jquery Ajax asynchronous request receive return JSON data

Example

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$ (' #send '). Click (function () { $.ajax ({ Type: "Get", URL: "a.php", DataType: "Jsonp", Success:function (data) { $.each (Data.items, function (I, item) { $ ("if (i = = 3) { return false; } }); } }); });

$.ajax methods such as

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$.ajax ({    type: "POST",    url:   ctxroot+ ' folderaction!saveinformsetting.action ',    data: ' jsonstr= ' + inform_ Settingliststr,    datatype: "JSON",    complete:function (data) {        //doing something here, assuming that the returned JSON data has the name attribute       // Sometimes you can directly data.name or data[' name ' to access the       //But sometimes you have to go through the var jsondata = eval ("+ data.responsetext+ ")") before it can be accessed through jsondata.name, and in this case, it needs to be complete instead of success        }); $.ajax (options)

It is the most fundamental jquery Ajax method, which has only one parameter options, which contains information about the request information and the callback function. The parameter contents are key:value and are optional.

Grammar:
$.ajax ({options});
URL: (string) to send the requested address, either a server page or a WebService action.
Type: (string) Request method, post or get
Data: (object) When sending a request to the server. is a key:value pair form, such as: {name: "Grayworm", Sex: "Male"}, if it is an array {works:["Work1", "Work2"]}
DataType: (string) The data type expected to be returned. Xml,html,json,text, etc.
Beforesend: (Function) is triggered before an AJAX request is sent, and if returned false cancels the request. If an asynchronous request needs to display a GIF animation, you should set the corresponding visible here.