javascript

Introduction
Chapter 16, ECMAScript for XML — Discusses the ECMAScript for XML (E4X) extension to
JavaScript, which is designed to simplify working with XML. This chapter explains the advantages of
E4X over using the DOM for XML manipulation.
Chapter 17, Ajax and JSON — Looks at common Ajax techniques, including the use of the
XMLHttpRequest object and Internet Explorer ’ s XDomainRequest object for cross - domain Ajax. This
chapter explains the differences in browser implementations and support as well as recommendations
for usage.
Chapter 18, Advanced Techniques — Dives into some of the more complex JavaScript patterns,
including function currying, partial function application, and dynamic functions. This chapter also
covers creating a custom event framework to enable simple event support for custom objects.
Chapter 19, Client - Side Storage — Discusses the various techniques for storing data on the client
machine. This chapter begins with a discussion of the most commonly supported feature, cookies, and
then discusses newer functionality such as DOM storage.
Chapter 20, Best Practices — Explores approaches to working with JavaScript in an enterprise
environment. Techniques for better maintainability are discussed, including coding techniques,
formatting, and general programming practices. Execution performance is discussed and several
techniques for speed optimization are introduced. Last, deployment issues are discussed, including
how to create a build process.
Chapter 21, Upcoming APIs — Introduces APIs being created to augment JavaScript in the browser.
Even though these APIs aren ’ t yet complete or fully implemented, they are on the horizon and
browsers have already begun partially implementing their features. This chapter includes discussions
on the Selectors API and HTML 5.
Chapter 22, The Evolution of JavaScript — Looks into the future of JavaScript to see where the
language is headed. ECMAScript 3.1, ECMAScript 4, and ECMAScript Harmony are discussed.
Conventions
To help you get the most from the text and keep track of what ’ s happening, a number of conventions are
used throughout this book.
Boxes like this one hold important, not - to - be forgotten information that is directly
relevant to the surrounding text.
Notes, tips, hints, tricks, and asides to the current discussion are offset and placed in italics like this.
As for styles in the text:
❑
❑
❑
N ew terms and important words are italicized when they’re introduced.
K eyboard combinations are shown like this: Ctrl+A.
F ile names, URLs, and code within the text look like this: persistence.properties .
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