Chapter 3: XMLHttpRequest Object 101
PART I
Propriety and Emerging XHR Features
Given the intense interest in Ajax, the XMLHttpRequest object is starting to be exercised a
great deal more than it has been in the past. Admittedly, the object is missing useful features
and lacks some capabilities to deal with common problems with the network or received
content. Without a strong specification, the browser vendors are adding various innovations
to the object at a furious pace. It is pretty likely that this section will not cover all the
features that may have been added by the time you read this, but we cover those that are
currently implemented in shipping or prerelease browsers, and later in the chapter point
out what is likely to come.FIGURE 3-7 Internet Explorer XHR authentication communication trace