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36 CHAPTER 2 ■ COMMON JQUERY ACTIONS AND METHODS .end() At times in jQuery scripts, you will find it necessary to back up to the last set of elements stored in the jQuery object. The .end() method does exactly that: it reverts the jQuery object to the state immediately preceding the last filtering action in the current jQuery object chain. To select all paragraphs, then find all spans, the original set of paragraphs is no longer available: >>> $("p").find("span"); [ span, span.foo ] To revert back to the set of paragraphs, add .end() to the chain: >>> $("p").find("span").end(); [ p, p.foo, p, p#bar ] Creating and Inserting DOM Elements The first thing you’ll learn that actually changes the DOM, rather than simply selecting elements from it, is how to create new elements and insert them into the DOM. Since the release of jQuery 1.4, this is pretty straightforward. This section of the book starts using more involved code snippets, and will therefore require a minor adjustment to your Firebug console. At the bottom right of the console, there is a round button with an arrow pointing upward (see Figure 2-1).
Figure 2-1. The button to activate the multiline console test area CHAPTER 2 ■ COMMON JQUERY ACTIONS AND METHODS Click this button to activate the multiline testing area, where you’ll be able to enter commands across multiple lines, making them easier to read and allowing for more advanced examples (see Figure 2-2). 37
Page 1: THE EXPERT’S VOICE ® IN OPEN SOU
Page 4 and 5: ii Pro PHP and jQuery Copyright ©
Page 6 and 7: iv Contents at a Glance ■About th
Page 8 and 9: vi ■ CONTENTS Understanding jQuer
Page 10 and 11: viii ■ CONTENTS Summary .........
Page 12 and 13: x ■ CONTENTS ■Chapter 9: Perfor
Page 14 and 15: xii About the Author ■ Jason Leng
Page 16 and 17: xiv Acknowledgments I feel like I s
Page 19 and 20: C H A P T E R 1 ■ ■ ■ Introdu
Page 21 and 22: CHAPTER 1 ■ INTRODUCING JQUERY Th
Page 23 and 24: SETTING UP A LOCAL TESTING ENVIRONM
Page 25 and 26: google.load("jquery", "1.4.2");
Page 27 and 28: Basic Selectors CHAPTER 1 ■ INTRO
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Page 33 and 34: $("p:odd"); [ p.foo, p#bar ] Select
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Page 37 and 38: which returns the following in the
Page 39: Selecting Only Enabled or Disabled
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C H A P T E R 3 ■ ■ ■ Object-
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$obj = new MyClass; var_dump($obj);
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CHAPTER 3 ■ OBJECT-ORIENTED PROGR
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$obj = new MyClass; // Get the valu
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} public function setProperty($newv
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} } return $this->getProperty(); pu
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Create a new object $newobj = new M
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} } // Create a new object $newobj
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Private Properties and Methods CHAP
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} public function __construct() { e
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*/ CHAPTER 3 ■ OBJECT-ORIENTED PR
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Ease of Implementation CHAPTER 3
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C H A P T E R 4 ■ ■ ■ Build a
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CHAPTER 4 ■ BUILD AN EVENTS CALEN
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# # DocumentRoot: The directory out
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CHAPTER 4 ■ BUILD AN EVENTS CALEN
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} ?> } } } CHAPTER 4 ■ BUILD AN E
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■ Note For the sake of brevity, D
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} ?> CHAPTER 4 ■ BUILD AN EVENTS
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} ?> } include_once $filename; CHAP
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private $_startDay; public function
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P A R T 3 ■ ■ ■ Combining jQu
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236 CHAPTER 7 ■ ENHANCING THE USE
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264 CHAPTER 8 ■ EDITING THE CALEN
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P A R T 4 ■ ■ ■ Advancing jQu
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312 CHAPTER 9 ■ PERFORMING FORM V
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C H A P T E R 10 ■ ■ ■ Extend
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$.validDate = function(date, option
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Modifying the Initialization Script
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Adding Methods to jQuery CHAPTER 10
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over, then returns it to its origin
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CHAPTER 10■ EXTENDING JQUERY ■
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Defines default values for the plug
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}); // Loads the event data from th
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■ ■ ■ Index ■ Special Chara
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■ C Calendar app JavaScript initi
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saving new calendar events in addin
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:eq( ) method, 17, 20, 26-27 equals
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eginning of string, 324 character c
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asic selectors in by class name, 12
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.die( ) method, 75-76 .error( ) met
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.parents( ) method, 33 .parentsUnti
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overview, 328 regex pattern to vali
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