AJAX - The Complete Reference
With the basic concepts out of the way, like any good programming book we now jump right into coding with the ubiquitous “Hello World” example. In this version of the classic example, we will press a button and trigger an asynchronous communication request using an XMLHttpRequest (XHR) object and the Web server will issue an XML response which will be parsed and displayed in the page. The whole process is overviewed in Figure 1-4.
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