Jquery.ajax various parameters and property settings

Source: Internet
Author: User
Tags browser cache

$.ajax ({
Type: "Post",
DataType: ' HTML ',
Success:function (data) {},
Complete:function (XMLHttpRequest, Textstatus) {},
Error:function () {}

success: The function that is called when the request succeeds. This function will get a parameter: The data returned from the server. The function is called when the request succeeds, that is, status==200.
Complete : The function that is called when the request completes. This function gets two arguments: The XMLHttpRequest object and a string that describes the type of the request success. The function is called when the request is complete, that is, status==404, 403, 302 ....

So, when writing a success or complete method, pay attention to the parameters passed in, and use the passed in Parameter object to solve our problem

Parameter list:

Name of parameter Type Describe
Url String (Default: Current page address) sends the requested address.
Type String (Default: "Get") The Request method ("POST" or "get"), the default is "get". Note: Other HTTP request methods, such as PUT and DELETE, can also be used, but only some browsers support it.
Timeout Number Sets the request time-out (in milliseconds). This setting overrides the global settings.
Async Boolean (default: TRUE) by default, all requests are asynchronous requests. If you need to send a synchronization request, set this option to false. Note that the sync request will lock the browser, and the user's other actions must wait for the request to complete before it can be executed.
Beforesend Function You can modify the functions of the XMLHttpRequest object before sending the request, such as adding a custom HTTP header. The XMLHttpRequest object is the only parameter.
function (XMLHttpRequest) {This         //The options for this AJAX request         }
Cache Boolean (default: TRUE) JQuery 1.2 new feature, set to False will not load the request information from the browser cache.
Complete Function The callback function after the request completes (called when the request succeeds or fails). Parameters: XMLHttpRequest Object, Success information string.
function (XMLHttpRequest, Textstatus) {This         //The options for this AJAX request         }
ContentType String (Default: "application/x-www-form-urlencoded") the content encoding type when sending information to the server. The default values are suitable for most applications.
Data Object,
Data sent to the server. is automatically converted to the request string format. The GET request will be appended to the URL. View the ProcessData option description to disallow this automatic conversion. Must be a key/value format. If an array, JQuery automatically corresponds to the same name for the different values. such as {foo:["bar1", "Bar2"]} converted to ' &foo=bar1&foo=bar2 '.
dataType string

Expected data type returned by the server. If you do not specify,jquery  will automatically return Responsexml or responsetext based on the HTTP packet MIME information and pass as a callback function parameter, the available value:

"xml": Returns an XML document, available   jquery  processing.

HTML: Returns plain text HTML information, including the script element.

"Script": Returns plain text  JavaScript  code. Results are not automatically cached.

"JSON": Returns the JSON data. The

"JSONP": jsonp  format. When calling functions using  JSONP , such as "myurl?callback=?" JQuery is automatically replaced? is the correct function name to execute the callback function.

Error Function (Default: This method is called when a request for automatic judgment (XML or HTML) fails.) This method has three parameters: the XMLHttpRequest object, the error message, and (possibly) the error object being captured.
function (XMLHttpRequest, Textstatus, Errorthrown) {this//the options for this                  ajax request         }
Global Boolean (default: TRUE) whether to trigger global AJAX events. Setting to FALSE will not trigger global AJAX events, such as Ajaxstart or Ajaxstop. Can be used to control different AJAX events
Ifmodified Boolean (default: false) to get new data only when the server data changes. Use the HTTP packet last-modified header information to determine.
ProcessData Boolean (default: TRUE) by default, the sent data is converted to an object (technically not a string) to match the default content type "application/x-www-form-urlencoded". Set to False if you want to send DOM tree information or other information that you do not want to convert.
Success Function The callback function after the request succeeds. This method has two parameters: the server returns data, returns the status
function (Data, Textstatus) {         //data could be xmldoc, jsonobj, HTML, text, etc ...          This //The options for this AJAX request         }

Jquery.ajax various parameters and property settings

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