Book Image

Learning jQuery - Fourth Edition - Fourth Edition

Book Image

Learning jQuery - Fourth Edition - Fourth Edition

Overview of this book

To build interesting, interactive sites, developers are turning to JavaScript libraries such as jQuery to automate common tasks and simplify complicated ones. Because many web developers have more experience with HTML and CSS than with JavaScript, the library's design lends itself to a quick start for designers with little programming experience. Experienced programmers will also be aided by its conceptual consistency. LearningjQuery - Fourth Edition is revised and updated version of jQuery. You will learn the basics of jQuery for adding interactions and animations to your pages. Even if previous attempts at writing JavaScript have left you baffled, this book will guide you past the pitfalls associated with AJAX, events, effects, and advanced JavaScript language features. Starting with an introduction to jQuery, you will first be shown how to write a functioning jQuery program in just three lines of code. Learn how to add impact to your actions through a set of simple visual effects and to create, copy, reassemble, and embellish content using jQuery's DOM modification methods. The book will take you through many detailed, real-world examples, and even equip you to extend the jQuery library itself with your own plug-ins.
Table of Contents (24 chapters)
Learning jQuery Fourth Edition
Credits
Foreword
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Miscellaneous properties and functions


These utility methods do not fit neatly into the previous categories, but are often very useful when writing scripts using jQuery.

Properties of the jQuery object

Property

Description

$.support

Returns an object containing properties indicating whether the browser supports various features and standards.

Arrays and objects

Function

Description

$.each(collection, callback)

Iterates over collection, executing callback for each item.

$.extend(target, addition, ...)

Modifies the object target by adding properties from the other supplied objects.

$.grep(array, callback, [invert])

Filters array by using callback as a test.

$.makeArray(object)

Converts object into an array.

$.map(array, callback)

Constructs a new array consisting of the result of callback being called on each item.

$.inArray(value, array)

Determines whether value is in array.

$.merge(array1, array2)

Combines the contents of array1 and array2.

$.unique(array)

Removes any duplicate DOM elements from array.

Object introspection

Function

Description

$.isArray(object)

Determines whether object is a true JavaScript array.

$.isEmptyObject(object)

Determines whether object is empty.

$.isFunction(object)

Determines whether object is a function.

$.isPlainObject(object)

Determines whether object was created as an object literal or with new Object.

$.isNumeric(object)

Determines whether object is a numeric scalar value.

$.isWindow(object)

Determines whether object represents a browser window.

$.isXMLDoc(object)

Determines whether object is an XML node.

$.type(object)

Gets the JavaScript class of object.

Other

Function

Description

$.trim(string)

Removes whitespace from the ends of string.

$.noConflict([removeAll])

Reverts $ to its pre-jQuery definition.

$.noop()

A function that does nothing.

$.now()

The current time in milliseconds since the epoch.

$.holdReady(hold)

Stops the ready event from being triggered, or releases this hold.