JavaScript & jQuery: The Missing Manual ... - Robert Guajardo

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Index 508 index examples. See online resources; tutorials exclamation point (!) NOT operator, 87–88 != inequality operator, 80–81 !== strict inequality operator, 80 Expression Web Designer, 11 external HTML files, loading into web page, 349–356 external JavaScript files, 27–29, 457–459 attaching to web pages, 27–29, 33–34 compressing, 465–466 location of, 29 multiple, order of, 29 path errors involving, 474–476 external links, opening in new window, 238– 240 F fadeIn() function, jQuery, 34, 187 fadeOut() function, jQuery, 147, 187 fadeTo() function, jQuery, 188, 414 fadeToggle() function, jQuery, 187 false value. See booleans FancyBox plug-in, 222–234 CSS sprites used by, 228 customizing, 226–231 downloading files for, 224–225 gallery page for, setting up, 223–225 opening a page within a page, 246–249 fancybox.png file, 228 FAQ (Frequently Asked Questions) tutorial, 180–184 fields in forms, 273. See also forms; specific fields changing value of, 267 checking status of, 262–263 clicking, 266–267 disabling, 269–271, 273–276 enabling, 269–271 focus on, 161, 264–265, 268–269, 273 getting value of, 261–262 hiding, 271–272, 276–278 leaving, 266 selecting, 259–261 setting value of, 261–262 showing, 271–272 tags for, 258–259 validating, 278–291 error messages for, 283–284, 288–291, 299–300 plug-in for, setting up, 280–281 on server, 289 tutorial for, 291–300 validation rules for, 281–283, 284–288 www.it-ebooks.info :file selector, 260 files, external. See external JavaScript files filters for selectors, 135–136, 260–261 find() function, jQuery, 365, 407, 413, 414–415 Firebug plug-in, 37, 141, 477–489 installing, 477–478 stepping through scripts with breakpoints, 485–489 tracking scripts, 479–480 tutorials for, 481–484, 489–496 viewing errors, 478–479 Firefox JavaScript console in, 35–37 plug-ins for. See Firebug plug-in; HTML Validator plug-in :first filter, 135 flags, boolean data type used for, 82 Flanagan, David (author) JavaScript: The Definitive Guide (O’Reilly), 498 Flash, 23 Flickr images from, adding to web page, 378–383 tutorials for, 383–387 floor() method, Match object, 449 focus event, 161, 264–265 focus for form fields, 161, 264–265, 268–269, 273 focus() function, jQuery, 265, 269, 273 focus() method, window object, 244 for loops, 97–98 Form plug-in, 388 forms, 257–268 events for, 161, 263–268 fields in checking status of, 262–263 clicking, 266–267 disabling, 269–271, 273–276 enabling, 269–271 focus on, 161, 264–265, 268–269, 273 getting values of, 261–262 hiding, 271–272, 276–278 leaving, 266 selecting, 259–261 setting values of, 261–262 showing, 271–272 tags for, 258–259 in HTML5, 22 resources for, 410 submitting, 161, 263–264 multiple times, preventing, 271 without reloading page, 343, 347–348, 365–370 tutorials for, 272–278
validating, 278–291 error messages for, 283–284, 288–291, 299–300 plug-in for, setting up, 280–281 on server, 289 tutorial for, 291–300 validation rules for, 281–283, 284–288 form tag, HTML, 257–259 forward slash (/) division operator, 50 in HTML tags, 6 /= divide and assign operator, 54 /*...*/ enclosing comments, 73 /.../ enclosing regular expressions, 431 // preceding comments, 73–74 Freeman, Elisabeth (author) Head First HTML with CSS and XHTML (O’Reilly), 4 Freeman, Eric (author) Head First HTML with CSS and XHTML (O’Reilly), 4 Frequently Asked Questions (FAQ) tutorial, 180–184 functions, built-in to JavaScript. See built-in functions functions, jQuery. See also specific functions anonymous, 148–149, 171–172 chaining, 137–138, 146 passing to events, 163–164 functions, user-defined in JavaScript, 100–108 calling, 101 creating, 100–101 libraries of. See libraries location of, 101 naming, 100 parameters for, 102–104 for random numbers, 450 returning a value from, 104–105 scope of variables in, 105–108 tutorials for, 101–102, 108–114 undefined errors involving, 476 G getDate() method, Date object, 451 getDay() method, Date object, 451, 452 getElementById() method, document object, 128 getElementsByTagName() method, document object, 128 getFullYear() method, Date object, 451 get() function, jQuery, 356–357, 358, 365–370 getHours() method, Date object, 451, 452–456 getJSON() function, jQuery, 371–376, 378, 381 getMinutes() method, Date object, 451, 452–456 getMonth() method, Date object, 451, 451–452 getSeconds() method, Date object, 451, 452–456 getTime() method, Date object, 451 global variables, 107–108 GoMap plug-in, 387–400 information windows, adding, 397 map location, setting, 390–391 markers in map, adding, 393–396 navigation controls, removing, 392 scale of marker for, adding, 392 setting, 391 tutorials for, 397–400 type of map setting, 391–392 switching between, 392–393 using, 388–389 Google Chrome. See Chrome Google Docs (web site), 2 Google Doctype (web site), 497 Google Maps (web site) adding to web page, 387–400 as example of JavaScript, 2, 23, 124 grammatical errors. See syntax errors graphics. See images greater than operator (>), 80 greater than or equal to operator (>=), 80 H h1 tag, HTML, 7 h2 tag, HTML, 7 :has filter, 135 Head First HTML with CSS and XHTML (O’Reilly), 4 Head First JavaScript (O’Reilly), 498 Head First PHP & MySQL (O’Reilly), 351 Head Rush Ajax (O’Reilly), 500 head tag, HTML, 6 height. See dimensions height() function, jQuery, 319–322 height property, windows, 242 Heilman, Chris (author) Show Love to the Object Literal (blog post), 500 :hidden filter, 136 :hidden selector, 260 hide() function, jQuery, 34, 187 hiding elements. See visibility of elements hover event, 171–172, 210–211 href attribute, links, 236 HTML5: The Missing Manual (O’Reilly), 5 html() function, jQuery, 138, 405–406, 419 www.it-ebooks.info index Index 509
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www.it-ebooks.info
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JavaScript & jQuery www.it-ebooks.i
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JavaScript & jQuery www.it-ebooks.i
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Table of Contents The Missing Credi
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Selecting Page Elements: The jQuery
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Chapter 9: Enhancing Web Forms . .
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Chapter 14: Going Further with Java
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The Missing Credits About the Autho
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• Facebook: The Missing Manual, T
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Introduction The Web was a pretty b
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Note: After Netscape introduced Jav
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Hey, I am the title of this web
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As mentioned on page 5, a web page
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• Declaration Block. The code fol
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Commercial Software Commercial webs
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way: You could build a house by cut
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• Operating-system basics. This b
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Safari ® Books Online Safari® Boo
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Part One: Getting Started with Java
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Writing Your First JavaScript Progr
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!=) and full of unfamiliar words (v
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JavaScript is called a scripting la
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the closing tag—this approach ma
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In addition, you can attach externa
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6. Click the Alert box’s OK butto
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Attaching an External JavaScript Fi
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Most web browsers are set up to sil
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• Unterminated string literal. A
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Accessing the Safari Error Console
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The Grammar of JavaScript Learning
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Programming languages usually categ
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is a Boolean value: Either the emai
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Table 2-1. Some words are reserved
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FREQUENTLY ASKED QUESTION Spaces, T
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each line of code that uses the pri
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That feature, known as automatic ty
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The same rules apply when concatena
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Tutorial: Asking for Information In
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4. Return to your text editor. Loca
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you put the list of items between o
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Because the index number of the las
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So if each time the visitor clicks
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2. Between the first set of tags,
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5. Return to your text editor and e
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The world of JavaScript is also fil
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It’s easy to forget how a program
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The third line ends with a comment
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Adding Logic and Control to Your Pr
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Conditional Statement Basics Condit
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if (answer == 31) { alert('Correct.
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if (answer == 31) { alert('Correct.
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fridayCash >= 50 yes alert('You sho
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Note: To type a pipe character, pre
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crucial pieces of a conditional sta
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Note: Why two sets of script tags?
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Handling Repetitive Tasks with Loop
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The first time through this loop, t
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For Loops JavaScript offers another
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However, with a do/while loop, you
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ace, one or more lines of JavaScrip
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function print(message) { document.
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var formattedTotal = total.toFixed(
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var message = 'Outside the function
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the prompt() command. In addition,
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Now that the basic variables for th
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This code is just a basic if/else s
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Part Two: Getting Started with jQue
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Introducing jQuery The first chapte
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jQuery isn’t the only JavaScript
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2. Click the “Current Release”
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Tip: When using the Google CDN, you
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It may seem hard to believe, but, i
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• Remove the element. In the Netf
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Unfortunately, the major browsers h
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Element selectors jQuery also has i
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Advanced Selectors jQuery also lets
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jQuery Filters jQuery also provides
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Because looping through a collectio
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• .text() works like .html() but
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Note: jQuery also includes a functi
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• Finally, you may want to toggle
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highlight a tag (perhaps in reacti
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The attr() function returns the att
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Fifty alert dialog boxes with the m
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Creating all that HTML takes time a
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4. Click on the empty line between
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Although the text looks like it wil
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Action/Reaction: Making Pages Come
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Mouse Events Ever since Steve Jobs
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Form Events In the pre-JavaScript d
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2. Assign an event. In jQuery, most
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Tutorial: Introducing Events This t
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Now that you’ve got the basics, y
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More jQuery Event Concepts Because
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Tip: Because the ready() function i
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The toggle() Event jQuery’s toggl
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Tip: If you access the event object
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Advanced Event Management You can l
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Other Ways to Use the bind() Functi
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function is discussed on page 187).
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9 function() { 10 $(this).next('.an
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Animations and Effects In the last
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Basic Showing and Hiding jQuery pro
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Normally, when you hide an element
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The Programming 1. In a text editor
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edge of the page, changing its opac
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When using the animate() function,
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its width and height from zero to f
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Note: See the note on page 29 for i
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$(document).ready(function() { $('#
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You’ll see the div move into view
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Part Three: Building Web Page Featu
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Improving Your Images Web designers
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The key to this technique is line 1
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1 2 3 $(document).ready(function(
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Figure 7-2: The basic structure of
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Here’s the creative part: Instead
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Overview of Task The way the galler
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1. In a text editor, open the file
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New image (fade in) 1 2 3 Old i
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The Basics FancyBox is very easy to
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In addition, FancyBox can use the
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jQuery FancyBox accepts a lot of di
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and shifts the image using the back
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• Border color around pop-up imag
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The actual value you supply the rel
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Improving Navigation Links make the
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Line 1 selects all external links (
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Manually adding target=“_blank”
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open(URL, name, properties) The ope
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• toolbar sets the visibility of
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Tip: The jQuery ScrollTo plug-in pr
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1. Download the FancyBox files from
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5. Near the top of the file, click
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Gadgets Gadget Basic Gadget Stan
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margin: 0; padding: 0; list-style-t
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To activate the menu, you first use
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Enhancing Web Forms Since the earli
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Mars Alpha Centauri You've never he
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$(':checked') Even better, you can
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adio buttons and checkboxes require
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This code creates a text field on t
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Like other events, you can use jQue
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they can type? Why not just place t
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Sometimes I get the same form infor
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Note: See the note on page 29 for i
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To disable the fields, all you have
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fields if they don’t have to. You
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Checking to make sure a text field
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5. Apply the validate() function to
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For example, say you have a field a
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Tip: You can combine the basic vali
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$('#signup').validate({ rules: { na
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While JavaScript validation is grea
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label.error { color: #F00; font-wei
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Congratulations—you’ve just add
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equired: true, email: true } } // e
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Don’t forget the comma on line 5.
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to place. The function receives bot
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Expanding Your Interface A web page
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Overview Specifications Shipping T
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.tabs a { display: block; text-deco
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Tabbed Panels Tutorial Now
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Line 3 hides the panels. Because ea
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9. Save the page and try it out in
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Using AnythingSlider AnythingSlider
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This is a tag (an HTML tag meant
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• Color of the navigation buttons
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• Variable size slides. If each s
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• innerWidth() returns the width
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$('#caption').css({ 'position' : 'a
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.scrollTop( ) .scrollLeft( ) Browse
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Here’s the HTML for a basic toolt
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tooltip content. If the tooltip con
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8. Inside the anonymous function yo
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Lines 7 and 8 use the outerHeight()
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Note: The example in this section p
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13 if (triggerPos.top - tipH - scro
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Part Four: Ajax: Communication with
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Introducing Ajax JavaScript is grea
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• Display new HTML content withou
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The XMLHttpRequest object was actua
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1. Create an instance of the XMLHtt
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In addition, most of the time, you
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Unless you’re using jQuery’s ba
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fine—it’ll get any visitors to
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$('#newslinks a').click(function()
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Or: $.get(url, data, callback); $.p
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You need to be careful using this m
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When the web browser sends off a re
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link behavior and prevents the web
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Tutorial: Using the get() Function
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The tag has the ID login applied t
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doesn’t remove the first error me
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Note: Another type of JSON, known a
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The same is true with a JSON object
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You pass the JSON object, and an an
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Flickr and Google Maps In the previ
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Flickr gives you a couple of ways t
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Note: You can only search for tags
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(see line 2 on page 381). Then, to
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and an anonymous function. The $.ea
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11. Save the page and preview it in
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Note: GoMap uses version 3 of the G
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In fact, you can use anything that
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mapTypeControl : false If you do li
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You can also add a marker after the
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Adding Information Windows to Marke
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8. Edit the script by adding a comm
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Part Five: Tips, Tricks, and Troubl
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Getting the Most from jQuery jQuery
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Storing a selection into a variable
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$('#main a') than this selector: $(
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• Selectors (http://api.jquery.co
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• Internals (http://api.jquery.co
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jQuery functions working in this wa
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You use .find() to select a descend
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The .siblings() function also can t
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More Functions For Manipulating HTM
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This is the contents of outer
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$('#container').delegate('selector'
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Going Further with Java Script This
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In this case, the conditional state
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The slice() method requires a numbe
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Unless you’re a super-alien from
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Character Matches | Either the char
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string, when what you really want i
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Note: For regular expressions that
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Note: The email regex listed above
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• www\. matches www.. • ) is th
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You could rewrite the code from pag
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Working with Numbers Numbers are an
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Note: You’re probably wondering w
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var cost = 10; var printCost = '$'
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The new Date() command creates a Da
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JavaScript lets you access particul
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Line 8 introduces a mathematical op
Page 475 and 476: Creating a date that’s one week f
Page 477 and 478: For example, if you have a search b
Page 479 and 480: 14 ); 15 }); //end ready() Now, the
Page 481 and 482: Notice that there’s an awful lot
Page 483 and 484: eak; default: message = 'What kind
Page 485 and 486: Troubleshooting and Debugging Every
Page 487 and 488: You’ll encounter a syntax error w
Page 489 and 490: There are three basic categories of
Page 491 and 492: For example, the following code gen
Page 493 and 494: paths is the location of the web pa
Page 495 and 496: The best way to deal with errors an
Page 497 and 498: View console List of errors Using c
Page 499 and 500: Tutorial: Using the Firebug Console
Page 501 and 502: Save the page; reload it in Firefox
Page 503 and 504: More Powerful Debugging The Firebug
Page 505 and 506: After the script begins to run, as
Page 507 and 508: Add new expression chapter 15: trou
Page 509 and 510: 3. Launch your text editor and open
Page 511 and 512: A red dot appears to the left of li
Page 513 and 514: 16. Return to your text editor, and
Page 515 and 516: JavaScript Resources This book prov
Page 517 and 518: jQuery Much of this book covered th
Page 519 and 520: Websites • Eloquent JavaScript (h
Page 521 and 522: Index Symbols & (ampersand) && logi
Page 523 and 524: ind() function, jQuery, 177-179, 42
Page 525: dimensions of browser window, 319-3
Page 529 and 530: post() function, 356-357, 358 seria
Page 531 and 532: examples using, 2, 23, 124 librarie
Page 533 and 534: searching selections, 365, 407, 413
Page 535 and 536: typeof operator, 72 typing errors.
Page 537 and 538: Colophon This book was composited i
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