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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Class 3 ~ Javascript ~ Girl Develop IT</title>
<meta name="description" content="This is the official Girl Develop It Core Intro Javascript course. Material based on original material by Sara Chipps, Pamela Fox, Alexis Goldstein, Izzy Johnston and Leo Newball.
The course is meant to be taught in 4 two-hour sections. Each of the slides and practice files are customizable according to the needs of a given class or audience.">
<meta name="author" content="Girl Develop It">
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
<link rel="stylesheet" href="reveal/css/reveal.css">
<link rel="stylesheet" href="reveal/css/theme/gdidefault.css" id="theme">
<!-- For syntax highlighting -->
<!-- light editor<link rel="stylesheet" href="lib/css/light.css">-->
<!-- dark editor--><link rel="stylesheet" href="reveal/lib/css/dark.css">
<!-- If use the PDF print sheet so students can print slides-->
<link rel="stylesheet" href="reveal/css/print/pdf.css" type="text/css" media="print">
<!--[if lt IE 9]>
<script src="lib/js/html5shiv.js"></script>
<![endif]-->
</head>
<body>
<div class="reveal">
<!-- Any section element inside of this container is displayed as a slide -->
<div class="slides">
<!-- Opening slide -->
<section>
<img src = "images/gdi_logo_badge.png">
<h3>Beginning Javascript</h3>
<h4>Class 3</h4>
</section>
<!-- Welcome-->
<section>
<h3>Welcome!</h3>
<div class = "left-align">
<p>Girl Develop It is here to provide affordable and accessible programs to learn software through mentorship and hands-on instruction.</p>
<p class ="green">Some "rules"</p>
<ul>
<li>We are here for you!</li>
<li>Every question is important</li>
<li>Help each other</li>
<li>Have fun</li>
</ul>
</div>
</section>
<!-- What is a library-->
<section>
<h3>What is a library?</h3>
<ul>
<li class = "fragment">Software libraries hold functions (not books!)</li>
<li class = "fragment">When you include a library, you can use all the functions in that library</li>
<li class = "fragment">That means: <span class = "pink">you get to take advantage of other people's experience!</li>
<li class = "fragment">And... <span class ="blue">Save time!</span></li>
</ul>
</section>
<!-- What is jQuery-->
<section>
<h3>What is jQuery?</h3>
<p class = "fragment">jQuery is a <span class = "green">library</span> of JavaScript functions.</p>
<p class = "fragment">It contains many functions to help simplify your programming, including:</p>
<ul>
<li class = "fragment">HTML element selection & manipulation</li>
<li class = "fragment">CSS manipulation</li>
<li class = "fragment">HTML events</li>
<li class = "fragment">JavaScript effects and animations</li>
</ul>
</section>
<section>
<h3>Why use jQuery?</h3>
<ul>
<li class = "fragment">The most popular JavaScript library</li>
<li class = "fragment">jQuery empowers you to "write less, do more."</li>
<li class = "fragment">Great <a href = "http://docs.jquery.com/" target = "_blank">documentation and tutorials</a></li>
<li class = "fragment">Used by nearly 20 million(!) websites</li>
</ul>
</section>
<section>
<h3>jQuery: A Brief History</h3>
<ul>
<li class = "fragment">jQuery was created by John Resig, a JavaScript tool developer at Mozilla.</li>
<li class = "fragment">January 2006: John announced jQuery at BarCampNYC: BarCampNYC Wrap-up</li>
<li class = "fragment">September 2007: A new user interface library is added to jQuery: jQuery UI: Interactions and Widgets</li>
<li class = "fragment">September 2008: Microsoft and Nokia announce their support for jQuery</li>
<li class = "fragment">December 2009: jQuery wins .Net Magazine's Award for Best Open Source Application</li>
</ul>
</section>
<!-- Including jquery-->
<section>
<h3>Including jQuery</h3>
Two ways to include jQuery on your page:
<div class = "fragment">
Download the library, store it locally:
<pre><code contenteditable class = "html">
<head>
<script type="text/javascript" src="jquery.js"></script>
</head>
</code></pre>
</div>
<div class = "fragment">
Include the the live library:
<pre><code contenteditable class = "html">
<head>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.8.3.min.js">
</script>
</head>
</code></pre>
</div>
<div class = "fragment">
Note: live code can change! It's always best to download
</div>
</section>
<!-- Selectors-->
<section>
<h3>jQuery Selectors</h3>
<p>Remember <span class = "green">document.getElementById()</span> and <span class = "green">documet.getElementsByTagName()</span>? </p>
<p class = "fragment"> jQuery selectors let you get elements by: </p>
<ul>
<li class = "fragment">Element name (div, p)
<pre><code contenteditable class = "javascript">
var divs = $("div"); // All divs on page
</code></pre>
</li>
<li class = "fragment">ID name (#mainpicture, #results)
<pre><code contenteditable class = "javascript">
var img = $("#mainpicture"); //img with id mainpicture
</code></pre>
</li>
<li class = "fragment">Class name (.result, .picture)
<pre><code contenteditable class = "javascript">
var images = $(".picture"); //All images with class picture
</code></pre>
</li>
</ul>
</section>
<!-- Actions-->
<section>
<h3>jQuery Actions</h3>
<div class = "left-align">
<p class = "fragment">jQuery has hundreds of actions that can be performed on any element</p>
<p class = "fragment">All the actions are methods</p>
<p class = "fragment">As methods they are called with dot notation</p>
</div>
<div class = "fragment">
Action format
<pre><code contenteditable class = "javascript">
$(selector).action();
</code></pre>
</div>
</section>
<!-- Attributes and css-->
<section>
<h3>Updating attributes and css</h3>
<div class = "fragment">
<pre><code contenteditable class = "html">
<img id="mainpicture" src="http://girldevelopit.com/assets/pink-logo.png">
</code></pre>
</div>
<div class = "fragment">
Attribute get and set
<pre><code contenteditable class = "javascript">
var img = $('#mainpicture');
img.attr('src');
img.attr('src', 'http://girldevelopit.com/assets/pink-logo.png');
</code></pre>
</div>
<div class = "fragment">
CSS property get and set
<pre><code contenteditable class = "javascript">
var img = $('#mainpicture');
img.css('width');
img.css('width', '200px');
</code></pre>
</div>
</section>
<!-- html values-->
<section>
<h3>Updating values and html</h3>
<div class = "fragment">
<pre><code contenteditable class = "html">
<div id = "results">Boo!</div>
</code></pre>
</div>
<div class = "fragment">
Get and set html value
<pre><code contenteditable class = "javascript">
var div = $('#results');
div.html();
div.html('New html!');
</code></pre>
</div>
</section>
<!-- Append and prepend-->
<section>
<h3>Append and Prepend</h3>
<div class = "fragment">
<pre><code contenteditable class = "html">
<div id = "results">Boo!</div>
</code></pre>
</div>
<div class = "fragment">
Append html
<pre><code contenteditable class = "javascript">
var div = $('#results');
div.append('Additional html');
</code></pre>
</div>
<div class = "fragment">
Prepend html
<pre><code contenteditable class = "javascript">
var div = $('#results');
div.prepend('Additional html (on top)');
</code></pre>
</div>
</section>
<section>
<h3>Creating new element</h3>
<div class = "fragment">
<pre><code contenteditable class = "javascript">
var newDiv = $('<div></div>');
</code></pre>
</div>
<div class = "fragment">
Seriously. That's it!
</div>
</section>
<!-- Exercise-->
<section>
<h3>Let's Develop It!</h3>
<p>Try to convert last week's DOM interaction into jQuery.</p>
<p>Don't forget to include jQuery in your html head!</p>
</section>
<!-- Document Ready-->
<section>
<h3>Document Ready</h3>
<div class = "left-align">
<p>Webpages take time to load</p>
<p class = "fragment">Almost always, you don't want the JavaScript to be called until the page is loaded</p>
</div>
<div class = "fragment">
Document ready is a method called when the page is loaded
<pre><code contenteditable class = "javascript">
$(document).ready(function(){
});
</code></pre>
</div>
<div class = "fragment left-align">
<span class = "yellow">Note:</span> The function() inside is an "anonymous function". It has no name, but still performs like a function.
</div>
</section>
<!-- HTML Events-->
<section>
<h3>HTML events</h3>
<p>Events occur on a webpage via user interaction</p>
<p class = "fragment">Common Events:</p>
<ul>
<li class = "fragment">mouseenter -- mouse goes inside an element</li>
<li class = "fragment">mouseleave -- mouse leaves an element</li>
<li class = "fragment">click -- mouse clicks an element</li>
<li class = "fragment"><a href = "http://api.jquery.com/category/events/" target = "_blank">Other events</a></li>
</ul>
</section>
<section>
<h3>Handling events</h3>
<pre><code contenteditable class = "javascript">
$(selector).mouseenter(function(){
//code when the mouse enters
})
</code></pre>
<div class = "fragment">
<pre><code contenteditable class = "javascript">
$('.box').mouseenter(function(){
$(this).css('background-color', 'purple')
})
</code></pre>
</div>
<div class = "fragment left-align">
<div>The <span class = "green">$(this)</span> selector in jQuery refers to the element on whom the action was called.</div>
<div>Here <span class = "green">$(this)</span> is the <span class = "blue">$('.box')</span> that the mouse entered.
</div>
</section>
<section>
<h3>Handling event examples</h3>
<div class = "fragment">
<pre><code contenteditable class = "javascript">
$('.box').mouseenter(function(){
$(this).css('background-color', 'purple')
})
</code></pre>
</div>
<div class = "fragment">
<pre><code contenteditable class = "javascript">
$('.box').mouseleave(function(){
$(this).css('background-color', 'orange')
})
</code></pre>
</div>
<div class = "fragment">
<pre><code contenteditable class = "javascript">
$('.box').click(function(){
$(this).css('background-color', 'green')
})
</code></pre>
</div>
</section>
<section>
<h3>Combining events</h3>
<p>If you want multiple events to happen on the same element, you should use the bind method</p>
<div class = "fragment">
<pre><code contenteditable class = "javascript">
$('.box').bind({
click: function() {
$(this).css('background-color', 'green')
},
mouseenter: function() {
$(this).css('background-color', 'purple')
},
mouseleave: function(){
$(this).css('background-color', 'orange')
}
});
</code></pre>
</div>
</section>
<!-- Exercise-->
<section>
<h3>Let's Develop It</h3>
<ul>
<li>Add a div to your html that is 100px by 200px</li>
<li>Bind events to the div in your javascript file</li>
<li>Don't forget to surround your events with document ready</li>
<li>Try to change size, color, or event the html inside the div</li>
<li>Bonus: change all the onclick events to jQuery click events</li>
</ul>
</section>
<!-- HTML forms-->
<section>
<h3>HTML forms</h3>
<p>HTML Forms allow users to enter information</p>
<div class = "fragment">
<pre><code contenteditable class = "html">
<form id ="about-me">
<input type = "text" id = "name" placeholder = "Enter a name"/>
<label>Do you like popcorn</label>
Yes <input type = "radio" name = "popcorn" val = "yes"/>
No <input type = "radio" name = "popcorn" val = "no"/>
<label>Favorite Dinosaur</label>
<select id = "dinosaur">
<option value = "t-rex">Tyrannosaurus Rex</option>
<option value = "tri">Triceratops</option>
<option value = "stego">Stegosaurus</option>
<option value = "other">Other</option>
</select>
<input type = "submit" value = "Go!" style = "padding: 7px; font-size:1em"/>
</form>
</code></pre>
</div>
</section>
<section>
<h3>HTML forms</h3>
<p>HTML Forms allow users to enter information</p>
<div class = "fragment left-align">
<form>
<input type = "text" id = "name" placeholder = "Enter a name" style = "width:300px; padding: 7px; font-size:1em"/><br/>
<label>Do you like popcorn</label><br/>
Yes <input type = "radio" name = "popcorn" val = "yes" style ="font-size:1em"/>
No <input type = "radio" name = "popcorn" val = "no" style ="font-size:1em"/><br/>
<label>Favorite Dinosaur</label><br/>
<select id = "dinosaur" style = "padding: 7px; font-size:1em">
<option>Tyrannosaurus Rex</option>
<option>Triceratops</option>
<option>Stegosaurus</option>
<option>Other</option>
</select><br/>
<input type = "submit" value = "Go!" style = "padding: 7px; font-size:1em"/>
</form>
</div>
</section>
<!-- JavaScript and HTML Forms-->
<section>
<h3>Values from Forms</h3>
<p>You can use JavaScript to get values from a form</p>
<div class = "fragment">
<pre><code contenteditable class = "javascript">
$('#name').val();
$('select#dinosaur').val();
$('input:radio[name=popcorn]:checked').val();
</code></pre>
</div>
<div class = "fragment">
Or set values of a form
<pre><code contenteditable class = "javascript">
$('#name').val('Mitch');
$('select#dinosaur').val('stego');
$('input:radio[name=popcorn]:checked').val('no');
</code></pre>
</div>
</section>
<section>
<h3>Values from Forms</h3>
<p>jQuery has an event for form submission</p>
<div class = "fragment">
<pre><code contenteditable class = "javascript">
$('#about-me').submit(function(event){
//code to execute after submission
return false;
});
</code></pre>
<span class = "yellow">"return false"</span> to prevent the form trying to submit to a server.
</div>
</section>
<!-- Exercise-->
<section>
<h3>Let's Develop It</h3>
<ul>
<li>Choose one (or all!) of your functions made so far</li>
<li>i.e. lifetime supply, favorite things, or my friends</li>
<li>Create a form to send dynamic data to the function when you click the button</li>
<li>Don't forget to add parameters to your existing functions!</p>
<li>This is a little harder than all the other exercises.</li>
<li>Be creative!</li>
</ul>
</section>
<!-- -->
<section>
<h2>Questions?</h2>
<div style = "font-size:1200%; height:100%; margin-top:40%" class ="blue">?
<div class ="clear"></div></div>
</section>
</div>
<footer>
<div class="copyright">
Javascript ~ Girl Develop It ~
<a rel="license" href="http://creativecommons.org/licenses/by-nc/3.0/deed.en_US"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-nc/3.0/80x15.png" /></a>
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