How to Use ajax to call json data in jquery

$. Get () and $. post () methods are basically the same, so only $. post () is used!
Scenario 1: $. post ("url", function); The returned data is not processed, so it is not in json format!
Scenario 2: $. post ("url", function, "json"); although the returned data is specified in json format, it is not actually!
Case 3: $. post ("url", {}, function); the input parameter is null and the returned data format is not specified, so it is not in json format!
Scenario 4: $. post ("url", {}, function, "json"); The json format data is returned correctly!
Key point: to process the returned data in json format, you must input a parameter (the parameter is written as {} if it is null) and specify the return type as "json "!
$. Ajax ({
Url: "url ",
DataType: "json ",
Type: "get"
Success: function
})
Key Point: To specify dataType as "json", both get and post methods will get json data. However, we recommend that you add data to the above two methods to ensure consistency:.
$. GetJSON ("url", function)
Key Point: get data in json format. It is convenient to write $. get!