The jQuery get() and post() methods are used to request data from the server
with an HTTP GET
or POST request.
HTTP Request: GET vs. POST
Two commonly used methods for a request-response between a client and server
are: GET and
POST.
- GET - Requests data from a specified resource
- POST - Submits data to be processed to a specified resource
GET is basically used for just getting (retrieving) some data from the server.
Note: The GET method may return cached data.
POST can also be used to get some data from the server. However, the POST
method NEVER caches data, and is often used to send data along with the request.
To learn more about GET and POST, and the differences between the two
methods, please read our
HTTP Methods GET vs
POST chapter.
jQuery $.get() Method
The $.get() method requests data from the server with an HTTP GET request.
Syntax:
The required URL parameter specifies the URL you wish to request.
The optional callback parameter is the name of a function to be executed
if the request succeeds.
The following example uses the $.get() method to retrieve data from a file on
the server:
Example
$("button").click(function(){
$.get("demo_test.asp",function(data,status){
alert("Data: " + data + "\nStatus: " + status);
});
});
Try it yourself »
The first parameter of $.get() is the URL we wish to request ("demo_test.asp").
The second
parameter is a callback function. The first callback parameter holds the content of
the page requested, and the second callback parameter holds the status of
the request.
Tip: Here is how the ASP file looks like ("demo_test.asp"):
<%
response.write("This is some text from an external ASP file.")
%>
jQuery $.post() Method
The $.post() method requests data from the server using an HTTP POST request.
Syntax:
$.post(URL,data,callback);
The required URL parameter specifies the URL you wish to request.
The optional data parameter specifies some data to send along with the
request.
The optional callback parameter is the name of a function to be executed
if the request succeeds.
The following example uses the $.post() method to send some data along with the
request:
Example
$("button").click(function(){
$.post("demo_test_post.asp",
{
name:"Donald Duck",
city:"Duckburg"
},
function(data,status){
alert("Data: " + data + "\nStatus: " + status);
});
});
Try it yourself »
The first parameter of $.post() is the URL we wish to request ("demo_test_post.asp").
Then we pass in some data to send along with the request (name and city).
The ASP script in "demo_test_post.asp" reads the parameters,
processes them, and returns a result.
The third
parameter is a callback function. The first callback parameter holds the content of
the page requested, and the second callback parameter holds the status of
the request.
Tip: Here is how the ASP file looks like ("demo_test_post.asp"):
<%
dim fname,city
fname=Request.Form("name")
city=Request.Form("city")
Response.Write("Dear " & fname & ". ")
Response.Write("Hope you live well in " & city & ".")
%>
jQuery AJAX Reference
For a complete overview of all jQuery AJAX methods, please go to our
jQuery
AJAX Reference.
