Pro PHP and jQuery by Jason Lengstorf.pdf - Computer Science ...

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CHAPTER 2 ■ COMMON JQUERY ACTIONS AND METHODS
As an example, the following will bind a handler to the click event, and fire the event.
$("#bar").click(function(){ console.log("Clicked!"); }).click();
Using AJAX Controls
The last set of jQuery methods we’re going to cover are probably the most useful, and more than likely
played a large role in the widespread adoption of jQuery. The methods providing AJAX 4 functionality are
incredibly useful and, especially for anyone who has built AJAX scripts in plain JavaScript before, as easy
as pie.
■ Note For further reading on AJAX, see the Wikipedia article here:
http://en.wikipedia.org/wiki/AJAX_%programming %29
For this section, you'll need an external file to access using the AJAX controls. Create a new file in the
testing folder called ajax.php. Inside, insert the following code:
This file will be called by the various AJAX methods available in jQuery. It will show you the data
passed to the script for illustrative purposes.
$.ajax()
The low-level, or most basic, function for sending AJAX requests is $.ajax(). Notice that this function is
called without a selector, because it doesn’t apply to the jQuery object. AJAX actions are global functions,
carried out independently of the DOM.
The $.ajax() function accepts one argument: an object containing settings for the AJAX call. If
called without any settings, the method will load the current page and do nothing with the result.
4 http://en.wikipedia.org/wiki/Ajax_%28programming%29