GDI-Intro-to-JavaScript/class3.html at master · lvecchio/GDI-Intro-to-JavaScript · GitHub

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<!doctype html>

<head>

<title>Class 3 ~ Javascript ~ Girl Develop IT</title>

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.">

<link rel="stylesheet" href="reveal/lib/css/dark.css">

<!--[if lt IE 9]>

<![endif]-->

</head>

<body>

<h3>Beginning Javascript</h3>

<h4>Class 3</h4>

</section>

<h3>Welcome!</h3>

<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>Every question is important</li>

<li>Help each other</li>

</ul>

</div>

</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>

</ul>

</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>

<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>

<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>

<h3>Including jQuery</h3>

Two ways to include jQuery on your page:

Download the library, store it locally:

<head>

</head>

</code></pre>

</div>

Include the the live library:

<head>

</script>

</head>

</code></pre>

</div>

Note: live code can change! It's always best to download

</div>

</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)

var divs = $("div"); // All divs on page

</code></pre>

</li>

<li class = "fragment">ID name (#mainpicture, #results)

var img = $("#mainpicture"); //img with id mainpicture

</code></pre>

</li>

<li class = "fragment">Class name (.result, .picture)

var images = $(".picture"); //All images with class picture

</code></pre>

</li>

</ul>

</section>

<h3>jQuery Actions</h3>

<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>

Action format

$(selector).action();

</code></pre>

</div>

</section>

<h3>Updating attributes and css</h3>

</code></pre>

</div>

Attribute get and set

var img = $('#mainpicture');

img.attr('src');

img.attr('src', 'http://girldevelopit.com/assets/pink-logo.png');

</code></pre>

</div>

CSS property get and set

var img = $('#mainpicture');

img.css('width');

img.css('width', '200px');

</code></pre>

</div>

</section>

<h3>Updating values and html</h3>

</code></pre>

</div>

Get and set html value

var div = $('#results');

div.html();

div.html('New html!');

</code></pre>

</div>

</section>

<h3>Append and Prepend</h3>

</code></pre>

</div>

Append html

var div = $('#results');

div.append('Additional html');

</code></pre>

</div>

Prepend html

var div = $('#results');

div.prepend('Additional html (on top)');

</code></pre>

</div>

</section>

<h3>Creating new element</h3>

var newDiv = $('<div></div>');

</code></pre>

</div>

Seriously. That's it!

</div>

</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>

<h3>Document Ready</h3>

<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>

Document ready is a method called when the page is loaded

$(document).ready(function(){

});

</code></pre>

</div>

<span class = "yellow">Note:</span> The function() inside is an "anonymous function". It has no name, but still performs like a function.

</div>

</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>

<h3>Handling events</h3>

$(selector).mouseenter(function(){

//code when the mouse enters

})

</code></pre>

$('.box').mouseenter(function(){

$(this).css('background-color', 'purple')

})

</code></pre>

</div>

<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>

<h3>Handling event examples</h3>

$('.box').mouseenter(function(){

$(this).css('background-color', 'purple')

})

</code></pre>

</div>

$('.box').mouseleave(function(){

$(this).css('background-color', 'orange')

})

</code></pre>

</div>

$('.box').click(function(){

$(this).css('background-color', 'green')

})

</code></pre>

</div>

</section>

<h3>Combining events</h3>

<p>If you want multiple events to happen on the same element, you should use the bind method</p>

$('.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>

<h3>Let's Develop It</h3>

<ul>

<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>

<h3>HTML forms</h3>

<p>HTML Forms allow users to enter information</p>

<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>

<option value = "t-rex">Tyrannosaurus Rex</option>

<option value = "tri">Triceratops</option>

<option value = "stego">Stegosaurus</option>

<option value = "other">Other</option>

</select>

</form>

</code></pre>

</div>

</section>

<h3>HTML forms</h3>

<p>HTML Forms allow users to enter information</p>

<form>

<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/>

<option>Tyrannosaurus Rex</option>

<option>Triceratops</option>

<option>Stegosaurus</option>

<option>Other</option>

</select><br/>

</form>

</div>

</section>

<h3>Values from Forms</h3>

<p>You can use JavaScript to get values from a form</p>

$('#name').val();

$('select#dinosaur').val();

$('input:radio[name=popcorn]:checked').val();

</code></pre>

</div>

Or set values of a form

$('#name').val('Mitch');

$('select#dinosaur').val('stego');

$('input:radio[name=popcorn]:checked').val('no');

</code></pre>

</div>

</section>

<h3>Values from Forms</h3>

<p>jQuery has an event for form submission</p>

$('#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>

<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>

<h2>Questions?</h2>

<div style = "font-size:1200%; height:100%; margin-top:40%" class ="blue">?

</section>

</div>

Javascript ~ Girl Develop It ~

</div>

</footer>

</div>

// Full list of configuration options available here:

// https://github.com/hakimel/reveal.js#configuration

Reveal.initialize({

controls: true,

progress: true,

history: true,

theme: Reveal.getQueryHash().theme, // available themes are in /css/theme

transition: Reveal.getQueryHash().transition || 'default', // default/cube/page/concave/zoom/linear/none

// Optional libraries used to extend on reveal.js

dependencies: [

{ src: 'reveal/lib/js/classList.js', condition: function() { return !document.body.classList; } },

{ src: 'reveal/plugin/markdown/showdown.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },

{ src: 'reveal/plugin/markdown/markdown.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },

{ src: 'reveal/plugin/highlight/highlight.js', async: true, callback: function() { hljs.initHighlightingOnLoad(); } },

{ src: 'reveal/plugin/zoom-js/zoom.js', async: true, condition: function() { return !!document.body.classList; } },

{ src: 'reveal/plugin/notes/notes.js', async: true, condition: function() { return !!document.body.classList; } }

]

});

</script>

</body>

</html>

GDI-Intro-to-JavaScript/class3.html at master · lvecchio/GDI-Intro-to-JavaScript · GitHub

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