Chapter 17. A JavaScript Library for Ajax

In this lesson you will learn how to encapsulate some of the techniques studied up to now into a small JavaScript library that you can call from your applications.

An Ajax Library

Through the lessons and code examples up to now, we have developed a number of JavaScript code techniques for implementing the various parts of an Ajax application. Among these methods are:

  • A method for generating an instance of the XMLHTTPRequest object, which works across the range of currently popular browsers

  • Routines for building and sending GET and POST requests via the XMLHTTPRequest object

  • Techniques for avoiding unwanted caching of GET requests

  • A style of callback function that checks for correct completion of the XMLHTTPRequest ...

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