April 2007
Intermediate to advanced
1728 pages
47h 51m
English
Content preview from JavaScript® Bible, Sixth EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 13. JavaScript Essentials
IN THIS CHAPTER
JavaScript language versions
How to separate the language from the document object model
Where scripts go in your documents
Language highlights for experienced programmers
Whenever JavaScript is discussed in the context of the web browser environment, it is sometimes difficult to distinguish between JavaScript the scripting language and the objects that you use the language to control. Even so, it's important to separate the language from the object model just enough to help you make important design decisions when considering JavaScript-enhanced pages. You may come to appreciate the separation in the future if you use JavaScript for other object models, such as server-side programming or scripting Flash animations. All the basics of the language are identical. Only the objects differ.
This chapter elaborates on many of the fundamental subjects about the core JavaScript language raised throughout the tutorial (Part II), particularly as they relate to deploying scripts in a world in which visitors to your pages may use a wide variety of browsers. Along the way, you receive additional insights into the language itself. Fortunately, browser differences as they apply to JavaScript have lessened considerably as modern browsers continue to inch closer to consistently supporting the JavaScript (ECMAScript) standard. You can find details about the JavaScript core language syntax in Part IV.
JavaScript Versions
The JavaScript language has its own ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.