The difference between ContentType and datatype in AJAX requests

ContentType:

(Default: "application/x-www-form-urlencoded") the content encoding type when sending information to the server. The default value is appropriate for most cases. If you explicitly pass a content-type to $.ajax () then he will certainly send it to the server (even if there is no data to send).

Other optional types are: Form-data x-www-form-orlencoded raw binary, etc.

DataType:

Expected data type returned by the server. If not specified, JQuery is automatically judged intelligently based on the HTTP packet mime information, such as the XML MIME type being recognized as XML. In 1.4, JSON generates a JavaScript object, and script executes it. The data returned by the server is then parsed against this value and passed to the callback function. Available values:

"XML": Returns an XML document that can be processed with jQuery.

HTML: Returns plain text HTML information, and the included script tag is executed when the DOM is inserted.

"Script": Returns plain text JavaScript code. Results are not automatically cached. Unless the "cache" parameter is set. "Note:" On a remote request (not in the same domain), all post requests are converted to get requests. (because the script tag of the DOM will be used to load)

"JSON": Returns the JSON data.

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

"Text": Returns a plain text string

The difference between ContentType and datatype in AJAX requests