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An introduction to

An introduction to. jQuery feels like cheating. jQuery is a fast and concise JavaScript library that simplifies HTML document traversing, event handling, animation, and Ajax interactions for rapid web development. About 29KB in size Minified and Gzipped.

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An introduction to

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  1. An introduction to

  2. jQuery feels like cheating.

  3. jQuery is a fast and concise JavaScript library that simplifies HTML document traversing, event handling, animation, and Ajax interactions for rapid web development.

  4. About 29KB in size Minified and Gzipped

  5. (function(){var l=this,g,y=l.jQuery,p=l.$,o=l.jQuery=l.$=function(E,F){return new o.fn.init(E,F)}, D=/^[^<]*(<(.|\s)+>)[^>]*$|^#([\w-]+)$/,f=/^.[^:#\[\.,]*$/;o.fn=o.prototype={init:function(E,H) {E=E||document;if(E.nodeType){this[0]=E;this.length=1;this.context=E;return this}if(typeof E==="string") {var G=D.exec(E);if(G&&(G[1]||!H)){if(G[1]){E=o.clean([G[1]],H)}else{var I=document.getElementById(G[3]); if(I&&I.id!=G[3]){return o().find(E)}var F=o(I||[]);F.context=document;F.selector=E;return F}}else {return o(H).find(E)}}else{if(o.isFunction(E)){return o(document).ready(E)}} if(E.selector&&E.context){this.selector=E.selector;this.context=E.context}return this.setArray(o.isArray(E)?E:o. makeArray(E))},selector:"",jquery:"1.3.2",size:function(){return this.length},get:function(E){return E===g?Array.prototype.slice.call(this):this[E]},pushStack:function(F,H,E){var G=o(F);G.prevObject=this;G.context= this.context;if(H==="find"){G.selector=this.selector+(this.selector?" ":"")+E}else{if(H){G.selector=this.selector+". "+H+"("+E+")"}}return G},setArray:function(E){this.length=0;Array.prototype.push.apply(this,E);return this},each:function (F,E){return o.each(this,F,E)},index:function(E){return o.inArray(E&&E.jquery?E[0]:E,this)},attr:function(F,H,G){var E=F;if(typeof F==="string"){if(H===g){return this[0]&&o[G||"attr"](this[0],F)}else{E={};E[F]=H}}return this.each(function(I){for(F in E){o.attr(G?this.style:this,F,o.prop(this,E[F],G,I,F))}})},css:function(E,F){if((E=="width"||E=="height")&&parseFloat(F)<0){F=g}return this.attr(E,F,"curCSS")},text:function(F){if(typeof F!=="object"&&F!=null){return this.empty().append((this[0]&&this[0].ownerDocument||document).createTextNode(F))}var E="";o.each(F||this,function(){o.each(this.childNodes,function(){if(this.nodeType!=8){E+=this.nodeType!=1?this.nodeValue:o.fn.text([this])}})});return E},wrapAll:function(E){if(this[0]){var F=o(E,this[0].ownerDocument).clone();if(this[0].parentNode) {F.insertBefore(this[0])}F.map(function(){var G=this;while(G.firstChild){G=G.firstChild}return G}).append(this)} return this},wrapInner:function(E){return this.each(function(){o(this).contents().wrapAll(E)})} ,wrap:function(E){return this.each(function(){o(this).wrapAll(E)})},append:function(){ return this.domManip(arguments,true,function(E){if(this.nodeType==1){this.appendChild(E)}})},prepend:function() {return this.domManip(arguments,true,function(E){if(this.nodeType==1){this.insertBefore(E,this.firstChild)}})}, before:function(){return this.domManip(arguments,false,function(E){this.parentNode.insertBefore(E,this)})}, after:function(){return this.domManip(arguments,false,function(E){this.parentNode.insertBefore(E,this.nextSibling)})}, end:function(){return this.prevObject||o([])},push:[].push,sort:[].sort,splice:[].splice,find:function(E){if(this.length===1) {var F=this.pushStack([],"find",E);F.length=0;o.find(E,this[0],F);return F}else{return this.pushStack (o.unique(o.map(this,function(G){return o.find(E,G)})),"find",E)}},clone:function(G){var E=this.map(function() {if(!o.support.noCloneEvent&&!o.isXMLDoc(this)){var I=this.outerHTML;if(!I){var J=this.ownerDocument.createElement("div"); J.appendChild(this.cloneNode(true));I=J.innerHTML}return o.clean([I.replace(/ jQuery\d+="(?:\d+|null)"/g,""). replace(/^\s*/,"")])[0]}else{return this.cloneNode(true)}});if(G===true){var H=this.find("*").andSelf(),F=0;E.find ("*").andSelf().each(function(){if(this.nodeName!==H[F].nodeName){return}var I

  6. About 27KB in size Minified and Gzipped Supports CSS 1-3 selectors

  7. About 29KB in size Minified and Gzipped Supports CSS 1-3 selectors IE 6.0+, FF 2+, Safari 3.0+, Opera 9.0+, Chrome

  8. About 29KB in size Minified and Gzipped Supports CSS 1-3 selectors IE 6.0+, FF 2+, Safari 3.0+, Opera 9.0+, Chrome There’s a big community developing plug-ins

  9. About 29KB in size Minified and Gzipped Supports CSS 1-3 selectors IE 6.0+, FF 2+, Safari 3.0+, Opera 9.0+, Chrome There’s a big community developing plug-ins Animation effects, table sorting, drag-and-drop, form validation, AJAX

  10. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Getting Stared</title> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript“> $(document).ready(function(){ $("a").click(function(event){ alert("Thanks for visiting!"); }); }); </script> </head> <body> <a href="http://wordpress.org/">WordPress</a> </body> </html>

  11. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Getting Stared</title> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript“> $(document).ready(function(){ $("a").click(function(event){ alert("Thanks for visiting!"); }); }); </script> </head> <body> <a href="http://wordpress.org/">WordPress</a> </body> </html>

  12. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Getting Stared</title> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript“> $(document).ready(function(){ $("a").click(function(event){ alert("Thanks for visiting!"); }); }); </script> </head> <body> <a href="http://wordpress.org/">WordPress</a> </body> </html>

  13. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Getting Stared</title> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript“> $(document).ready(function(){ $("a").click(function(event){ alert("Thanks for visiting!"); event.preventDefault(); }); }); </script> </head> <body> <a href="http://wordpress.org/">WordPress</a> </body> </html>

  14. Plays well with others • $(“p”) or $(document)

  15. Plays well with others $(“p”) or $(document) By default, jQuery uses "$" as a shortcut for "jQuery"

  16. Plays well with others $(“p”) or $(document) By default, jQuery uses "$" as a shortcut for "jQuery" Can be used with other framework (like Prototype), which also use $()

  17. Plays well with others jQuery.noConflict(); jQuery(document).ready(function(){ jQuery("div").hide(); }); // Use Prototype with $(...), etc. $('someid').hide();

  18. <a href=“somepage.php” class=“external”>My Johns Hopkins</a> .external { background:url(../images/popout.gif) right top no-repeat; height:12px; padding-right:13px; } $('a.external').click(function(event){ window.open(this.href); });

  19. <a href=“somepage.php” class=“external”>My Johns Hopkins</a> .external { background:url(../images/popout.gif) right top no-repeat; height:12px; padding-right:13px; } $('a.external').click(function(event){ window.open(this.href); });

  20. jQuery UI

  21. jQuery UI

  22. jQuery UI Reference • Interactions • Draggable • Droppable • Sortable • Selectable • Resizable • Widgets • Accordion • Datepicker • Dialog • Progressbar • Slider • Tabs • Effects • Theming • Theming Overview • Theming API • ThemeRoller • jQuery API Reference • jQuery Core • Selectors • Attributes • Traversing • Manipulation • CSS • Events • Effects • Ajax • Utilities • Internals

  23. More on Selectors Element Returns: Array<Element(s)> Matches all elements with the given tag name. $("div").css("border","9px solid red");

  24. More on Selectors Element Returns: Array<Element(s)> Matches all elements with the given tag name. $("div").css("border","9px solid red"); #id Returns: Array<Element> Matches a single element with the given id attribute. $("#myDiv").css("border","3px solid red");

  25. More on Selectors Element Returns: Array<Element(s)> Matches all elements with the given tag name. $("div").css("border","9px solid red"); #id Returns: Array<Element> Matches a single element with the given id attribute. $("#myDiv").css("border","3px solid red"); .class Returns: Array<Element(s)> Matches all elements with the given class. $(".myClass").css("border","3px solid red");

  26. More on Selectors Element Returns: Array<Element(s)> Matches all elements with the given tag name. $("div").css("border","9px solid red"); #id Returns: Array<Element> Matches a single element with the given id attribute. $("#myDiv").css("border","3px solid red"); .class Returns: Array<Element(s)> Matches all elements with the given class. $(".myClass").css("border","3px solid red"); .class.class Returns: Array<Element(s)> Matches all elements with the given classes. $(".myClass.myOtherClass").css("border","3px solid red");

  27. Contextual Selectors & Chaining $("div p").css("border","9px solid red"); All the paragraphs in a div

  28. Contextual Selectors & Chaining $("div p").css("border","9px solid red"); All the paragraphs in a div $(“.post > img").slideDown("slow"); Finds all the images in the element with id #main

  29. Contextual Selectors & Chaining $("div p").css("border","9px solid red"); All the paragraphs in a div $(“.post > img").slideDown("slow"); Finds all the images in the element within the class .post $("tr:first").css("font-style", "italic"); Makes the font style for the first row in a table italicized

  30. Contextual Selectors & Chaining $("div p").css("border","9px solid red"); All the paragraphs in a div $(“.post > img").slideDown("slow"); Finds all the images in the element within the class .post $("tr:first").css("font-style", "italic"); Makes the font style for the first row in a table italicized $(this).not($("#nav > li.on")).removeClass("over"); Demonstrates chaining

  31. <div id="slideshow"> <img src="images/1.jpg" height="200" width="200" alt=“Amy Hopkins" /> <img src="images2.jpg" height="200" width="200" alt=“Jenn Hopkins" /> <img src="images/3.jpg" height="200" width="200" alt="Johns Hopkins" /> </div> $('#slideshow').cycle() jquery.cycle.lite.min.js 4kb http://malsup.com/jquery/cycle/lite/

  32. <div id="slideshow"> <img src="images/1.jpg" height="200" width="200" alt=“Amy Hopkins" /> <img src="images2.jpg" height="200" width="200" alt=“Jenn Hopkins" /> <img src="images/3.jpg" height="200" width="200" alt="Johns Hopkins" /> </div> $('#slideshow').cycle() jquery.cycle.lite.min.js 4kb http://malsup.com/jquery/cycle/lite/

  33. $(document).ready(function(){ $('#nav a').click(function () { $('#content').scrollTo($(this).attr('href'),800); return false; }); }); jquery.scrollTo-1.4.2-min.js 3kb jquery.localscroll-1.2.7-min.js 2kb http://flesler.blogspot.com/2007/10/jqueryscrollto.html

  34. $('.tops').corners("10px top-left top-right"); $('.bottoms').corners("10px bottom-left bottom-right"); $('.rounded').corners("7px"); $('.round').corners("10px"); $('.lefties').corners("10px top-left bottom-left "); jquery.corner.js 8kb not minified http://jquery.malsup.com/corner/

  35. $('.tops').corners("10px top-left top-right"); $('.bottoms').corners("10px bottom-left bottom-right"); $('.rounded').corners("7px"); $('.round').corners("10px"); $('.lefties').corners("10px top-left bottom-left "); $(".page_item").corners("10px top-left bottom-left "); jquery.corner.js 8kb not minified http://jquery.malsup.com/corner/

  36. var XMLHttpRequestObject = false; if (window.XMLHttpRequest) { XMLHttpRequestObject = new XMLHttpRequest( ); } else if (window.ActiveXObject) { XMLHttpRequestObject = new ActiveXObject(“Microsoft.XMLHTTP”); } function getData(dataSource, divID){ if(XMLHttpRequestObject) { var obj = document. getElementById(divID); XMLHttpRequestObject.open(“GET”, dataSource); XMLHttpRequestObject.onreadystatechange = function( ) { if (XMLHttpRequestObject.readyState = = 4 && XMLHttpRequestObject.status = = 200) { obj.innerHTML =XMLHttpRequestObject.responseText; } } <form> <input type=“button” value=“Fetch the message” onclick=“getData(‘message.txt’,‘targetDiv’)”> </form>

  37. $(document).ready(function(){ $("div").load("message.txt"); });

  38. $.ajax({ type: "POST", url: "some.php", data: "name=Jim&location=Baltimore", success: function(msg){ alert( "Data Saved: " + msg ); } });

  39. var library = { 'name' :‘Enoch Pratt', '@open' : ‘1940-17-7', 'address' : { 'city' : ‘Baltimore', 'zip' : '12345', 'state' : 'MD', 'street' : ‘Cathedral' }, 'books':[ { 'title' : 'Harry Potter', 'isbn' : '1234-1234', 'category' : 'Childrens', 'available' : '3', 'chapters' : [ 'Chapter 1', 'Chapter 2' ] }, { 'title' : 'Brief History of time', 'isbn' : '1234-ABCD', 'category' : 'Science', 'chapters' : [ '1', '2' ] } ]}; JSON (JavaScript Object Notation)

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