jquery Handbook Core function collation. doc

JQuery core Functions

The former is the lookup object, the latter is the range of the former lookup

$ (argunment)

JQuery ([Selector,[context]])

Parameters

$ (Selector,[context])

Selector the string to be searched for

The element set, document, or JQuery object that the context is looking for

Eg----$ (' P ', ' [Class=two] '). CSS (' Color ', ' red ')

$ (' P ', ' [Class=one],[class=two] '). CSS (' Color ', ' red ')

Elements a DOM element for encapsulation into a JQuery object

Eg----$ (' #id ')

Object one for encapsulating into JQuery objects

Elementarray a DOM array to encapsulate as a JQuery object

jquery object one for cloning of jquery objects

jquery () returns an empty jquery object

---------------------------------

Jqueryjquery (Html,[ownerdocument])

(1.8*)

Parameters

$ (html,[ownerdocument])

HTML tag string for dynamically creating DOM elements

Ownerdocument creating a Document object where DOM elements reside

$ (Html,props)

HTML tag string for dynamically creating DOM elements

Ownerdocument properties, events, and methods that are used to attach to newly created elements

Not valid in IE:

$ ("<input>"). attr ("type", "checkbox");

Valid in IE:

$ ("<input type= ' checkbox ' >");

-----------------------------

$ ("<div>", {

"Class": "Test",

Text: "Click me!",

Click:function () {

$ (this). Toggleclass ("test");

}

}). AppendTo ("body");

-----------------------------

$ ("<input>", {

Type: "Text",

Val: "Test",

Focusin:function () {

$ (this). AddClass ("active");

},

Focusout:function () {

$ (this). Removeclass ("active");

}

}). AppendTo ("form");

-----------------------------

Callback is function

JQuery (callback)

$ (document). Ready () {

code block

}

Equivalent ↓ Shorthand

$ (function () {

code block

})

-----------------------------

Jquery.holdready (Hold)

(1.6+)

$.holdready (TRUE);

$.getscript ("Myplugin.js", function () {

$.holdready (FALSE);

});

JQuery Object Access

Each Traversal object

Index is an indexed value

Value is the object itself

function (Index)

function (Index,value)

each (callback)

<button>change colors</button>

<span></span>

<div></div>

<div></div>

<div></div>

<div></div>

<div id= "Stop" >stop here</div>

<div></div>

<div></div>

<div></div>

$ ("button"). Click (function () {

Index is indexed subscript value is the current incoming object value

$ ("div"). each (function (index, value) {

Value = = This

$ (value). CSS ("BackgroundColor", "yellow");

If this is #stop

if ($ (this). Is ("#stop")) {

$ ("span"). Text ("Stopped at Div Index #" + index);

and exits each traversal

return false;

}

});

});

----------------------------------

Size ()

Size () is the number of Get elements

$ (' div '). Size ()

----------------------------------

Length

Length is to get the lengths

var arr = [I/C, ' A ', ' B ',.. ' N ']

Arr.length;

$ (' div '). length

----------------------------------

Selector

. selector as a selector string

The results are <ul> <li> Div </li> </ul>

$ (' ul '). Append (' <li> ' + $ (' div '). Selector + ' </li> ')
$ (' ul '). Append (' <li> ' + ' div ' + ' </li> ')
----------------------------------

Context

Return Object HTMLDocument
$ (' ul ', ' div '). Context

Returns a string #document
$ (' ul ', ' div '). Context.nodename

----------------------------------

Get ([index])

Index is the indexed value, the actual DOM element, and directly operates on him, not through the JQuery function, $ (this). Get (0) and $ (this) [0] equivalent

$ (' div '). Get (0)

$ (' div ') [0]

----------------------------------

return value: Numberindex ([selector|element])

If the. Index () method does not pass arguments, the return value is the position of the first element in the collection of jquery objects relative to its sibling element

<ul>

<li id= "foo" >foo</li>

<li id= "Bar" >bar</li>

<li id= "Baz" >baz</li>

</ul>

Parameters

Index ()

Returns the index position in the sibling

$ (' #bar '). index ();

Seletor

A selector that represents a jquery object that will look up elements from this object

Element

Gets the element of the index position, which can be either a DOM element or a jQuery selector

The following are the index locations that return Li

$ (' #bar '). Index (' Li ');

$ (' li '). Index ($ (' #bar '));

$ (' li '). Index ($ (' li:gt (0) '));

$ (' li '). Index (document.getElementById (' Bar '));

Data caching

Data ([Key],[value])

Storing data on elements, returning jquery objects

If the jquery collection points to more than one element, the corresponding data is set on all elements, and the function does not create a new expando, it can store any formatted data on an element, not just the string

Parameters

Key

The stored data name.

$ (' div '). Date (' name ');

Key,value

Key: The stored data name

Value: Any data that will be stored

$ (' div '). Date (' name ', ' KK ');

Obj

A key/value pair for setting the data

$ (' div '). Date (' obj ', {' name ': ' KK ', ' sex ': ' Man '});

Data ()

----------------------------------------------

Removedata ([name|list])

Parameters

Name

The stored data name.

List

Move an array or a space-separated string

Queue control

Queue (Element,[queuename])

Display or manipulate a function queue that executes on a matching element

Parameters

Element,[queuename]

Element checks for additional queued DOM elements

QueueName string value, containing the name of the sequence, the default is FX, the standard effect sequence

Element,queuename,newqueue

Element checks for additional queued DOM elements

QueueName string value, containing the name of the sequence, the default is FX, the standard effect sequence

Newqueue An array that replaces the contents of the current function queue

Element,queuename,callback ()

Element checks for additional queued DOM elements

QueueName string value, containing the name of the sequence, the default is FX, the standard effect sequence

Callback () functions to add to the queue

<script>

$ (document.body). Click (function () {

The parameters are displayed slowly.

$ ("div"). Show ("slow");

Performs left property value +=200 on elements that are not animated, and delays 2000 milliseconds

$ ("div"). Animate ({left: ' +=200 '},2000);

Operations to join a queue function

$ ("div"). Queue (function () {

$ (this). addclass ("Newcolor");

Remove the previous join queue function and execute it

$ (this). Dequeue ();

});

Ditto

$ ("div"). Animate ({left: '-=200 '},5000);

Ditto

$ ("div"). Queue (function () {

$ (this). Removeclass ("Newcolor");

Ditto

$ (this). Dequeue ();

});

$ ("div"). Slideup ();

});

</script>

Dequeue ([QueueName])

The same as queue name defaults to FX

Remove the. Queue () created queues and execute (KK)

Remove a queue function from the front of the queue and perform his

Clearqueue ([QueueName])

Empty a queue that has not yet been executed on an object

Without parameters, the default is to empty the animation queue, which is similar to stop (true), but stop () can only empty the animation queue, which clears all queues created by. Queue ()

Plug-in mechanism

$.fn.extend (object)

Extend the JQuery element set to provide new methods (usually used to make plugins)

Parameters

Object

Used to augment JQuery objects

$.fn.extend Creating an JQ object

JQuery.fn.extend ({

Property is check example $.check

Check:function () {

Return This.each (function () {this.checked = true;});

},

Property is check example $.uncheck

Uncheck:function () {

Return This.each (function () {this.checked = false;});

}

});

$ ("Input[type=checkbox]"). Check ();

$ ("Input[type=radio]"). Uncheck ();

---------------------------------

Jquery.extend

Add function

Jquery.extend ({

Min:function (A, b) {return a < b a:b;},

Max:function (A, b) {return a > b a:b;}

});

$.min (A, B)

Docu Coexistence jquery.noconflict ([extreme])

Run this function to pass control of the variable $ to the first library that implements it.

Parameters

Excluding $ in jquery maps the referenced object back to the original object

Jquery.noconflict ();

The jquery library can only be used with jquery or

var JQ = JQuery

jquery Handbook Core function collation. doc