CHAPTER 14
Ajax
Asynchronous JavaScript and XML, or Ajax, is a methodology for exchanging data with the server in the background, without having to do a full page refresh. This allows elements of a page to be updated based on user events, without disrupting what the user is doing on the page, thereby enabling the development of highly responsive web applications.
Exchanging Data
An Ajax request is made using the XMLHttpRequest object. The first step to making a request is to create an instance of this object.
var myRequest = new XMLHttpRequest();
To handle the server’s response, an event handler is attached to the onload event of this object. ...
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