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Uncaught SyntaxError: Unexpected token u with Ajax post

I am stumped as to how to solve/diagnose ajax/jquery error.
This is my function:
var LogIn = {
Email: $("#Name").val(),
MobileNo: $("#txtMobileNumber").val(),
PinCode: '',
Message: '',
Success:false
};
$.ajax({
type: "POST",
crossDomain: true,
dataType: 'jsonp',
contentType: "application/json",
url: "https://a different server domain/api/LoginRequest",
data: JSON.stringify(LogIn),
success: function (data) {
$("#divError").html(data);
},
error: function (error) {
jsonValue = jQuery.parseJSON(error.responseText);
$("#divError").html(jsonValue);
}
});
I get this error:

jQuery doesn't support using POST and jsonp and the reason for that is very simple: when you inject a <script> tag into the DOM (which is what jQuery does when you use jsonp), the browser will send a GET request to the remote endpoint which has been referred to in the src property of this tag.
So basically you will need to use GET instead:
type: "GET"
Also since the data is sent as query string parameters you should remove the content type:
contentType: "application/json",
and do not JSON.stringify the data.
And here's the full example:
$.ajax({
type: "GET",
crossDomain: true,
dataType: 'jsonp',
url: "https://a different server domain/api/LoginRequest",
data: LogIn,
success: function (data) {
$("#divError").html(data);
},
error: function (error) {
jsonValue = jQuery.parseJSON(error.responseText);
$("#divError").html(jsonValue);
}
});
Of course this will work only if the remote endpoint supports JSONP and the GET verb.
Personally I would recommend using CORS instead of JSONP as it would give you much more options. You will be able to use POST in this case. Please refer to the following material as it seems you are using ASP.NET Web API on the server and trying to make a cross domain AJAX call: http://www.asp.net/web-api/overview/security/enabling-cross-origin-requests-in-web-api

Ajax request not working when a function is added to the success option

I am having trouble getting an ajax GET request (or any request for that matter) to retrieve the response. I am simply trying to return the response in an alert event:
<script>
$(document).ready(function() {
$('#test').click(function() {
$.ajax ({
type: 'Get',
url: 'https://crm.zoho.com/crm/private/json/Potentials/searchRecords?authtoken=XXX&scope=crmapi&criteria=(((Potential Email:test#email.com))&selectColumns=Potentials(Potential Name)&fromIndex=1&toIndex=1',
dataType: 'json',
success: function(data) {
alert(data);
}
});
});
});
</script>
I can get this and other similar post requests to work by taking away the function in the success option and editing the code like this:
<script>
$(document).ready(function() {
$('#test').click(function() {
$.ajax ({
type: 'Get',
url: 'https://crm.zoho.com/crm/private/json/Potentials/searchRecords?authtoken=XXXX&scope=crmapi&criteria=(((Potential Email:test#email.com))&selectColumns=Potentials(Potential Name)&fromIndex=1&toIndex=1',
dataType: 'json',
success: alert('success')
});
});
});
</script>
Why is this? And more importantly, how can I retrieve the response data and transfer it to an alert message? Any help is appreciated!
** Update:
Upon reading the first two users' responses on this question, this is what I have:
<script>
$(document).ready(function() {
$('#test').click(function() {
$.ajax ({
type: 'GET',
url: 'https://crm.zoho.com/crm/private/json/Potentials/searchRecords?authtoken=418431ea64141079860d96c85ee41916&scope=crmapi&criteria=(((Potential%20Email:test#email.com))&selectColumns=Potentials(Potential%20Name)&fromIndex=1&toIndex=1',
dataType: 'json',
success: function(data) {
alert(JSON.stringify(data));
},
error: function(data) {
alert(JSON.stringify(data));
}
});
});
});
</script>
I am able to get the error response, so I can confirm there is some kind of error. I also want to point out that I am making the request from a different domain (not crm.zoho.com) so should I be using jsonp? If so, how would I alter the code?

When you have
success: alert('success')
you do NOT have a successful request, you are actually executing this function at the start of AJAX method. The success parameter requires a pointer to a function, and when you use alert('success') you are executing a function instead of providing a pointer to it.
First thing that you need to try is to update type to GET instead of Get:
$.ajax ({
type: 'GET',

Try using the .done() function as follows:
<script>
$(document).ready(function() {
$('#test').click(function() {
$.ajax ({
type: 'Get',
url: 'yourUrl',
dataType: 'json',
}
}).done(function(result) {alert(data);}) //try adding:
.error(function(jqXHR, textStatus, errorThrown) {
console.log(textStatus, errorThrown);})
});
});
the error function will also give you some information in your console as to the status of your request.

Cannot do a post with jquery with json in body

With Chrome REST service I do this: a post to a certain url, I send a json string in the body, I set the content type as application/json and when I execute the post I get the proper answer.
I am trying to do the same post with jquery.
I first try with:
var beacon = {"beaconid.minor":2,"beaconid.UUID":"beaconnr","beaconid.major":1};
$.ajax({
type: "post",
data: JSON.stringify(beacon),
contentType: "application/json",
dataType: "jsonp",
crossDomain: true,
url: "myurl"}).done(function() {
alert("success");
}).fail(function()
{
alert("error");
});
by I seem to get no answer, I don't get the success alert nor the error alert.
I have then tried with:
var jqxhr = $.post( "myurl", {"beaconid.minor":2,"beaconid.UUID":"beaconnr","beaconid.major":1}).done(function(data, textStatus, jqXHR)
{
}).fail(function(jqXHR, textStatus, errorThrown)
{
alert(textStatus);
});
At least now I get an alert with the textStatus as an error. It is something...but not enough. I could I do a successful post?

The issue is you're setting dataType: "jsonp" for a POST request. JSONP doesn't support POST requests, only GET requests.
I suggest changing to dataType: "json" to see if the service supports CORS. If it doesn't then you'll have to do something like proxy the request through the local server, to get around CORS.

You should not be sending "post" as "type", rather as "method"
And like pointed above, the data type should be json and not jsonp.
$.ajax({
method: "post",
data: JSON.stringify(beacon),
contentType: "application/json",
dataType: "json",
url: "myurl"}).done(function(response) {
alert("success");
//if in chrome
//console.log(response);
}).fail(function(error)
{
//if using Chrome
//console.log(error);
alert(error);
});

Facebook Graph jQuery AJAX call to post a photo on user's behalf

I'm trying to post a photo on the users behalf. I've been searching the web for the last 4 hours and I'm out of ideas.
JS:
$.ajax({
type: 'POST',
url: 'https://graph.facebook.com/v2.0/me/photos',
data: JSON.stringify({
url: 'https://www.facebook.com/images/fb_icon_325x325.png',
access_token: token
}),
success: function(data){
console.log(data);
},
error: function(a,b,c){
console.log(a+'|'+b+'|'+c);
}
})
the error function outputs the following:
[object Object]|error|Bad Request
I think there must be something wrong with the ajax request itself, but I can't figure out what it is. I've reconstructed my request using the Facebook Graph API explorer and everything works fine there. Any ideas?

Need to define the correct data type in the ajax request ( jsonp ), just try this will work :
$.ajax({
type: 'POST',
url: 'https://graph.facebook.com/v2.0/me/photos',
data: JSON.stringify({
url: 'https://www.facebook.com/images/fb_icon_325x325.png',
access_token: token
}),
dataType: "jsonp", //Just add this line ( jsonp not json ),
success: function(data){
console.log(data);
},
error: function(a,b,c){
console.log(a+'|'+b+'|'+c);
}
})

"400 Bad Request" response for AJAX request

I have the following jQuery AJAX request:
// collect form data and create user obj
var user = new User();
user.firstname = $("#usrFirstName").val();
user.lastname = $("#usrSurname").val();
user.role = $("#usrRole").val();
// actual ajax request
$.ajax({
type: 'POST',
url : 'http://awesome-url',
crossDomain: true,
data: user,
contentType:"application/json; charset=utf-8",
dataType: 'json'
}).done(function(data, status) {
alert(JSON.stringify(data));
}).fail(function(data, status) {
alert(status);
alert(JSON.stringify(data));
});
The response from the Server is:
"status":400,"statusText":"Bad Request"
"The request sent by the client was syntactically incorrect."
The server is running Spring-MVC. But as far as I can tell it is working correctly. Because if I'm sending a request manually with Postman and the following configuration it works.
Header:
Content-Type application/json; charset=utf-8
Content:
{"firstname":"alex","lastname":"lala","role":"admin"}
I have to mention that it is a cross-domain request (for the time developing, it will be hosted on the same domain as the server later). I did disable the security settings in the browser and AJAX requests to the server are working fine (as long as I don't have to send data).

you need to serialize your json, try:
$.ajax({
type: 'POST',
url : 'http://awesome-url',
crossDomain: true,
data: JSON.stringify(user),
contentType:'application/json; charset=utf-8',
dataType: 'json'
})

JSON.stringify() method is used to turn a javascript object into json string. You need to have this. In addition it is better to include success and error portions in the AJAX.
$.ajax({
type: 'POST',
url : 'http://awesome-url',
crossDomain: true,
data: JSON.stringify(user), // turn a javascript object into json string
contentType:'application/json; charset=utf-8',
dataType: 'json',
success: function (html) {
alert(html);
}, error: function (error) {
alert(error);
}
})