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

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20 CHAPTER 1 ■ INTRODUCING JQUERY Selecting Elements That Don’t Have the Attribute or Don’t Match the Attribute Value Inversely, to select elements that do not match an attribute-value pair, insert an exclamation point (!) before the equals sign between the attribute and value: [attribute!=value] Select all paragraphs without the class foo by running the following command: $("p[class!=foo]"); This results in the following: >>> $("p[class!=foo]"); [ p, p, p#bar ] Child Filters Child filters add an alternative to the use of :even, :odd, or :eq(). The main difference is that this set of filters starts indexing at 1 instead of 0 (like :eq() does). Selecting Even or Odd Parameters or Parameters by Index or Equation One of the more versatile filters, :nth-child() provides four different options to pass as a parameter when selecting elements: even, odd, index, or an equation. Like other child filters, this one starts indexing at 1 instead of 0, so the first element is at index 1, the second element at 2, and so on. Using :odd, the result set contained the paragraphs with a class of foo and an ID of foo; select odd paragraphs using :nth-child() to see the difference in how the filters handle by executing the following command: $("p:nth-child(odd)"); The results display as follows in the console: >>> $("p:nth-child(odd)"); [ p, p ] Though this output may seem strange, the mismatched results are a product of the difference in how the elements index. Selecting First or Last Child Elements While very similar to :first and :last, :first-child and :last-child differ in that the returned element set can contain more than one match. For instance, to find the last span that is a child of a paragraph element, you might use the following: $("p span:last");
which returns the following in the console: >>> $("p span:last"); [ span.foo ] CHAPTER 1 ■ INTRODUCING JQUERY However, if you needed to find every span that was the last child of a paragraph element, you would use :last-child instead: $("p span:last-child"); This uses each parent as a reference instead of the DOM as a whole, so the results are different: >>> $("p span:last-child"); [ span, span.foo ] Form Filters Forms are a huge part of web sites these days, and their major role inspired a set of filters specifically geared toward forms. Because your HTML example does not have any form elements in it, you’ll need to append the file with some new markup for the following examples. In index.html, add the following HTML between the last paragraph tag and the first script tag: Sign Up Form Name Password I'm on my computer I'm on a shared computer Keep me signed in on this computer 21
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
Page 29 and 30: Only one paragraph in our document
Page 31 and 32: $(".foo+p"); CHAPTER 1 ■ INTRODUC
Page 33 and 34: $("p:odd"); [ p.foo, p#bar ] Select
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Page 39: Selecting Only Enabled or Disabled
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C H A P T E R 3 ■ ■ ■ Object-
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$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 $_startDay; public function
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138 CHAPTER 4 ■ BUILD AN EVENTS C
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200 CHAPTER 6 ■ PASSWORD PROTECTI
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P A R T 3 ■ ■ ■ Combining jQu
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236 CHAPTER 7 ■ ENHANCING THE USE
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264 CHAPTER 8 ■ EDITING THE CALEN
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P A R T 4 ■ ■ ■ Advancing jQu
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312 CHAPTER 9 ■ PERFORMING FORM V
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C H A P T E R 10 ■ ■ ■ Extend
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$.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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