Chapter 1

AJAX Essentials

In This Chapter

arrow Understanding AJAX

arrow Using JavaScript to manage HTTP requests

arrow Creating an XMLHttpRequest object

arrow Building a synchronous AJAX request

arrow Retrieving data from an AJAX request

arrow Managing asynchronous AJAX requests

If you've been following web trends, you've no doubt heard of AJAX. This technology has generated a lot of interest. In this chapter, I show you what AJAX really is, how to use it, and how to use a particular AJAX library to supercharge your web pages.

The first thing is to figure out exactly what AJAX is and what it isn't. It isn't

  • A programming language: It isn't one more language to learn along with the many others you encounter.
  • New: Most of the technology used in AJAX isn't really all that new; it's the way the technology is being used that's different.
  • Remarkably different: For the most part, AJAX is about the same things you'll see ...

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