J Query Presentation

Introduction Why you’re going to love jQuery!

Introduction What we want to create? Dynamic Live Websites Effects filled Fast, responsive sites What do we have? Flash Java Javascript

The Solution : jQuery What is jQuery? jQuery is a fast and concise JavaScript Library that simplifies HTML document traversing, event handling, animating, and Ajax interactions for rapid web development. jQuery is designed to change the way that you write JavaScript.

History of jQuery Developed by John Resig Released v1.0 on November 26th, 2006 Maintained as an Open Source software (dual licensed under MIT and GNU GPL) Microsoft planning to integrate into Microsoft Visual Web Developer Nokia planning to integrate into Web Run-Time platform Currently on Version 1.4, released

Features of jQuery DOM element selections using the cross-browser open source selector engine Sizzle DOM traversal and modification Events CSS manipulation Effects and animations AJAX Extensibility through plugins Utilities - such as browser version and the each function.

A Few Examples Forms Chatboxes Menus Dropdowns Sliders Tabs Slideshows Games

Technical Implementation Because, after all, we are I.T. folks.

jQuery Object The jQuery Object Contains a reference to the DOM element Has properties of the DOM element, like text, html, tags Can be used to manipulate the DOM directly Can be nested Every jQuery Function Should return the same jQuery object

Using jQuery Download the .JS file (23KB otal, minified) Use the jQuery file hosted on Google’s Code servers <html> <head> <script type="text/javascript" src="jquery.js"> </script> <script type="text/javascript"> </script> </head> <body> <a href="http://jquery.com/">jQuery</a> </body> </html>

jQuery Syntax $(document).ready(function() { $("a").click(function(event) { alert("Thanks for visiting!"); }); });

The $ Symbol $ is the Shortcut for the jQuery Global Class Use it to access any part of the DOM Search by CSS to get the element. Returns a jQuery object which can be futher manipulated

DOM Traversing Document Object Model: The way of representing the Elements of a Document as Objects Way we represent HTML, XML, XHTML From BODY, P, DIV, SPAN, etc. Any element can be accessed from its DOM structure

Chainable Functions Chainable events: find this, do several things in succession $('#message2').fadeIn('slow').addClass('alert').html('Validate your markup!'); Allows us to create complex yet easy to understand chains of actions

jQuery Animations Animations Built in fadeIn() fadeOut() hide() show() slideDown() slideUp() toggle() slideToggle() fadeTo() animate() See also: Easing Plug-in jQuery User Interface: http://ui.jquery.com

When is the DOM Ready? When is DOM ready? We can use the ready() function to find out $(document).ready(function() { // Write Code Here });

CSS & Attribute Matching Search with Tags and CSS: $('p'); $('p.message'); $('#message .text'); $('ul#menu > li'); $('ul#menuul'); Attribute Matching: $('img[@alt]'); $('a[@href*=google]');

jQuery Events Don't add "onclick" to your markup: use jQuery to find and assign events $('#control').click(function() { $('#message').show().addClass('alert');}); $('#control').toggle(function() { $('#message').show().addClass('alert');}, function(){ $('#message').removeClass('alert').hide();});

jQuery with Other Frameworks Mootools Prototype, etc Other frameworks also use the $ shortcut Add code like this before making any jQuery calls: varfoo = jQuery.noConflict(); Then use it like this: foo('#message').show();

AHAH !?! AHAH style (Asynchronous HTML and HTTP) Easiest way of creating Asynchronous sites $('#control').click(function() { $('#message').load('current.php');});

AJAX with jQuery Asynchronous Javascript and XML AJAX - Processing the feed $('#demo5-1').click(function() { $('#headline-container').html(''); $.get('headlines.xml', function(rss){ $(rss).find('item title').each(function(index) { $('#headline-container').append('<p>' + $(this).text() + '</p>'); }); });});

Live Examples I can’t believe its not Flash!

Links Facebook Search: http://demos.9lessons.info/auto.htm Photoslider: http://css-tricks.com/examples/AnythingSlider/#panel-5 Tabbed Manu: http://www.queness.com/resources/html/tabmenu/jquery-tabbed-menu-queness.html Flip: http://lab.smashup.it/flip/ Gallery: http://visuallightbox.com/photo-gallery-with-lightbox-simple-html-demo.html Zoom image: http://www.hotajax.org/demo/jquery/zoomimage/zoomimage/index.html Mac Dock: http://nettuts.s3.cdn.plus.org/358_jquery/example%20files/all-examples.html Site with jQuery: http://pupunzi.com/#welcome.html 3d Sphere in jQuery: http://www.devirtuoso.com/Examples/3D-Engine/sphere.html Chat Noir: www.vishalkumar.in/works/jscat

Who’s using jQuery? Google Dell Bank of America Mozilla Drupal NetFlix NBC Digg

How can I learn and use jQuery Check out jQuery.com Documentation Sites like www.jquerytutorials.com Plugins for many of the features Apply it to any web based application Change the way you develop websites, and bring life to the online experience!

Closing Remarks Thank you for listening. If you have any queries, please feel free to ask . If you want to know how you can use a particular module of technology for your project or application, contact me at vishalkumar@gmail.com +91 9985 463 469

References jQuery: www.jQuery.com jQuery 1.4 Reference Guide(Jan 2010), Pack Publishing www.noupe.com www.jquerytutorials.com http://www.webdesignerwall.com/tutorials/jquery-tutorials-for-designers/ www.google.com/images (search “jquery <feature>”)

J Query Presentation

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