How JsonP media type formatter actually works?

Sachin Singh

JsonP wraps json data into a function , browser allows script to load from other domain so cross origin request is possible with jsonp.

However, without any Callback defined , how are we able to get Json data back in Ajax Success.

function getEmployeeById() {
$.ajax({
"type": "get",
"url": myUrl,
"data":{Id:id},
"dataType": "Jsonp",
"cache": false,
"success": function (data) {
},
})
}

Obvioulsy , web API would be sending jsonp formatted data otherwise browser would not allow it , My question is, i have not defined any callback function to get Jsonp data and Success function is getting json object, how is the whole process working?

It seems as if web api is sending plain Json object without wrapping it in function , how?

2 Replies

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Sachin Singh6y ago
@Farhan , do you even read the question, its conceptual not technical , i am not asking how to use Jsonp rather when Jsonp formatter wraps the json obj into function, then i should have used any Callback function like
Jsonp:myCallback (here the Jsonp formatter should also contain the callback function name , isn't it?)
function mycallback(data){
var id=data.Id ;
------
------
}

but when i am not specifying any such function then how am i able to get json data successfully. who is doing the mapping behind the scene or web api simply sending Json object without wrapping it in function , then how browser is allowing it???
Farhan Ahmed6y ago
visit this below link

https://dotnettutorials.net/lesson/cross-domain-using-jquery-ajax/