jQueryData.txt

JQuery  is lightweight javascript library that is used by million of users.

Document.ready function is called even before the css and called just after DOM is fully loaded.

$(document).ready(function(){
		$("#button1").click(function(){
			alert("clicked");
		})
	});

Document.load function will be fired after loading all the css and other things.

$(document).load(function(){
		$("#button1").click(function(){
			alert("clicked");
		})
	});

Placement of script is important in jQuery.

CDN= Content Delivery Network which holds all the css images etc required in the webPage.
If we want to load from another server then we use CDN.
window.jQuery|| document.write("<script src= '//sourceof script'><\/script>")

jQuery SELECTORs are used to select various elements from DOM(Document Object Model) tree by:
ElementName
ElementID
ElementClass
ElementAttribute


document.getElementById is faster than $(#id) becaus it will give the functionality provided by jQuery.

If element is a desendent then place space between them for ex. $('table (space NO comma) tr').each(function(){alert($(this).html()});
to print the every row in a new dialouge box in alertbox.

For Odd and Even purposes use $('tr : even').css('background-color','blue');
Similarly we can use it with css. Forex: $(.class,.big).css('background-color','blue');

Filter is used to filter the elements. Forex: $('li').filter(':even').css('background-color','yellow');

AttributeSelector is used to select the elements based on the attribute values.(Should be enclosed in Square-Bracktes Only)
Forex: $('[title]') To select all elements who has title attribute.
	   $('div[title]') To select all div elements who has title attribute
	   We can also specify values such as  $('div[title="Class1"]') Will select all the records who as Class1 as title in Div.
	   Also $('div[title][style]') will select all attributes who has title as well as style.
	   To specify OR condition specify comma(,) between $('div[title],[style]')
	   
'\' is a escape character so it doesnt check the next quotes and ignore them.

$("input") is used to select the input records only not the drop-down menu items and textarea whereas $(":input") is used to select all the input records.

To convert JSON object to a string use JSON.stringify() method while if we want  to convert string object to JSON we need JSON.parse method.

('div').wrap("<div class='divContainer'></div>") is used to wrap all the elements of the existing div tag into divContainer. After execution of this instruction
all the elements will be have a seperate  'divContainer' named class. So if 3 div elements are there then 3 class named as divContainer will be present

(div).unrap(); Doesnt take any arguments and unwraps all the nested elements.ie. it removese the parent of set of matched elements.

(div).wrapAll("<div class='divContainer'></div>") is same as wrap but only difference is it will wrap all the elemts in single divContainer class unline wrap method
which creates 3 divContainer named classes.

wrapInner will wrap divContainer class inside of each div element.

If ur inserting or using appendTo or PrependTo then you should specify the HTML tag as well so as to work.

insert and insertBefore has the same behaviour as append and appendTo.

Similarly after and insertAfter will work.

.each() function is used t iterate over the jQuery object whereas $.each() is used to iterate over JAVASCRIPT array/object.
instead of result+=$(this).text(); we can use 
result.push($(this).text());
.map() function is similar to each function but we dont need to specify object inside instead  we use get method at the end

var a=$('li).map(function(){
	return $(this).text();
}).get().join('|');
so a will contain all the text of li elements seperated by '|'.
each method can be TERMINATED by using return false BUT MAP method CANNOT be terminated even if we return false.
each method is IMMUTABLE we cannot change values of original dataset whereas Map methodis mutable.

jQuery change() event is used to handle the change event of textboxes, select , text-area.

mouseover and mouseout are same whereas mouseenter and mouse leave are alternatie for it as well as  hover is there.

javascript uses event.which to deteremine which mouse button is clicked in case of IE8 or later the codes are:
switch(event.which){ case 1: left clicked;break; case 2:middle clicked;break; case 3:right clicked;brea;}
in case of IE7 or earlier versions:
switch(event.button)1:left 2:right 4:middle
in jQuery it uses button.which and normalizes even the beowser is IE7 or later so single code is used to work againts multiple browsers.

$('btn1').bind('click mouseover mousedown',function(event)) is used to bind the btn1 to 3 events so we can write nxt line as follows:
if(event.type=='click'){alert("btn clicked"};
else if(event.type=='mouseover'){alert("mouse over event");}
NOTE:THERE SHOULD BE ONLY 1 SINGLE QUOTE AND NO COMMAS TO SEPERATE EVENTS
in jQuery 1.7 or higher bind and unbind are replaced by on() and off().

EVENT DELEGATION was earlier used as delegate and now replaced by on(). It is similiar to delegate function event delegate syntax is as follows:
$('ul').on('click','li',function(){
alert(hii});
this functionwill be triggered if any item in ul list is clicked so only one handler is present for all li items thats event delegation.
And to undelegeate use off function.
Live and die function ae similar to on and off function and it is REMOVED from jquery 1.7 and the main difference between on and live is that 
live function will modify the DOM element whereas the on function will modify the parent element.

To detect whether any evennt is attached to element we have to use $._data() function forex:
var jQueryElement=$('btn1');
var domElement=jQueryElement.get(0);
var events=$._data(domElement,'events');
if(events ==undefined){alert(no events attached);}

Load function is used to load the data from server it conisit of 3 parameters {url,data,response}
alternative for load is get the difference between the 2 is load is used to load only html data whereas get is used to load html as well as xml, json etc data

we can specify multiple evennts using ON such as .on({click:function(){  }, onMouseOver: function(){ },etc)

Focus and blur event is used to take the focus as well as to get the blur event from there.