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

CHAPTER 2 ■ COMMON JQUERY ACTIONS AND METHODS
to another library using jQuery.noConflict() (which allows for multiple JavaScript libraries that use the
$ alias to be used on the same project without issue).
You can guarantee the $ alias will work using the following:
jQuery.ready(function($){
// All jQuery functionality here
$("p").fadeOut();
});
Technically, any alias can be passed here:
jQuery(document).ready(function(xTest){
xTest("#bar").click(function(){console.log("Clicked!");});
});
This performs as expected, with no errors. There aren’t many cases in which this check would be
necessary, but it illustrates how the alias works with the .ready() method.
Finally, the jQuery function itself can be used as an alias for .ready():
jQuery(function($){
// actions to perform after the DOM is ready
});
.unload()
The unload event is triggered whenever a user exits a page by clicking a link, reloading the page, using
the forward or back buttons, or closing the window entirely. However, the handling of unload is not
consistent across all browsers. And therefore should be tested in multiple browsers before being used in
production scripts.To create a link to Google and attach an alert to the unload event, use the following
code:
$("", {
"href":"http://google.com",
"text":"Go to Google!"
})
.appendTo("#bar");
$(window).unload(function(){
alert("Bye! Google something neat!");
});
Execute this code, and click the new link. The alert fires, and you’re redirected to the Google home
page.
Handling Event Attachment
There are a whole slew of browser events triggered by the user, and jQuery provides several methods to
handle them easily.
73