
• 美观的特征

真正的美人？当您继续学习本书介绍的JavaScript子集时，您还将避开以下需要 忘掉学习 所有不好的部分。当然，如果您想了解更多关于错误部分以及如何错误地使用它们的信息，只需查阅任何其他的Java书籍。

With JavaScript：好的部分，您将发现一种美丽、优雅、轻量级且具有高度表现力的语言，它使您能够创建有效的代码，无论您是在管理对象库，还是只是想让AJAX快速运行。如果你为Web开发站点或应用程序，这本书绝对是必备的。