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Get in the Habit of Using Context . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 Whose Children Are These?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 Using :nth-child Selector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 A Small Detail About Using :nth-child Selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 First and Last Children . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 Selecting by “empty” Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 Hidden or Visible. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 Even or Odd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 jQuery Events jQuery Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 Two ways of attaching an event handler to an event. . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 How to Unbind an Event . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 Using toggle() Events. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 What is Event Capture and Event Bubbling? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 Event Capture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 Event Bubbling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 List of All jQuery Events. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 Speeding Up jQuery The first rule of Javascript Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 The second rule of Javascript Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100 Choosing the Right Context. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100 Practical Lessons Practical jQuery Lessons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102 Lesson 1: The :not Selector.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102 Lesson 2: Storing Data Inside HTML Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106 Lesson 3: Callback Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108 Lesson 4: Using append and prepend methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108 Lesson 5: Using appendTo and prependTo methods . . . . . . . . . . . . . . . . . . . . . . . . . .109 Regular Expressions Regular Expressions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111 Using the RegExp object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113 Rules of the Pattern Parameter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114 Matching the Target String . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115 Regular Expression Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118 Final Note from the Author . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120 4
Thought transcends matter. When we looked inside an atom we found what we imagined would be there. We also found smaller particles inside molecules when we looked. We found exactly what we were looking for in the first place. When we looked outside into the universe and into the infinite vastness of space we found that it was expanding even faster. I hope you agree that according to these observations it seems that we often find that which we already believe to be there. The fact that you have purchased this book indicates that you believe you will learn something new. When I was writing it I believed the same thing. Greg Sidelnikov greg.sidelnikov@gmail.com 5
Page 1 and 2: “ Second Revision. July 2012 Unde
Page 3: Prototype, JavaScript Objects and J
Page 7 and 8: Preface The purpose of this book is
Page 9 and 10: A Lesson in Creativity The web deve
Page 11 and 12: I love jQuery because it allows me
Page 13 and 14: Improving Page Load Performance The
Page 15 and 16: Determining the Placement of Intern
Page 17 and 18: JavaScript 1. The only language peo
Page 19 and 20: What is JavaScript? Web designers u
Page 21 and 22: As you can see, variables can be as
Page 23 and 24: The example above will first execut
Page 25 and 26: Only variables and events should be
Page 27 and 28: Notice that variables a and b are c
Page 29 and 30: What Exactly is a JavaScript Variab
Page 31 and 32: A variable allocates enough data st
Page 33 and 34: Do you want to really understand pr
Page 35 and 36: What is a Variable? Variables can b
Page 37 and 38: In order to understand bitwise logi
Page 39 and 40: At first this might seem confusing.
Page 41 and 42: Let’s display the variable “a
Page 43 and 44: What’s important is the return va
Page 45 and 46: Inserting Form Values into MySQL Da
Page 47 and 48: I like code that you can “read”
Page 49 and 50: An object is created from a class.
Page 51 and 52: Dynamic Prototype-based Objects in
Page 53 and 54: Without knowing anything at all abo
Page 55 and 56:
More About JSON JSON is a data inte
Page 57 and 58:
In some programming languages the t
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JavaScript from scratch. If you are
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property access operator - the . (d
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Why does jQuery do exactly the same
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Learning jQuery The greatest thing
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If this sounds like you, then you w
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Web App Initialization To initializ
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In JavaScript, we can define variab
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As mentioned above, to an experienc
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Including jQuery In Your Source Cod
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Including jQuery as an External CDN
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Including jQuery UI In the Starting
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What Kind of Elements Can You Selec
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To traverse the DOM and make sure t
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Here is a basic inline CSS example
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Because the DIV element has ID of
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After selecting all of these input
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Figure 1 Mentality of a beginner jQ
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Whose Children Are These? If we are
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Next, let’s explore the possibili
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jQuery Events Because jQuery is so
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Of course, the effects of binding a
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Using toggle() Events Toggling betw
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Speed Up Your jQuery Code jQuery is
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Let’s now look at the jQuery way
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Practical jQuery Lessons Instead of
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There is a solution to this problem
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jQuery provides a secondary way of
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Lesson 3: Callback Functions All jQ
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For example, the following statemen
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As you may know an object can conta
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Notice that when we do it this way,
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Alternatively, we can create the pa
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if (“light”.match(/darkness/) =
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jQuery and Regular Expressions In p
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This is probably as simple as it ge
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The following example will demonstr
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Making Good CSS Buttons This tutori
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Sometimes it makes sense to make th
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1. Specify javascript: return false
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Our goal is to match the button wit
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So far, we have briefly discussed t
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Note from the Author Looks like you
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