What does the data parameter in ajax() mean?

In ajax, data means "data". This parameter is used to specify the data to be sent to the server. The data will be automatically converted into the request string format; if it is a GET request, it will be sent. Data is appended to the URL.

The operating environment of this tutorial: windows7 system, jquery1.10.2 version, Dell G3 computer.

The ajax() method is used to perform AJAX (asynchronous HTTP) requests.

All jQuery AJAX methods use the ajax() method. This method is typically used for requests that cannot be completed by other methods.

Syntax:

$.ajax({name:value, name:value, ... })

This parameter specifies one or more name/value pairs for the AJAX request.

Possible names/values ​​are listed in the table below:

Name	Value/Description
async	Boolean value indicating whether the request is processed asynchronously. The default is true.
beforeSend(xhr)	Function to run before sending the request.
cache	Boolean value indicating whether the browser caches the requested page. The default is true.
complete(xhr,status)	Function that runs when the request is completed (called after the request succeeds or fails, that is, after success and error function).
contentType	The content type used when sending data to the server. The default is: "application/x-www-form-urlencoded".
context	Specifies the "this" value for all AJAX-related callback functions.
data	Specifies the data to be sent to the server. Will be automatically converted to request string format. Appended to the URL in GET requests. See the processData option description to disable this automatic conversion. Must be in Key/Value format. If it is an array, jQuery will automatically assign the same name to different values. For example, {foo:["bar1", "bar2"]} is converted to '&foo=bar1&foo=bar2'.
dataFilter(data,type)	Function used to process XMLHttpRequest raw response data.
dataType	The expected data type of the server response.
error(xhr,status,error)	Function to run if the request fails.
global	Boolean value that specifies whether the global AJAX event handler should be triggered for the request. The default is true.
ifModified	Boolean value that specifies whether the request succeeds only if the response has changed since the last request. The default is false.
jsonp	Rewrite the string of the callback function in a jsonp.
jsonpCallback	Specifies the name of the callback function in a jsonp.
password	Specifies the password used in HTTP access authentication requests.
processData	Boolean value that specifies whether the data sent through the request is converted into a query string. The default is true.
scriptCharset	Specifies the requested character set.
success(result,status,xhr)	Function that runs when the request succeeds.
timeout	Set the local request timeout (in milliseconds).
traditional	Boolean value that specifies whether to use the traditional style of parameter serialization.
type	Specifies the type of request (GET or POST).
url	Specifies the URL to send the request. The default is the current page.
username	Specifies the username used in HTTP access authentication requests.
xhr	Function used to create XMLHttpRequest objects.

[Related tutorial recommendations: AJAX video tutorial]

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