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This article mainly introduces the relevant knowledge of "what is the use of data parameters in ajax ()". The editor shows you the operation process through an actual case. The operation method is simple, fast and practical. I hope this article "what is the use of data parameters in ajax ()" can help you solve the problem.

In ajax, data means "data". This parameter is used to specify the data to be sent to the server and is automatically converted to the request string format; in the case of a GET request, the data to be sent 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 execute an AJAX (asynchronous HTTP) request.

All jQuery AJAX methods use the ajax () method. This method is usually 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 following table:

Name value / description async Boolean value indicating whether the request is processed asynchronously. The default is true. BeforeSend (xhr) the function that runs before sending the request. A cache Boolean value indicating whether the browser caches the requested page. The default is true. Complete (xhr,status) the function that runs when the request is completed (called after the successful or failed request, that is, after the success and error functions).

The type of content that contentType uses to send data to the server. The default is "application/x-www-form-urlencoded". Context specifies a "this" value for all AJAX-related callback functions. Data specifies the data to be sent to the server. Will be automatically converted to the request string format. The GET request will be appended to the URL. Check the description of the processData option to disable this automatic conversion. Must be in Key/Value format. If it is an array, jQuery automatically corresponds to the same name for different values. For example, {foo: ["bar1", "bar2"]} is converted to'& foo=bar1&foo=bar2'. DataFilter (data,type) is a function used to process XMLHttpRequest raw response data. The data type of the server response expected by dataType. Error (xhr,status,error) the function to run if the request fails. A global Boolean value that specifies whether the global AJAX event handler is triggered for the request. The default is true.

An ifModified Boolean value that specifies whether the request succeeds only if the response has changed since the last request. The default is false. Jsonp rewrites the string of the callback function in a jsonp. JsonpCallback specifies the name of the callback function in a jsonp. Password specifies the password to be used in HTTP access authentication requests. A processData Boolean value that specifies whether the data sent through the request is converted to a query string. The default is true. ScriptCharset specifies the requested character set. Success (result,status,xhr) the function to run when the request is successful. Timeout sets the local request timeout in milliseconds. A traditional Boolean value that specifies whether to use the traditional style of parameter serialization. Type specifies the type of request (GET or POST). The url specifies the URL on which the request is sent. The default is the current page.

Username specifies the user name to be used in HTTP access authentication requests. The function used by xhr to create a XMLHttpRequest object. This is the end of the content about "what is the use of the data parameter in ajax ()". Thank you for reading. If you want to know more about the industry, you can follow the industry information channel. The editor will update different knowledge points for you every day.

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