• Fix Cross Browser Problems• Solve CSS Shortcomings• Do Things CSS Can’t Do

• Solve ‘Real World’ Problems• Get Your Site into an Environment with a Bright Future

Using jQueryto Extend CSS

• What about MooTools? Prototype? (go for it!)

Why jQuery?

Transparency

.transparent_class {

/* IE 8 */-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=50)";

/* IE 5-7 */filter: alpha(opacity=50);

/* Netscape */-moz-opacity: 0.5;

/* Safari 1.x */-khtml-opacity: 0.5;

/* Good browsers */opacity: 0.5;

}

With CSS:

• Messy• Invalid

With jQuery:

• Clean• Valid

Transparency$(“.transparent_class”).css(“opacity”, “0.5”);

Hover

• Not supported in IE <= 6• Limited...

With CSS:div {

background: white;}

div:hover {background: #eee;

}

With jQuery

• All Browser Support• More Options

$(“div”).hover(function(){ $(this).addClass(“hover”);}, function(){ $(this).removeClass(“hover”);});

$(“div”).hover(function(){ $(this).addClass(“hover bookHighlight”);}, function(){ $(this).removeClass(“hover bookHighlight”);});

Hover

• Not supported in IE <= 6

<ul> <li><a href=”#”>List Item One</a></li> <li><a href=”#”>List Item Two</a></li> <li><a href=”#”>List Item Three</a></li></ul>

CSSinput[type=text] { width: 250px; border: 1px solid #ccc; padding: 3px;}

input[type=radio] { vertical-align: middle;}

ul li { border-bottom: 1px solid #ccc;}

ul li:last-child { border-bottom: 0;}

<input type=”text” ... /><input type=”radio” ... /><input type=”submit” ... /><input type=”checkbox” ... /><input type=”password” ... />

HTML

Attribute & Psuedo Selectors

With jQuery

(Still handle styling with CSS)

Attribute & Psuedo Selectors

$(“input[type=text]”).addClass(“textInput”);

$(“ul li:last-child”).addClass(“last”);

$(“input[type=text]”) .focus(function(){

$(this).parent().addClass(“formFocus”); }) .blur(function(){

$(this).parent().removeClass(“formFocus”); });

<form> <div> <label>Name</label> <input type=”text” /> </div> <div> <label>Email</label> <input type=”text” /> </div> ...

Div has a hover state

...with opacity change

...and is a link.

Grids are hard

...and especially with variable height content

Need right margin Doesn’t need right margin

...when not tabular data.

Looks Simple?

Looks Simple?

<div class="book"> <h3>Book Title</h3> <p>Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas.</p> <a href="http://google.com">Learn More</a></div>

HTML

.book { width: 120px; float: left; padding: 10px; border: 1px solid #ccc; margin: 0 10px 10px 0; }

CSS

$(function() {

$(".book:nth-child(4n+1)").css("margin-right","0px");

$(".book a").hide();

var maxHeight = 0; $(".book").each(function(){ if ($(this).height() > maxHeight) { maxHeight = $(this).height(); } $(this).css("opacity", "0.7"); }); $(".book").height(maxHeight);

$(".book").hover(function(){ $(this) .addClass("hover") .css("opacity", "1.0"); }, function(){ $(this) .removeClass("hover") .css("opacity", "0.7"); });

$(".book").click(function(){ window.location = $(this).find("a").attr("href"); });

});

Looks Simple?

$(function() {

$(".book:nth-child(4n+1)").css("margin-right","0px"); $(".book a").hide(); var maxHeight = 0; var books = $(".book"); books .each(function() { if ($(this).height() > maxHeight) { maxHeight = $(this).height(); } $(this).css("opacity", "0.7"); }) .height(maxHeight) .hover(function() { $(this) .addClass("hover") .css("opacity", "1.0"); }, function() { $(this) .removeClass("hover") .css("opacity", "0.7"); }) .click(function() { window.location = $(this).find("a").attr("href"); });});

Looks Simple?

• Zebra Striping• Row / Column Highlighting

Table Tricks

Table Tricks$(function() { $("tr:odd").addClass("odd"); var i = 0; $("colgroup").each(function() { i++; $(this).attr("id", "col"+i); }); var totalCols = i; i = 1; $("td")

.each(function() { $(this).attr("rel", "col"+i); i++; if (i > totalCols) { i = 1; } })

.hover(function() { $(this).parent().addClass("hover"); var curCol = $(this).attr("rel"); $("#"+curCol).addClass("hover"); }, function() { $(this).parent().removeClass("hover"); var curCol = $(this).attr("rel"); $("#"+curCol).removeClass("hover"); });

});

$(function() { $("tr:contains('Hood')").addClass("found");

});

Table Tricks

Plugins!Tablesorter 2.0 by Christian Bachhttp://tablesorter.com/docs/

Table Tricks

• It’s cool... but it’s flair.• It’s (nearly) useless without JS.

Animation is Easy

$(function() {

$("#page-wrap").append('<img src="/images/expando-tab.png" alt="" id="expando-tab" />'); $('#expando').load('/expando.html'); $("#expando-tab").click(function(){ $("#expando").slideToggle(); }); });

Animation is Easy

<pre><code> ... code in here...</code></pre>

Regular State (overflow: hidden;)

Expanded State

pre { overflow: hidden; width: 563px; }

code { font-family: Courier, Monospace;}

var baseWidth = $("pre")[0].width(), rightPadding = 10;

$("pre").hover(function() { var codeInnerWidth = $("code", this).width() + rightPadding; if (codeInnerWidth > baseWidth) { $(this) .stop() .css({ zIndex: "100", position: "relative" }) .animate({ width: codeInnerWidth + "px" }); } }, function() { $(this).stop().animate({ width: baseWidth }); });

Animation is Easy

Loading after Loading

Big ass movieStarts loading right away, slows down page.

BonusIf users don’t have JavaScript, the movie isn’t going to play correctly anyway. So nothing is shown.

$(window).bind(“load”, function() { $('#movie-area').load('/movie.html');

});

Controlling Outside Content

Design is one thing...Content is another. CSS wasable to control the new graphics, but the change in text was done with jQuery.

Controlling Outside Content

$(function() { $('#coupon-link').text('Enter Voucher Code');

$('#coupon-input').css('display', 'inline');

});

MMMmmm PluginsFaceboxhttp://famspam.com/facebox

Tablesorterhttp://tablesorter.com/

Coda Sliderhttp://www.ndoherty.com/demos/coda-slider/1.1.1/

markItUp!http://markitup.jaysalvat.com/home/

jQuery UIhttp://jqueryui.com/

Interactions• Draggable• Droppable• Resizable• Selectable• Sortable

Widgets• Accordion• Datepicker• Dialog• Progressbar• Slider• Tabs

Effects• Show/Hide Methods• Toggle Class• Color Animation

Jan. 14 2006 – jQuery AnnouncedAug. 26 2006 - jQuery 1.0Jan. 14 2007 - jQuery 1.1Sep. 10 2007 - jQuery 1.2May 24 2008 - jQuery 1.2.6Feb. 20 2009 - jQuery 1.3.2

jQuery

Released UsableVersions

Dec. 17 1996 - CSS 1May 12 1998 - CSS 2

Jul. 19 2007 - CSS 2.1

Apr. 23 2009 - CSS 2.1

??? - CSS 3

CSS

Recommendations

The FUTURE

The FUTURE• Huge community of people USING it.

• Huge community of DEVELOPERS.

• Loads of DOCUMENTATION.

• Plenty of SUPPORT available.

• Gosh darn it, people like it!