javascript - A strange error occurred when using ajax to handle get cross-domain. .

Question

Only $.ajax is shown here. In fact, I have also used $.get and $.getJSON to get the data, but a common error was reported! ! !
The data can be obtained!!

Answer 1

The format of

json is: {"a":"123"}
jsonp的格式是：callback({"a":"123"});
所以，会报那个意外的字符:.

Answer 2

The requested address is not the returned jsonp data.

Answer 3

First you have to determine whether the parameter passed in is an object or a json string, and then see if your analysis is correct