The original jQuery source code, released Jan 14th, 2006 at BarCamp NYC.

View the annotations using Genius. Not shown: Ajax module, FX module, Advanced Events Module

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Raw source code

/*

* JQuery (http://jquery.com/)

* By John Resig (http://ejohn.org/)

* Under an Attribution, Share Alike License

*/

function $(a,c) {

if ( a == null ) return;

// Since we're using Prototype's $ function,

// be nice and have backwards compatability

if ( typeof Prototype != "undefined" && a.constructor == String ) {

var re = new RegExp( "[^a-zA-Z0-9_-]" );

if ( !re.test(a) ) {

var c = ((c&&c.documentElement) || document);

if ( c.getElementsByTagName(a).length == 0 ) {

var obj = c.getElementById(a);

if ( obj != null ) return obj;

}

}

}

// Load Dynamic Function List

var self = {

cur: $.Select(a,c),

// The only two getters

size: function() {

return this.get().length;

},

get: function(i) {

if ( i == null )

return this.$$unclean ? $.sibling(this.$$unclean[0]) : this.cur;

else

return (this.get())[i];

},

"_get": function(i) {

if ( i == null )

return this.cur;

else

return this.cur[i];

},

each: function(f) {

for ( var i = 0; this.cur && i < this._get().length; i++ ) {

if ( this._get(i) ) {

this._get(i).$$tmpFunc = f;

this._get(i).$$tmpFunc(i);

this._get(i).$$tmpFunc = null;

}

}

return this;

},

set: function(a,b) {

return this.each(function(){

if ( b == null )

for ( var j in a )

this[j] = a[j];

else {

if ( b.constructor != String ) {

for ( var i in b ) {

var c = $.Select(i,this);

for ( var j in c )

c[j][a] = b[i];

}

} else

this[a] = b;

}

});

},

html: function(h) {

return this.set( "innerHTML", h );

},

// Deprecated

style: function(a,b){ return this.css(a,b); },

css: function(a,b) {

return this.each(function(){

if ( !b )

for ( var j in a )

this.style[j] = a[j];

else

this.style[a] = b;

});

},

toggle: function() {

return this.each(function(){

var d = $.getCSS(this,"display");

if ( d == "none" || d == '' )

$(this).show();

else

$(this).hide();

});

},

show: function(a) {

return this.each(function(){

this.style.display = this.$$oldblock ? this.$$oldblock : 'block';

});

},

hide: function(a) {

return this.each(function(){

this.$$oldblock = $.getCSS(this,"display");

this.style.display = 'none';

});

},

addClass: function(c) {

return this.each(function(){

if ($.hasWord(this,c)) return;

this.className += ( this.className.length > 0 ? " " : "" ) + c;

});

},

removeClass: function(c) {

return this.each(function(){

if (!$.hasWord(this,c)) return;

var ret = "";

var s = this.className.split( " " );

for ( var i = 0; i < s.length; i++ )

if ( s[i] != c )

ret += ( ret.length > 0 ? " " : "" ) + s[i];

this.className = ret;

});

},

remove: function() {

this.each(function(){this.parentNode.removeChild( this );});

this.cur = [];

return this;

},

wrap: function() {

var a = $.clean(arguments);

return this.each(function(){

var b = a[0].cloneNode(true);

this.parentNode.insertBefore( b, this );

while ( b.firstChild ) b = b.firstChild;

b.appendChild( this );

});

},

append: function() {

var a = $.clean(arguments);

return this.each(function(){

for ( var i in a )

if ( a[i].cloneNode != null )

this.appendChild( a[i].cloneNode(true) );

});

},

appendTo: function() {

var self = this;

var a = arguments;

return this.each(function(){

for ( var i = 0; i < a.length; i++ ) {

if ( self.$$unclean )

$(a[i]).append( self.get() );

else

$(a[i]).append( this );

}

});

},

prepend: function() {

var a = $.clean(arguments);

return this.each(function(){

for ( var i = a.length - 1; i >= 0; i-- )

this.insertBefore( a[i].cloneNode(true), this.firstChild );

});

},

before: function() {

var a = $.clean(arguments);

return this.each(function(){

for ( var i in a )

this.parentNode.insertBefore( a[i].cloneNode(true), this );

});

},

after: function() {

var a = $.clean(arguments);

return this.each(function(){

for ( var i = a.length - 1; i >= 0; i-- )

this.parentNode.insertBefore( a[i].cloneNode(true), this.nextSibling );

});

},

bind: function(t,f) {

return this.each(function(){addEvent(this,t,f);});

},

unbind: function(t,f) {

return this.each(function(){removeEvent(this,t,f);});

},

find: function(t) {

var old = [], ret = [];

this.each(function(){

old.push( this );

ret = $.merge( ret, $.Select(t,this) );

});

this.old = old;

this.cur = ret;

return this;

},

end: function() {

this.cur = this.old;

return this;

},

filter: function(t) {

this.cur = $.filter(t,this.cur).r;

return this;

},

not: function(t) {

if ( t.constructor == String )

this.cur = $.filter(t,this.cur,false).r;

else

this.cur = $.grep(this.cur,function(a){return a != t;});

return this;

},

add: function(t) {

if ( t.constructor == String )

this.cur = $.merge(this.cur,$.Select(t));

else if ( t.constructor == Array )

this.cur = $.merge(this.cur,t);

else

this.cur = $.merge(this.cur,new Array(t));

return this;

}

};

for ( var i in $.fn ) {

if ( self[i] != null )

self["_"+i] = self[i];

self[i] = $.fn[i];

}

if ( typeof Prototype != "undefined" && a.constructor != String ) {

for ( var i in self ) {(function(j){

try {

if ( j.indexOf('on') != 0 || j == "onready" ) {

a[j] = function() {

return self[j].apply(self,arguments);

};

}

} catch (e){}

})(i);}

return a;

}

return self;

}

function $C(a) {

if ( a.indexOf('<') >= 0 ) {

if ( a.indexOf('<tr') >= 0 ) {

var r = $C("table").html("<tbody>"+a+"</tbody>");

r.$$unclean = r.get(0).childNodes[0].childNodes;

} else {

var r = $C("div").html(a);

r.$$unclean = r.get(0).childNodes;

}

return r;

} else {

return $(document.createElement(a),document);

}

}

$.getCSS = function(e,p) {

if (e.style[p])

return e.style[p];

else if (e.currentStyle)

return e.currentStyle[p];

else if (document.defaultView && document.defaultView.getComputedStyle) {

p = p.replace(/([A-Z])/g,"-$1");

p = p.toLowerCase();

return document.defaultView.getComputedStyle(e,"").getPropertyValue(p);

} else

return null;

};

$.clean = function(a) {

var r = new Array();

for ( var i = 0; i < a.length; i++ ) {

if ( a[i].constructor == String ) {

//a[i] = a[i].replace( /#([a-zA-Z0-9_-]+)/g, " id='$1' " );

//a[i] = a[i].replace( /\.([a-zA-Z0-9_-]+)/g, " class='$1' " );

var div = document.createElement("div");

div.innerHTML = a[i];

for ( var j = 0; j < div.childNodes.length; j++ )

r.push( div.childNodes[j] );

} else if ( a[i].length ) {

for ( var j = 0; j < a[i].length; j++ )

r.push( a[i][j] );

} else {

r.push( a[i] ); //.cloneNode(true) );

}

}

return r;

};

$.g = {

'': "m[2] == '*' || a.nodeName.toUpperCase() == m[2].toUpperCase()",

'#': "a.id == m[2]",

':': {

lt: "i < m[3]-0",

gt: "i > m[3]-0",

nth: "m[3] - 0 == i",

eq: "m[3] - 0 == i",

first: "i == 0",

last: "i == r.length - 1",

even: "i % 2 == 0",

odd: "i % 2 == 1",

"first-child": "$.sibling(a,0).cur",

"nth-child": "(m[3] == 'even'?$.sibling(a,m[3]).n % 2 == 0 :(m[3] == 'odd'?$.sibling(a,m[3]).n % 2 == 1:$.sibling(a,m[3]).cur))",

"last-child": "$.sibling(a,0,true).cur",

"nth-last-child": "$.sibling(a,m[3],true).cur",

"first-of-type": "$.ofType(a,0)",

"nth-of-type": "$.ofType(a,m[3])",

"last-of-type": "$.ofType(a,0,true)",

"nth-last-of-type": "$.ofType(a,m[3],true)",

"only-of-type": "$.ofType(a) == 1",

"only-child": "$.sibling(a).length == 1",

parent: "a.childNodes.length > 0",

empty: "a.childNodes.length == 0",

lang: "a.lang == m[3]",

root: "a == ( a.ownerDocument ? a.ownerDocument : document ).documentElement",

contains: "(a.innerText || a.innerHTML).indexOf(m[3]) != -1",

visible: "(!a.type || a.type != 'hidden') && ($.getCSS(a,'display') != 'none' && $.getCSS(a,'visibility') != 'hidden')",

hidden: "(a.type && a.type == 'hidden') || $.getCSS(a,'display') == 'none' || $.getCSS(a,'visibility') == 'hidden'",

enabled: "a.disabled == false",

disabled: "a.disabled",

checked: "a.checked",

indeterminate: "a.checked != null && !a.checked"

},

".": "$.hasWord(a.className,m[2]) || $.hasWord(a.getAttribute('class'),m[2])",

"@": {

"=": "a.getAttribute(m[3]) == m[4]",

"!=": "a.getAttribute(m[3]) != m[4]",

"~=": "$.hasWord(a.getAttribute(m[3]),m[4])",

"|=": "a.getAttribute(m[3])?a.getAttribute(m[3]).indexOf(m[4])==0:false",

"^=": "a.getAttribute(m[3])?a.getAttribute(m[3]).indexOf(m[4])==0:false",

"$=": "a.getAttribute(m[3]) != null ? a.getAttribute(m[3]).substr( a.getAttribute(m[3]).length - m[4].length, m[4].length ) == m[4] : false",

"*=": "a.getAttribute(m[3])?a.getAttribute(m[3]).indexOf(m[4]) != -1 : false",

"": "m[3] == '*' ? a.attributes.length > 0 : a.getAttribute(m[3])"

},

"[": "$.Select(m[2],a).length > 0"

};

// Frequently-used Accessors

window.cssQuery = $.Select;

document.getElementsByClass = function(a){return $.Select("."+a)};

document.getElementsBySelector = $.Select;

$.fn = {};

$.Select = function( t, context ) {

if ( context == null )

var context = document;

if ( t.constructor != String )

return new Array( t );

if ( t.indexOf("//") == 0 ) {

context = context.documentElement;

t = t.substr(2,t.length);

} else if ( t.indexOf("/") == 0 ) {

context = context.documentElement;

t = t.substr(1,t.length);

// Assume the root element is right :(

if ( t.indexOf('/') )

t = t.substr(t.indexOf('/'),t.length);

}

// Make Xpath Axes Sane

var re = new RegExp( "/?descendant::", "i" );

t = t.replace( re, " " );

var re = new RegExp( "/?child::", "i" );

t = t.replace( re, "/" );

// If only...

//var re = new RegExp( "/?following-sibling::", "i" );

//t = t.replace( re, " + " );

var re = new RegExp( "/?preceding-sibling::", "i" );

t = t.replace( re, " ~ " );

var re = new RegExp( "/?self::", "i" );

t = t.replace( re, "" );

var re = new RegExp( "/?parent::", "i" );

t = t.replace( re, " .. " );

// following

// preceding

// ancestor

// ancestor-or-self

// descendant-or-self

var ret = new Array( context );

var done = new Array();

var last = null;

while ( t.length > 0 && last != t ) {

var r = new Array();

last = t;

t = $.cleanSpaces(t);

var re = new RegExp( "^//", "i" );

t = t.replace( re, "" );

if ( t.indexOf('..') == 0 || t.indexOf('/..') == 0 ) {

if ( t.indexOf('/') == 0 )

t = t.substr(1,t.length);

r = $.map( ret, function(a){ return a.parentNode; } );

t = t.substr(2,t.length);

t = $.cleanSpaces(t);

} else if ( t.indexOf('>') == 0 || t.indexOf('/') == 0 ) {

r = $.map( ret, function(a){ return ( a.childNodes.length > 0 ? $.sibling( a.firstChild ) : null ); } );

t = t.substr(1,t.length);

t = $.cleanSpaces(t);

} else if ( t.indexOf('+') == 0 ) {

r = $.map( ret, function(a){ return $.sibling(a).next; } );

t = t.substr(1,t.length);

t = $.cleanSpaces(t);

} else if ( t.indexOf('~') == 0 ) {

r = $.map( ret, function(a){

var r = new Array();

var s = $.sibling(a);

if ( s.n > 0 )

for ( var i = s.n; i < s.length; i++ )

r.push( s[i] );

return r;

} );

t = t.substr(1,t.length);

t = $.cleanSpaces(t);

} else if ( t.indexOf(',') == 0 || t.indexOf('|') == 0 ) {

if ( ret[0] == context ) ret.shift();

done = $.merge( done, ret );

r = ret = new Array( context );

t = " " + t.substr(1,t.length);

} else {

var re = new RegExp( "^([#.]?)([a-z0-9\\*-]*)", "i" );

var m = re.exec(t);

if ( m[1] == "#" ) {

var oid = document.getElementById(m[2]);

if ( oid != null ) r = [ oid ];

else r = [];

}

if ( m[2] == "" || m[1] == "." ) m[2] = "*";

else t = t.replace( re, "" );

for ( var i = 0; i < ret.length; i++ ) {

var o = ret[i];

if ( o ) {

switch( m[2] ) {

case '*':

r = $.merge( $.getAll(o), r );

break;

case 'text': case 'radio': case 'checkbox': case 'hidden':

case 'button': case 'submit': case 'image': case 'password':

case 'reset': case 'image': case 'file':

r = $.merge( $.grep( o.getElementsByTagName( "input" ),

function(a){ return a.type == m[2] }), r );

break;

case 'input':

r = $.merge( o.getElementsByTagName( "input" ), r );

r = $.merge( o.getElementsByTagName( "select" ), r );

r = $.merge( o.getElementsByTagName( "textarea" ), r );

break;

default:

r = $.merge( o.getElementsByTagName( m[2] ), r );

break;

}

}

}

}

var val = $.filter(t,r);

r = val.r;

t = val.t;

t = $.cleanSpaces(t);

ret = r;

}

if ( ret && ret[0] == context ) ret.shift();

done = $.merge( done, ret );

return done;

};

$.filter = function(t,r,not) {

var g = $.grep;

if ( not == false ) var g = function(a,f) {return $.grep(a,f,true);};

while ( t.length > 0 && t.match(/^[:\\.#\\[a-zA-Z\\*]/) ) {

var re = new RegExp( "^\\[ *@([a-z0-9\\(\\)-]+) *([~!\\|\\*$^=]*) *'?\"?([^'\"]*)'?\"? *\\]", "i" );

var m = re.exec(t);

if ( m != null ) {

m = new Array( '', '@', m[2], m[1], m[3] );

} else {

var re = new RegExp( "^(\\[) *([^\\]]*) *\\]", "i" );

var m = re.exec(t);

if ( m == null ) {

var re = new RegExp( "^(:)([a-z0-9\\*-]*)\\( *[\"']?([^ \\)'\"]*)['\"]? *\\)", "i" );

var m = re.exec(t);

if ( m == null ) {

var re = new RegExp( "^([:\\.#]*)([a-z0-9\\*-]*)", "i" );

var m = re.exec(t);

}

}

}

t = t.replace( re, "" );

if ( m[1] == ":" && m[2] == "not" )

r = $.filter(m[3],r,false).r;

else {

if ( $.g[m[1]].constructor == String )

var f = $.g[m[1]];

else if ( $.g[m[1]][m[2]] )

var f = $.g[m[1]][m[2]];

if ( f != null ) {

eval("f = function(a,i){return " + f + "}");

r = g( r, f );

}

}

}

return { r: r, t: t };

};

$.cleanSpaces = function(t) {

var re = new RegExp("^\\s+");

t = t.replace( re, "" );

var re = new RegExp("\\s+$");

t = t.replace( re, "" );

return t;

};

$.ofType = function(a,n,e) {

var t = $.grep($.sibling(a),function(b){return b.nodeName == a.nodeName});

if ( e ) n = t.length - n - 1;

return n != null ? t[n] == a : t.length;

};

$.sibling = function(a,n,e) {

var type = new Array();

var tmp = a.parentNode.childNodes;

for ( var i = 0; i < tmp.length; i++ ) {

if ( tmp[i].nodeType == 1 )

type.push( tmp[i] );

if ( tmp[i] == a )

type.n = type.length - 1;

}

if ( e ) n = type.length - n - 1;

type.cur = ( type[n] == a );

type.prev = ( type.n > 0 ? type[type.n - 1] : null );

type.next = ( type.n < type.length - 1 ? type[type.n + 1] : null );

return type;

};

$.hasWord = function(e,a) {

if ( e == null ) return false;

if ( e.className != null ) e = e.className;

var s = e.split( " " );

for ( var i = 0; i < s.length; i++ )

if ( s[i] == a ) return true;

return false;

};

$.getAll = function(o,r) {

if(!r) var r = new Array();

var s = o.childNodes;

for ( var i = 0; i < s.length; i++ ) {

if ( s[i].nodeType == 1 ) {

r.push(s[i]);

$.getAll( s[i], r );

}

}

return r;

};

$.merge = function(a,b) {

for ( var i = 0; i < a.length; i++ ) {

var c = true;

for ( var j = 0; j < b.length; j++ )

if ( a[i] == b[j] )

c = false;

if ( c )

b.push( a[i] );

}

return b;

};

$.grep = function(a,f,s) {

var r = new Array();

if ( a != null )

for ( var i = 0; i < a.length; i++ )

if ( (!s && f(a[i],i)) || (s && !f(a[i],i)) )

r.push( a[i] );

return r;

};

$.map = function(a,f) {

var r = new Array();

for ( var i = 0; i < a.length; i++ ) {

var t = f(a[i],i);

if ( t != null ) {

if ( t.constructor != Array ) t = new Array(t);

r = $.merge( t, r );

}

}

return r;

};

// addEvent/removeEvent

// Original by Dean Edwards

// Modified by John Resig

function addEvent(element, type, handler) {

if (!handler.$$guid) handler.$$guid = addEvent.guid++;

if (!element.events) element.events = {};

var handlers = element.events[type];

if (!handlers) {

handlers = element.events[type] = {};

if (element["on" + type])

handlers[0] = element["on" + type];

}

handlers[handler.$$guid] = handler;

element["on" + type] = handleEvent;

};

addEvent.guid = 1;

function removeEvent(element, type, handler) {

if (element.events) {

if (type && element.events[type]) {

if ( handler ) {

delete element.events[type][handler.$$guid];

} else {

for ( var i in element.events[type] )

removeEvent( element, type, element.events[type][i] );

}

} else {

for ( var i in element.events )

removeEvent( element, i );

}

}

};

function handleEvent(event) {

var returnValue = true;

event = event || fixEvent(window.event);

var handlers = [];

for ( var i in this.events[event.type] )

handlers.push( this.events[event.type][i] );

//var handlers = this.events[event.type];

for (var i in handlers) {

try {

if ( handlers[i].constructor == Function ) {

this.$$handleEvent = handlers[i];

if (this.$$handleEvent(event) === false) {

event.preventDefault();

event.stopPropagation();

returnValue = false;

}

}

} catch(e){}

}

return returnValue;

};

function fixEvent(event) {

event.preventDefault = fixEvent.preventDefault;

event.stopPropagation = fixEvent.stopPropagation;

return event;

};

fixEvent.preventDefault = function() {

this.returnValue = false;

};

fixEvent.stopPropagation = function() {

this.cancelBubble = true;

};

// Move to module

$.fn.text = function(e) {

if ( !e ) var e = this.cur;

var t = "";

for ( var j = 0; j < e.length; j++ ) {

for ( var i = 0; i < e[j].childNodes.length; i++ )

t += e[j].childNodes[i].nodeType != 1 ?

e[j].childNodes[i].nodeValue :

$.fn.text(e[j].childNodes[i].childNodes);

}

return t;

};

setTimeout(function(){

if ( typeof Prototype != "undefined" && $.g == null && $.clean == null )

throw "Error: You are overwriting jQuery, please include jQuery last.";

}, 1000);