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JSON issue with jQuery (JSONP)

I have a strange issue using jQuery and JSON, especially JSONP.
My goal is to simply GET JSON data, but I always end up with the following error:
Uncaught SyntaxError: Unexpected token
Here is the code:
<script type="text/javascript">
$(document).ready(function() {
var myurl = "someurl";
$.ajax({
url: myurl,
method: 'GET',
contentType: 'application/javascript',
dataType : 'jsonp',
success: function(result){
//Do something with JSON result
}
});
</script>
And of course the JSON (raw format):
{"result":[{"targetView":"powerUsage","myData":{"someItems":["9","5","8"],"someItems2":[{"text":"protoText","currentRecord":"45.38","absolute":100}]}}]}
I tried the webservice with the Advanced Rest Client App in Google Chrome and it is working perfectly. I have no clue why this simple example gets this syntax error message.

Your Ajax code looks like fine. I think you are trying to make a Cross domain call as JSONP is a hack for dealing cross domain ajax call. If you Server code if ready for dealing with JSONP request then you must have send a callback parameter like
?callback=my_callback_method
than you service will return result with a callback see below links for more details:
https://learn.jquery.com/ajax/working-with-jsonp/
http://stackoverflow.com/questions/11736431/make-cross-domain-ajax-jsonp-request-with-jquery

You missed to put ready function close, that is }); at the last before script tag close:
<script type="text/javascript">
$(document).ready(function()
{
var myurl = "someurl";
$.ajax(
{
url: myurl,
method: 'GET',
contentType: 'application/javascript',
dataType: 'jsonp',
success: function(result)
{
//Do something with JSON result
}
});
});
</script>

Cross Domain Ajax get Request

I'd like to ask a question for cross-domain Get request via Ajax.
My ajax request is Like that
var currency_path="http://forex.cbm.gov.mm/api/latest";
$.ajax({
url: currency_path,
crossDomain:true,
type:"GET",
dataType:'jsonp',
async:false,
success: function(data){
console.log(data);
},
error: function(){
alert('failure');
}
}).done(function(msg) {
console.log(msg);
});
I got the response but i can't trace that
Any Suggestion ?

Look in your JavaScript error console:
Uncaught SyntaxError: Unexpected token :
You have dataType:'jsonp', but the URL is returning JSON.
You can't parse JSON as JSONP, there are different data formats.
Use some other technique to access the data.

JSONP via getJson not working?

I have getJson like this:
$.getJSON(userUrl+'scanp?callback=?', { 'someparametar': 100 }, function(data){
console.log(data);
});
and I do get a response from my url, and it looks like this:
'"jQuery1110010384737118147314_1401820556204({'hasWon':'false','code':'120580e9fce67a4921f31af7ffa358cc10c83b10','defaultReward':'{\"secure_url\":\"https://res.cloudinary.com/deh0vdgzd/image/upload/v1401318096/k6jrm2pehwycmehrkicz.png\",\"url\":\"http://res.cloudinary.com/deh0vdgzd/image/upload/v1401318096/k6jrm2pehwycmehrkicz.png\",\"resource_type\":\"image\",\"format\":\"png\",\"height\":960,\"width\":640,\"signature\":\"a8ca9bb867e0a3d99e1666b7891e8f918d81e627\",\"version\":1401318096,\"public_id\":\"k6jrm2pehwycmehrkicz\"}''}"'
Any idea why I don't get any response when I console.log it?

With 'callback' in your querystring, JQuery wraps the response with a randomly generated method name. To get JSON (without method name), remove 'callback=?' from querystring.
If your server supports JSONP, you can make a call like this :
$.ajax({
type: 'GET',
url: url,
jsonpCallback: 'jsonCallback',
contentType: "application/json",
dataType: 'jsonp',
success: function(json) {
console.log(JSON.stringify(json));
},
error: function(e) {
console.log(e.message);
}
});
Hope this helps.

Well I figured it out, the request I wrote was perfectly fine. The thing that was causing the the problem was response I was getting from server.
It was JSON stringified before return.

SyntaxError: missing ; before statement jquery jsonp

I am using below code to access rest service hosted on another domain.
$.ajax({
type: 'GET',
url: url,
async: false,
jsonpCallback: 'jsonCallback',
contentType: "application/json",
dataType:"jsonp",
success: function(json) {
alert(json);
},
error: function(e) {
console.log(e.message);
}
});
I am able to get the data correctly, but I get this error in firebug in mozilla:
SyntaxError: missing ; before statement
{"Hello":"World"}
Can anyone suggest me what I am doing wrong here? Even though Json data is valid. I tried all the suggestions posted in this question But still I am getting same error.

If it's really JSON you ask for, don't set "jsonp" as dataType, and don't provide a callback :
$.ajax({
type: 'GET',
url: url,
contentType: "application/json",
success: function(json) {
alert(json);
},
error: function(e) {
console.log(e.message);
}
});

the format of JSON and JSONP are slightæy different
JKSONP is a function invocation expression
callback({"hellow":"world"});
whereas JSON is simply a serialized object
{"Hello":"world"}
fromyour posting it would seem that the server is returning JSON and not JSONP
So you either need to change the server to reply correctly (The actual callback name is a get parameter to the request). You should do this if you are using the ajax call across domains
If you are not using ajax across domains stick to regular JSON

JSON data not responding

Following is my code :
function jsonpCallback(response){
//JSON.stringify(response)
alert(response);
}
$.ajax({
url: url,
dataType: 'jsonp',
error: function(xhr, status, error) {
alert(error);
},
success: function(data) {
alert(data);
jsonpCallback(data);
}
});
Here my url variable is the link which contain the following data and as per I know it is in the JSON format:
[{"destination":"United States","destinationId":"46EA10FA8E00","city":"LosAngeles","state":"California","country":"United States"}] etc..
I want to call jsonpCallback function after passing successive data to it. But success argument of $.ajax is not calling the function thats why I am not getting any data into it. But my debugger window showing response there, so why its not coming $.ajax function?
Any help...thanks in advance.

Try to pass type of ajax call GET/POST.
$.ajax({
type: "GET",
url: url,
dataType: 'jsonp',
error: function(xhr, status, error) { alert(error); },
success: function(data) {
alert(data);
jsonpCallback(data);
}
});
function jsonpCallback(response){
//JSON.stringify(response)
alert(response);
}

The URL you are trying to load data from doesn't support JSONP, which is why the callback isn't being called.
If you own the endpoint, make sure you handle the callback GET parameter. In PHP, your output would look like this:
<?php
echo $_GET['callback'].'('.json_encode($x).')';
This will transform the result to look like this:
jsonp2891037589102([{"destination":"United States","destinationId":"46EA10FA8E00","city":"LosAngeles","state":"California","country":"United States"}])
Of course the callback name will change depending on what jQuery generates automatically.
This is required as JSONP works by creating a new <script> tag in the <head> to force the browser to load the data. If the callback GET parameter isn't handled (and the URL returns a JSON response instead of a JSONP response), the data gets loaded yes, but isn't assigned to anything nor transferred (via a callback) to anything. Essentially, the data gets lost.
Without modifying the endpoint, you will not be able to load the data from that URL.

One weird thing I've noticed about $.ajax is that if the content-type doesn't match exactly it's not considered a success. Try playing around with that. If you change success to complete (and fix the arguments) does it alert?

It's not working because your server does not render a JSONP response. It renders a JSON response.
For JSONP to work, the server must call a javascript function sent by the ajax request. The function is generated by jQuery so you don't have to worry about it.
The server has to worry about it, though. By default, this function's name is passed in the callback argument. For example, the URL to the server will be http://some.domain/ajax.php?callback=functionName (notice callback=functionName).
So you need to implement something like the following on the server side (here in PHP):
$callback = $_GET['callback'];
// Process the datas, bla bla bla
// And display the function that will be called
echo $callback, '(', $datas, ');';
The page returned will be executed in javascript, so the function will be called, so jQuery will call the success function.

First check in which event you are calling $.ajax function...
<script type='text/javascript'>
jQuery('#EnrollmentRoleId').change(function(){
alert("ajax is fired");
$.ajax({
type: "GET",
url: url,
dataType: 'jsonp',
error: function(xhr, status, error) { alert(error); },
success: function(data) {
alert(data);
jsonpCallback(data);
}
});
});
function jsonpCallback(response){
//JSON.stringify(response)
alert(response);
}
</script>
second try to replace $ with jQuery.
Try to give no conflict if you thinking any conflict error..
jQuery ajax error callback not firing
function doJsonp()
{
alert("come to ajax");
$.ajax({
url: url,
dataType: "jsonp",
crossDomain: true,
jsonpCallback:'blah',
success: function() { console.log("success"); },
error: function() { console.log("error"); }
});
}
Then check your json data if it is coming it is valid or not..
Thanks