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jquery Library-Feature base jquery instance
JQuery is a library of JavaScript functions. The following example shows the hide of JQuery
The JQuery library contains the following attributes: instance
HTML element Selection HTML element Manipulation CSS operation <script Type= "Text/java
HTML event function <script type= "TEXT/JAVASCR
JavaScript effects and animations $ (document). Ready (function
The HTML DOM iterates and modifies $ ("button"). Click (function
AJAX $ ("P"). Hide ();
Utilities});
});
</script>
<body>
<p>this is a paragraph.</p
<p>this is another Paragra
<button type= "button" >clic
</body>
JQuery syntax
The jQuery syntax is for the selection of HTML elements, and you can perform certain operations on elements.
The underlying syntax is: $ (selector). Action ()
Dollar sign definition JQuery
Selector (selector) "Query" and "find" HTML elements
JQuery Action () performs an action on an element
Instance
$ (this). Hide ()-hides the current element
$ ("P"). Hide ()-Hides all paragraphs
$ ("p.test"). Hide ()-Hides all class= "test" paragraphs
$ ("#test"). Hide ()-hides all elements of the id= "test"
Tip: The syntax used by JQuery is a combination of XPath and CSS selector syntax. In the next chapters of this tutorial, you will learn more about selectors syntax.
Conclusion
Because JQuery is specifically designed to handle HTML events, your code is more appropriate and easier to maintain when you follow these guidelines:
Put all jQuery code in the event handler
Place all event handlers in the document-ready event handler
Put the JQuery code in a separate. js file
Rename the JQuery library if there is a name conflict
The JQuery event Hide () and show () can all be set to two
Here are some examples of event functions in JQuery: syntax:
The Event function binds the function to $ (selector). Hide (speed,cal
Ready Events for documents
(When the HTML document is ready
Use) $ (selector). Show (speed,cal
$ (selector). Click event callback parameter of selected element is in hide or show
$ (selector). DblClick (function
The double-click event of the selected element can set these values by the speed parameter: "Slow
$ (selector). The focus event instance for the focus (function) selected element
$ (selector). MouseOver (func
tion) The selected element's mouse hover event $ ("button"). Click (function
(selector) jQuery element selector $ ("P"). Hide (1000);
});
JQuery Toggle
The jQuery toggle () function uses the show () or hide () function to toggle the visible state of an HTML element.
Hides the displayed elements, showing the hidden elements.
Grammar:
$ (selector). Toggle (Speed,callback)
The speed parameter can set these values: "Slow", "fast", "normal", or milliseconds.
$ (document). Ready (Functio
N
Instance
$ ("button"). Click (function () {
$ ("P"). Toggle ();
});
JQuery sliding Functions-Slidedown, Slideup, Slidetoggle
JQuery has the following sliding functions:
$ (selector). Slidedown (Speed,callback)
$ (selector). Slideup (Speed,callback)
$ (selector). Slidetoggle (Speed,callback)
The speed parameter can set these values: "Slow", "fast", "normal", or milliseconds.
The callback parameter is the name of the function that is executed after the hide or show function finishes. You will learn more about the callback parameters in the sections below in this tutorial.
Slidedown () instance
$ (". Flip"). Click (function () {
$ (". Panel"). Slidedown ();
});
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Slideup () instance
$ (". Flip"). Click (function () {
$ (". Panel"). Slideup ()
})
Tiy
Slidetoggle () instance
$ (". Flip"). Click (function () {
$ (". Panel"). Slidetoggle ();
});
JQuery Custom Animations
The JQuery function creates the syntax for custom animations:
$ (selector). Animate ({Params},[duration],[easing],[callback])
The key parameter is the params. It defines the properties that produce the animation. You can set multiple such properties at the same time:
Animate ({width: "70%", Opacity:0.4,marginleft: "0.6in", FontSize: "3em"});
The second parameter is duration. It defines when to apply to an animation. It sets the value: "Slow", "fast", "normal" or milliseconds.
Example 1
<script type= "Text/javascript" >
$ (document). Ready (function () {
$ ("#start"). Click (function () {
$ ("#box"). Animate ({height:300}, "slow");
$ ("#box"). Animate ({width:300}, "slow");
$ ("#box"). Animate ({height:100}, "slow");
$ ("#box"). Animate ({width:100}, "slow");
});
});
</script>
Tiy
Example 2
<script type= "Text/javascript" >
$ (document). Ready (function () {JQuery contains a lot to change and manipulate H
$ ("#start"). Click (function () {Change HTML content
$ ("#box"). Animate ({left: "100px"}, "slow"); Grammar
$ ("#box"). Animate ({fontSize: "3em"}, "slow"); $ (selector). HTML (content)
}); The HTML () function changes the HTML element that matches
}); Instance
</script> $ ("P"). HTML ("W3school");
Tiy tiy
HTML elements are statically positioned by default and cannot be moved.
To make the element movable, set the CSS's position to relative or absolute.
Problems with JQuery animations
Many jQuery functions involve animations. These functions may use speed or duration as an optional parameter.
Example: $ ("P"). Hide ("slow")
The speed or duration parameter can set many different values, such as "slow", "fast", "normal", or milliseconds.
Instance
$ ("button"). Click (function () {
$ ("P"). Hide (1000);
});
Tiy
Because JavaScript statements (directives) are executed one-by-in-order, the statements after the animation may produce errors or page conflicts because the animation is not yet complete.
To avoid this situation, you can add the Callback function as a parameter.
JQuery Callback function
When animation 100% is complete, the Callback function is called.
A typical syntax:
$ (selector). Hide (Speed,callback)
The callback parameter is a function that is executed after the hide operation is completed.
Error (no callback)
$ ("P"). Hide (1000);
Alert ("The paragraph is now hidden");
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Correct (with callback)
$ ("P"). Hide (1000,function () {
Alert ("The paragraph is now hidden");
});
JQuery CSS Operations
JQuery has three important functions for working with CSS:
$ (selector). CSS (Name,value)
$ (selector). css ({properties})
$ (selector). CSS (name)
CSS Operation Example JQuery AJAX
The function css (name,value) sets the value for a given CSS property for all matching elements:
Instance Previous Page
$ (selector). CSS (name,value) Next Page
$ ("P"). CSS ("Background-color", "yellow");
Tiy JQuery has developed for AJAX
The function css ({properties}) also sets values for a series of CSS properties for all matching elements:
Example JQuery AJAX instance
$ (selector). css ({properties})
$ ("P"). css ({"Background-color": "Yellow", "font-size": "200%"}); Using AJAX to change text
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The function CSS (name) returns the value of the specified CSS property: Change Content
Instance
$ (selector). CSS (name) tiy
$ (this). CSS ("Background-color");
Tiy The above example is excerpted from our AJ
JQuery Size operation
JQuery has two important functions for size operation: What is AJAX?
$ (selector). Height (value)
$ (selector). Width (value) AJAX = Asynchronous Jav
Size Operation Instance
The function height (value) sets the height of all matching elements: AJAX is a way to create a fast dynamic
Instance
$ (selector). Height (value) AJAX through in the background with the server
$ ("#id100"). Height ("200px");
Tiy you can do in our AJAX tutorials
The function width (value) sets the widths of all matching elements:
Instance AJAX and JQuery
$ (selector). Width (value)
$ ("#id200"). Width ("300px"); JQuery provides for AJAX to open the
Tiy
jquery CSS functions-from this page through JQuery AJAX, using
CSS Property Description
$ (selector). CSS (Name,value
)
Set style properties for matching elements
And you can directly put the remote data
$ (selector). css ({properties}
)
Set multiple styles for matching elements
Property
$ (selector). CSS (name)
Get the first sample of a matching element
The value of the property is written less,
$ (selector). Height (value) sets the heights of the matching elements
$ (selector). Width (value) sets the widths of the matching elements the load function of JQuery is a
$ (selector). Load (Url,data,callbac
JQuery selector Use selectors to define what you want to change
Selector Instance Selection tiy
* $ ("*") all elements
#id $ ("#lastname")
Id=lastn
The meta of AME
Only if you want to send to the server
. Class $ (". Intro")
All
Class= "I
Ntro "of
Elements
Element $ ("P")
All <p>
Element Low Level AJAX
. Class.class $ (". Intro.demo")
All
Class=in
Tro and
Class=de
Mo's meta
Of
$.ajax (options) is a low-level
: First $ ("P:first")
First one
<p> elements
: Last $ ("P:last")
Last one
The <p> element $.ajax provides a higher level function than
: Even $ ("Tr:even")
All even
<tr> yuan
Of
: Odd $ ("tr:odd")
All odd
<tr> yuan
The option parameter is set by Nam
: EQ (Index) $ ("UL Li:eq (3)")
In the list
Fourth Yuan
Of
(Index
Open from 0
Start) tiy
: GT (NO) $ ("UL li:gt (3)")
List
Index Large
In 3 of
Elements
: LT (No) $ ("UL Li:lt (3)")
List
Index Small
In 3 of
Element JQuery AJAX Request
: Not (selector) $ ("Input:not (: Empty)")
All not for
The empty
INPUT element
Of
Request
: Header $ (": Header")
All titles
Elements
...
$ (SELECT
OR). Load
(Url,dat
A,callba
ck
: Animated
All animations
Elements
$.ajax (o
ptions)
$.get (Ur
L,data,c
Allback,
Type
: Contains (text)
$ (": Contains (' W3school
‘)")
Contain text
The All meta
Of
$.post (U
Rl,data,
Callback
, type)
: Empty $ (": Empty")
No Child (yuan
(Vegetarian) Node
The All meta
Of
$.getjso
N (Url,da
Ta,callb
Ack
: Hidden $ ("P:hidden")
All hidden
of <p>
Elements
$.getscr
IPT (URL,
Callback
)
: Visible $ ("table:visible")
All visible
The table
(selector) jQuery element selection
S1,S2,S3 $ ("Th,td,.intro")
All with
Match Selection
The Elements
(URL) The data that is loaded by UR
[Attribute] $ ("[href]")
All with
href Genus
The elements of sex
[Attribute=value] $ ("[href= ' # ']")
All
href Genus
The value of sex, etc.
In the "#"
The number of elements (data) sent to the server
[Attribute!=value] $ ("[href!= ' # ']")
All
href Genus
The value of the sex does not
equals "#"
The Elements
[Attribute$=value] $ ("[href$= '. jpg ']")
All
href Genus
The value of the sex package
Containing
". jpg"
Element (callback) when the data is loaded
: Input $ (": input")
All
<input>
The class of the data returned by the element (type)
: Text $ (": Text")
All
Type= "Te
XT "of
<input>
Elements
:p Assword $ (":p Assword")
All
Type= "PA
ssWOrd "
Of
<input>
Elements (options) complete AJAX request
: Radio $ (": Radio")
All
Type= "Ra
Dio "of
<input>
Elements
: CheckBox $ (": checkbox")
All
Type= "Ch
Eckbox "
Of
<input>
Elements
: Submit $ (": Submit")
All
Type= "Su
Bmit "of
<input>
Elements
: Reset $ (": Reset")
All
Type= "re
Set "of
<input>
Elements
: Button $ (": Button")
All
Type= "bu
Tton "of
<input>
Elements
: Image $ (": Image")
All
Type= "im
Age "of
<input>
Elements
: File $ (": File")
All
Type= "fi
Le "'s
<input>
Elements
: Enabled $ (": Enabled")
All activations
The input
Elements
:d isabled $ (":d isabled")
All disabled
The input
Elements
: Selected $ (": Selected")
All selected
Taken by
INPUT element
Of
: Checked $ (": Checked")
All selected
In the
INPUT element
Of
JQuery Event Method
An event method triggers an event that matches an element, or binds a function to an event of all matching elements.
Trigger instance:
$ ("Button#demo"). Click ()
The example above will trigger the Click event of the button element id= "demo".
Binding instances:
$ ("Button#demo"). Click (function () {$ ("img"). Hide ()})
The example above will hide all images when you click on the id= "demo" button.
Method description
Ready ()
Document Readiness Event (when HTML
When the document is ready to be available)
Blur ()
Triggers, or binds a function to a reference
Blur events for fixed elements
Change ()
Triggers, or binds a function to a reference
Change event for a fixed element
Click ()
Triggers, or binds a function to a reference
Click event for a fixed element
DblClick ()
Triggers, or binds a function to a reference
Double click of a fixed element
Event
Error ()
Triggers, or binds a function to a reference
Error event for a fixed element
Focus ()
Triggers, or binds a function to a reference
Focus event for a fixed element
KeyDown ()
Triggers, or binds a function to a reference
Key down event for a fixed element
KeyPress ()
Triggers, or binds a function to a reference
Key press thing for the fixed element
Thing
KeyUp ()
Triggers, or binds a function to a reference
Key up event for the fixed element
Load ()
Triggers, or binds a function to a reference
The Load event for the fixed element
MouseDown ()
Triggers, or binds a function to a reference
The mouse of the definite element
Thing
MouseEnter ()
Triggers, or binds a function to a reference
Mouse enter for the fixed element
Event
MouseLeave ()
Triggers, or binds a function to a reference
Mouse leave of definite elements
Event
MouseMove ()
Triggers, or binds a function to a reference
Mouse move thing of the definite element
Thing
Mouseout ()
Triggers, or binds a function to a reference
Mouse out of a definite element
Thing
MouseOver ()
Triggers, or binds a function to a reference
Mouse over the elements
Thing
MouseUp ()
Triggers, or binds a function to a reference
Mouse up event for a fixed element
Resize ()
Triggers, or binds a function to a reference
Resize events for fixed elements
Scroll ()
Triggers, or binds a function to a reference
Scroll events for fixed elements
Select ()
Triggers, or binds a function to a reference
Select event for a fixed element
Submit ()
Triggers, or binds a function to a reference
The submit event for the fixed element
Unload ()
Triggers, or binds a function to a reference
Unload events for fixed elements
Basic JQuery Instance
The following example shows the Hide () function of jQuery, which hides all the <p> elements in the HTML document.
<script type= "Text/javascript" src= "Jquery.js" ></script>
<script type= "Text/javascript" >
$ (document). Ready (function () {
$ ("button"). Click (function () {
$ ("P"). Hide (); Document-Ready functions
You may have noticed in our example that the
$ (document). Ready (function
---jQuery functions go he
});
<p>this is a paragraph.</p> below are two kinds if the document is shipped before it is fully loaded
<p>this is another paragraph.</p> tries to hide an element that does not exist.
<button type= "button" >click me</button> get the size of an image that is not fully loaded.
JQuery Selector
In the previous chapters, we showed some of the
The key point is that learning jQuery selectors is like
The JQuery element selector and the property selector allow
The selector allows you to set the HTML element or a single
In the HTML DOM terminology:
The selector allows you to set a DOM element or a single
JQuery element Selector
JQuery uses CSS selectors to select H
$ ("P") select the <p> element.
$ ("P.intro") Select all class= "int
$ ("P#demo") Select Id= "Demo"
To more about the selector syntax. JQuery Property Selector
JQuery uses an XPath expression to select
$ ("[href]") Select all with href
$ ("[href= ' # ']") Select all with HR
$ ("[href!= ' # ']") Select all with H
$ ("[href$= '. jpg ']") Select all HRE
JQuery CSS Selector
The JQuery CSS selector can be used to change the H
The following example puts the background of all P elements
Instance
Both hide () and show () can set two optional parameters: Speed and callback. $ ("P"). CSS ("Background-col
Tiy
$ (selector). Hide (Speed,callback) More instances
Grammar
$ (selector). Show (Speed,callback) $ (this)
The callback parameter is the name of the function that is executed after the hide or show function finishes. You will learn more about the callback parameters in the sections below in this tutorial. $ ("P")
The speed parameter can set these values: "Slow", "fast", "normal" or milliseconds:
$ ("P.intro
")
$ (". Intro"
)
$ ("button"). Click (function () {
$ ("#intro"
)
$ ("P"). Hide (1000);
$ ("ul
Li:first ")
$ ("[href$
= '. jpg '] ")
$ ("Div#int
Ro
. Head ")
For a complete reference manual, please visit
JQuery sliding Functions-Slidedown, Slideup, Slidetoggle
JQuery has the following sliding functions:
$ (selector). Slidedown (Speed,callback)
$ (selector). Slideup (Speed,callback)
$ (selector). Slidetoggle (Speed,callback)
The speed parameter can set these values: "Slow", "fast", "normal", or milliseconds.
The callback parameter is the name of the function that is executed after the hide or show function finishes. You will learn more about the callback parameter in the following chapters of this tutorial
Slidedown () instance
$ (". Flip"). Click (function () {
$ (". Panel"). Slidedown ();
});
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Slideup () instance
$ (". Flip"). Click (function () {
$ (". Panel"). Slideup ()
})
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Slidetoggle () instance
$ (". Flip"). Click (function () {
Learn more about the callback parameters. $ (". Panel"). Slidetoggle ();
});
Tiy
JQuery Fade Function-fadeIn (), FadeOut (), FadeTo ()
JQuery has the following fade functions:
$ (selector). FadeIn (Speed,callback)
$ (selector). FadeOut (Speed,callback)
$ (selector). FadeTo (Speed,opacity,callback)
The speed parameter can set these values: "Slow", "fast", "normal", or milliseconds.
The opacity parameter in the FadeTo () function weakens to the given opacity.
The callback parameter is the name of the function that is executed after the hide or show function finishes. You will learn more about the callback parameter in the following chapters of this tutorial
FadeTo () instance
$ ("button"). Click (function () {
$ ("div"). FadeTo ("slow", 0.25);
});
Tiy
FadeOut () instance
$ ("button"). Click (function () {
$ ("div"). FadeOut (4000);
});
JQuery effect-from this page
Function description
$ (selector). Hide () hides the selected element
$ (selector). Show () display selected elements
$ (selector). Toggle
()
Toggle (in the Hide and show
Selected elements)
$ (selector). slided
Own ()
Swipe down (show) selected element
Of
$ (selector). Slideu
P ()
Swipe up (hide) the selected element
Of
$ (selector). Slidet
Oggle ()
Toggles the selected element to slide up
and swipe down
$ (selector). FadeIn
() fade in selected element
$ (selector). Fadeo
UT () Fade out of selected elements
$ (selector). Fadet
O ()
Fades the selected element to the given
Opacity
$ (selector). Animat
E ()
Performs a custom action on the selected element
Draw
JQuery contains a lot of powerful functions for changing and manipulating HTML.
Change HTML Content
$ (selector). HTML (content)
The HTML () function changes the contents of the matching HTML element (InnerHTML).
$ ("P"). HTML ("W3school");
Add HTML Content
Grammar
$ (selector). Append (content)
The append () function appends content to the inside of the matching HTML element.
Grammar
$ (selector). prepend (content)
The prepend () function internally presets (prepend) content to the matching HTML element.
Instance
$ ("P"). Append ("W3school");
Because the animation is not yet complete. Tiy
Grammar
$ (selector). After (content)
The After () function inserts HTML content after all matching elements.
Grammar
$ (selector). Before (content)
The Before () function inserts HTML content before all matching elements.
Instance
$ ("P"). After ("W3school.");
Tiy
JQuery HTML Operations-from this page
Function description
$ (selector). HTML (c
ontent)
Change the selected element's (inside)
Html
$ (selector). Appen
D (content)
To the selected element (internal)
HTML Append Content
$ (selector). Prepe
nd (content)
To the selected element (internal)
HTML "Presets"
(prepend) content
$ (selector). After (c
ontent)
After the selected element is added
Html
$ (selector). Before
(content)
Add before the selected element
Html
(selector) jQuery element selector syntax
For a complete reference manual, please visit our jQuery HTML Operation reference Manual.
Previous Page
Next Page
JQuery AJAX functions
Previous Page
Next Page
JQuery has a rich library of functions (methods) for AJAX development.
JQuery AJAX Instance
Using AJAX to change text
Change Content
The above example is excerpted from our AJAX tutorials, but is modified using JQuery.
What is AJAX?
AJAX = asynchronous JavaScript and XML.
AJAX is a technique for creating fast, Dynamic Web pages.
AJAX allows Web pages to be updated asynchronously by exchanging small amounts of data in the background with the server. This means that it is possible to not overload the entire page
You can learn more about Ajax in our Ajax tutorials.
AJAX and JQuery
JQuery provides a rich library of functions (methods) for AJAX development.
With JQuery AJAX, you can request TXT, HTML, XML, or JSON from a remote server using HTTP Get and HTTP Post.
And you can load the remote data directly into the selected HTML element of the Web page!
Write less and do more
The load function of JQuery is a simple (but very powerful) AJAX function. Its syntax is as follows:
$ (selector). Load (Url,data,callback)
Use the selector to define the HTML element you want to change, and use the URL parameter to specify the Web address of your data.
You need to use the data parameter only if you want to send the information to the server. Only if you need to trigger a function after completion, do you need to make
Low Level AJAX
The $.ajax (options) is the syntax for low-level AJAX functions.
$.ajax provides more functionality than high-level functions, but it is also more difficult to use.
The option parameter sets the Name|value pair, which defines the URL data, password, data type, filter, character set, timeout, and error functions.
JQuery AJAX Request
Describe
The remote number
It is loaded into
The selected meta
Sozhong
The remote number
It is loaded into
Xmlhttpr
Equest
Object in
Use
HTTP GET
To load the far
Process data
Use
HTTP
POST to
Load Remote
Data
Use
HTTP GET
To load the far
Process JSON
Data
Load and
Line-Remote
Javascri
PT file
(selector) jQuery element selector syntax
(URL) The URL of the data being loaded (address)
(data) The key/value object that is sent to the server
(callback) The function that is executed when the data is loaded
Type (html,xml,json,jasonp,script,text) of the data being returned (type)
(options) all key/value pairs options for complete AJAX requests
JQuery Event Handling methods
The event handling method binds the event handler to the matching element.
Method Trigger
$ (selector). bind
(event)
Add one or more to the matching element
Multi-Event Processor
$ (selector). Dele
Gate (selector,
Event
Add an event to a matching element
Processor, now or in the future
$ (selector). Die (
)
Remove all through Live () letters
Number of added event handlers
$ (selector). Live
(event)
Add an event to a matching element
Processor, now or in the future
$ (selector). One (
Event
Add an event to a matching element
Processor. The processor can only touch
Sent once.
$ (selector). Unbi
ND (Event)
Removes a add from the matching element
Add the event handler
$ (selector). Unde
Legate (event)
Removes a add from the matching element
Add the event handler, now or
Future
$ (selector). Trig
GER (event) The specified event for all matching elements
$ (selector). Trig
Gerhandler (Event
)
The first specified by a matched element
Event
Add a jQuery library to your page
The jquery library is located in a single JavaScript file that contains all of the jquery functions.
JQuery can be added to a Web page with the following markup:
<script type= "Text/javascript" src= "Jquery.js" ></script>
Please note that the,<script> label should be located in the Document-Ready functions
You may have noticed that all jQuery functions in our instance are in a document ready function:
$ (document). Ready (function () {
---jQuery functions go here----
This is to prevent the document from running JQuery code before it is fully loaded (ready).
Here are two scenarios in which the operation fails if the document is run before it is fully loaded:
An attempt was made to hide an element that does not exist.
Gets the size of an image that is not fully loaded.
JQuery Selector
In the previous chapters, we showed some examples of how to select HTML elements.
The key point is to learn how the JQuery selector accurately selects the elements that you want to apply the effect to.
The JQuery element selector and the property selector allow you to select HTML elements by tag name, property name, or content.
Selectors allow you to manipulate HTML element groups or individual elements.
In the HTML DOM terminology:
Selectors allow you to manipulate a group of DOM elements or a single DOM node.
JQuery element Selector
JQuery uses CSS selectors to select HTML elements.
$ ("P") select the <p> element.
$ ("P.intro") selects all the <p> elements of the class= "Intro".
$ ("P#demo") Select the first <p> element of id= "demo".
JQuery Property Selector
JQuery uses an XPath expression to select an element with a given property.
$ ("[href]") selects all elements with an href attribute.
$ ("[href= ' # ']") selects all elements with an HREF value equal to "#".
$ ("[href!= ' # ']") selects all elements with an HREF value that is not equal to "#".
$ ("[href$= '. jpg ']") selects all elements with an href value ending with ". jpg".
JQuery CSS Selector
The JQuery CSS selector can be used to change the CSS properties of HTML elements.
The following example changes the background color of all p elements to red:
$ ("P"). CSS ("Background-color", "Red");
More examples
Describe
Current
HTML Meta
Of
All <p>
Elements
All
Class= "in
Tro "of
<p> elements
All
Class= "in
Tro "of the yuan
Of
Id= "Intro"
The first
Elements
Each
<ul> 's
First one
<li> elements
All with
with ". jpg"
End of
HREF attribute
of the properties
Id= "Intro"
of <div>
Element in the
All
Class= "H
EAD "of
Elements
For a complete reference manual, please visit our JQuery selector reference manual.
Section to learn more about the callback parameters.
Section to learn more about the callback parameters.
It is possible to update part of a Web page without overloading the entire page.
, HTML, XML, or JSON.
You need to use the callback parameter when triggering a function.
Character sets, timeouts, and error functions.
jquery Help Documentation
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