I am running an AJAX call in my MooTools script, this works fine in Firefox but in Chrome I am getting a Uncaught SyntaxError: Unexpected token : error, I cannot determine why. Commenting out code to determine where the bad code is yields nothing, I am thinking it may be a problem with the JSON being returned. Checking in the console I see the JSON returned is this:
{"votes":47,"totalvotes":90}
I don't see any problems with it, why would this error occur?
vote.each(function(e){
e.set('send', {
onRequest : function(){
spinner.show();
},
onComplete : function(){
spinner.hide();
},
onSuccess : function(resp){
var j = JSON.decode(resp);
if (!j) return false;
var restaurant = e.getParent('.restaurant');
restaurant.getElements('.votes')[0].set('html', j.votes + " vote(s)");
$$('#restaurants .restaurant').pop().set('html', "Total Votes: " + j.totalvotes);
buildRestaurantGraphs();
}
});
e.addEvent('submit', function(e){
e.stop();
this.send();
});
});
Seeing red errors
Uncaught SyntaxError: Unexpected token <
in your Chrome developer's console tab is an indication of HTML in the response body.
What you're actually seeing is your browser's reaction to the unexpected top line <!DOCTYPE html> from the server.
Just an FYI for people who might have the same problem -- I just had to make my server send back the JSON as application/json and the default jQuery handler worked fine.
This has just happened to me, and the reason was none of the reasons above. I was using the jQuery command getJSON and adding callback=? to use JSONP (as I needed to go cross-domain), and returning the JSON code {"foo":"bar"} and getting the error.
This is because I should have included the callback data, something like jQuery17209314005577471107_1335958194322({"foo":"bar"})
Here is the PHP code I used to achieve this, which degrades if JSON (without a callback) is used:
$ret['foo'] = "bar";
finish();
function finish() {
header("content-type:application/json");
if ($_GET['callback']) {
print $_GET['callback']."(";
}
print json_encode($GLOBALS['ret']);
if ($_GET['callback']) {
print ")";
}
exit;
}
Hopefully that will help someone in the future.
I have just solved the problem. There was something causing problems with a standard Request call, so this is the code I used instead:
vote.each(function(element){
element.addEvent('submit', function(e){
e.stop();
new Request.JSON({
url : e.target.action,
onRequest : function(){
spinner.show();
},
onComplete : function(){
spinner.hide();
},
onSuccess : function(resp){
var j = resp;
if (!j) return false;
var restaurant = element.getParent('.restaurant');
restaurant.getElements('.votes')[0].set('html', j.votes + " vote(s)");
$$('#restaurants .restaurant').pop().set('html', "Total Votes: " + j.totalvotes);
buildRestaurantGraphs();
}
}).send(this);
});
});
If anyone knows why the standard Request object was giving me problems I would love to know.
I thought I'd add my issue and resolution to the list.
I was getting: Uncaught SyntaxError: Unexpected token < and the error was pointing to this line in my ajax success statement:
var total = $.parseJSON(response);
I later found that in addition to the json results, there was HTML being sent with the response because I had an error in my PHP. When you get an error in PHP you can set it to warn you with huge orange tables and those tables were what was throwing off the JSON.
I found that out by just doing a console.log(response) in order to see what was actually being sent. If it's an issue with the JSON data, just try to see if you can do a console.log or some other statement that will allow you to see what is sent and what is received.
When you request your JSON file, server returns JavaScript Content-Type header (text/javascript) instead of JSON (application/json).
According to MooTools docs:
Responses with javascript content-type will be evaluated automatically.
In result MooTools tries to evaluate your JSON as JavaScript, and when you try to evaluate such JSON:
{"votes":47,"totalvotes":90}
as JavaScript, parser treats { and } as a block scope instead of object notation. It is the same as evaluating following "code":
"votes":47,"totalvotes":90
As you can see, : is totally unexpected there.
The solution is to set correct Content-Type header for the JSON file. If you save it with .json extension, your server should do it by itself.
It sounds like your response is being evaluated somehow. This gives the same error in Chrome:
var resp = '{"votes":47,"totalvotes":90}';
eval(resp);
This is due to the braces '{...}' being interpreted by javascript as a code block and not an object literal as one might expect.
I would look at the JSON.decode() function and see if there is an eval in there.
Similar issue here:
Eval() = Unexpected token : error
This happened to me today as well. I was using EF and returning an Entity in response to an AJAX call. The virtual properties on my entity was causing a cyclical dependency error that was not being detected on the server. By adding the [ScriptIgnore] attribute on the virtual properties, the problem was fixed.
Instead of using the ScriptIgnore attribute, it would probably be better to just return a DTO.
If nothing makes sense, this error can also be caused by PHP Error that is embedded inside html/javascript, such as the one below
<br />
<b>Deprecated</b>: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in <b>C:\Projects\rwp\demo\en\super\ge.php</b> on line <b>54</b><br />
var zNodes =[{ id:1, pId:0, name:"ACE", url: "/ace1.php", target:"_self", open:true}
Not the <br /> etc in the code that are inserted into html by PHP is causing the error. To fix this kind of error (suppress warning), used this code in the start
error_reporting(E_ERROR | E_PARSE);
To view, right click on page, "view source" and then examine complete html to spot this error.
"Uncaught SyntaxError: Unexpected token" error appearance when your data return wrong json format, in some case, you don't know you got wrong json format.
please check it with alert(); function
onSuccess : function(resp){
alert(resp);
}
your message received should be: {"firstName":"John", "lastName":"Doe"}
and then you can use code below
onSuccess : function(resp){
var j = JSON.decode(resp); // but in my case i'm using: JSON.parse(resp);
}
with out error "Uncaught SyntaxError: Unexpected token"
but if you get wrong json format
ex:
...{"firstName":"John", "lastName":"Doe"}
or
Undefined variable: errCapt in .... on line<b>65</b><br/>{"firstName":"John", "lastName":"Doe"}
so that you got wrong json format, please fix it before you JSON.decode or JSON.parse
This happened to because I have a rule setup in my express server to route any 404 back to /# plus whatever the original request was. Allowing the angular router/js to handle the request. If there's no js route to handle that path, a request to /#/whatever is made to the server, which is just a request for /, the entire webpage.
So for example if I wanted to make a request for /correct/somejsfile.js but I miss typed it to /wrong/somejsfile.js the request is made to the server. That location/file does not exist, so the server responds with a 302 location: /#/wrong/somejsfile.js. The browser happily follows the redirect and the entire webpage is returned. The browser parses the page as js and you get
Uncaught SyntaxError: Unexpected token <
So to help find the offending path/request look for 302 requests.
Hope that helps someone.
I had the same problem and it turned out that the Json returned from the server
wasn't valid Json-P. If you don't use the call as a crossdomain call use regular Json.
My mistake was forgetting single/double quotation around url in javascript:
so wrong code was:
window.location = https://google.com;
and correct code:
window.location = "https://google.com";
In my case putting / at the beginning of the src of scripts or href of stylesheets solved the issue.
I got this error because I was missing the type attribute in script tag.
Initially I was using but when I added the type attribute inside the script tag then my issue is resolved
I got a "SyntaxError: Unexpected token I" when I used jQuery.getJSON() to try to de-serialize a floating point value of Infinity, encoded as INF, which is illegal in JSON.
In my case i ran into the same error, while running spring mvc application due to wrong mapping in my mvc controller
#RequestMapping(name="/private/updatestatus")
i changed the above mapping to
#RequestMapping("/private/updatestatus")
or
#RequestMapping(value="/private/updatestatus",method = RequestMethod.GET)
For me the light bulb went on when I viewed the source to the page inside the Chrome browser. I had an extra bracket in an if statement. You'll immediately see the red circle with a cross in it on the failing line. It's a rather unhelpful error message, because the the Uncaught Syntax Error: Unexpected token makes no reference to a line number when it first appears in the console of Chrome.
I did Wrong in this
`var fs = require('fs');
var fs.writeFileSync(file, configJSON);`
Already I intialized the fs variable.But again i put var in the second line.This one also gives that kind of error...
For those experiencing this in AngularJs 1.4.6 or similar, my problem was with angular not finding my template because the file at the templateUrl (path) I provided couldn't be found. I just had to provide a reachable path and the problem went away.
In my case it was a mistaken url (not existing), so maybe your 'send' in second line should be other...
This error might also mean a missing colon or : in your code.
Facing JS issues repetitively I am working on a Ckeditor apply on my xblock package. please suggest to me if anyone helping me out. Using OpenEdx, Javascript, xblock
xblock.js:158 SyntaxError: Unexpected token '=>'
at eval (<anonymous>)
at Function.globalEval (jquery.js:343)
at domManip (jquery.js:5291)
at jQuery.fn.init.append (jquery.js:5431)
at child.loadResource (xblock.js:236)
at applyResource (xblock.js:199)
at Object.<anonymous> (xblock.js:202)
at fire (jquery.js:3187)
at Object.add [as done] (jquery.js:3246)
at applyResource (xblock.js:201) "SyntaxError: Unexpected token '=>'\n at eval (<anonymous>)\n at Function.globalEval (http://localhost:18010/static/studio/common/js/vendor/jquery.js:343:5)\n at domManip (http://localhost:18010/static/studio/common/js/vendor/jquery.js:5291:15)\n at jQuery.fn.init.append (http://localhost:18010/static/studio/common/js/vendor/jquery.js:5431:10)\n at child.loadResource (http://localhost:18010/static/studio/bundles/commons.js:5091:27)\n at applyResource (http://localhost:18010/static/studio/bundles/commons.js:5054:36)\n at Object.<anonymous> (http://localhost:18010/static/studio/bundles/commons.js:5057:25)\n at fire (http://localhost:18010/static/studio/common/js/vendor/jquery.js:3187:31)\n at Object.add [as done] (http://localhost:18010/static/studio/common/js/vendor/jquery.js:3246:7)\n at applyResource (http://localhost:18010/static/studio/bundles/commons.js:5056:29)"
Late to the party but my solution was to specify the dataType as json. Alternatively make sure you do not set jsonp: true.
Try this to ignore this issue:
Cypress.on('uncaught:exception', (err, runnable) => {
return false;
});
Uncaught SyntaxError: Unexpected token }
Chrome gaved me the error for this sample code:
<div class="file-square" onclick="window.location = " ?dir=zzz">
<div class="square-icon"></div>
<div class="square-text">zzz</div>
</div>
and solved it fixing the onclick to be like
... onclick="window.location = '?dir=zzz'" ...
But the error has nothing to do with the problem..
Related
<script type="module" id="user-code">
try {
someUnknownReference;
} catch (error) {
console.log(error) // correct
console.log(error.toString()); // incorrect
console.log(error.stack.toString().split('\n')); // incorrect - line number and filename is wrong
}
//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbImluZGV4LmpzIl0sIm5hbWVzIjpbImxrc2xrcyJdLCJtYXBwaW5ncyI6IkFBQUFBLE1BQU0iLCJmaWxlIjoiYnVuZGxlLmpzIiwic291cmNlc0NvbnRlbnQiOlsibGtzbGtzIl19
</script>
I'm building a browser based code editor using Babel. All is working well, however I can't for the life of me extract the line number and file name out of the errors that happen during run time.
The example above is a simplified version of what I'm doing. I'm injecting a string into a script tag e.g scriptTag.innerHTML = bundledCode;
The first console.log prints exactly what I want to parse e.g it has the file name and correct line number which it gets from the sourcemap
ReferenceError: someUnknownReference is not defined
at index.js:1
However, as soon as I try to do anything with the error e.g the second console.log, I lose the line number and file name.
ReferenceError: someUnknownReference is not defined
My guess is maybe it's losing the reference to the sourcemap when we try to parse the object?
Thanks in advance for any help!
I think Chrome console is automatically consuming source maps to provide the correct error msg if you're console logging the error. Not if you're grabbing the actual string. Do you need something like this: https://www.npmjs.com/package/sourcemapped-stacktrace?
I've tried many things and there's no way, always appears this error
I tried to use only one option to see if passed, changed the call of jquery, but not.
I looked in various places on the internet about this error, but could not solve or understand why it is happening.
On my pc using EasyPHP works perfectly, but when I put online does not work.
Syntax Error: unexpected token <
Here's my code:
$(function(){
$('#salvar').click(function(){
var key = 'salvar';
var title = $('#title').val();
var opcao1 = $('#opcao1').val();
var opcao2 = $('#opcao2').val();
var opcao3 = $('#opcao3').val();
var opcao4 = $('#opcao4').val();
var opcao5 = $('#opcao5').val();
var opcao6 = $('#opcao6').val();
if(title.length > 0){
if(opcao2.length > 0){
$('#resposta').removeClass().html('Salvando a enquete...<br clear="all"><br><img src="images/switch-loading.gif" />');
$.ajax({
type : 'POST',
url : 'funcoes/enquete_adm.php',
dataType : 'json',
data: {key:key,title:title,opcao1:opcao1,opcao2:opcao2,opcao3:opcao3,opcao4:opcao4,opcao5:opcao5,opcao6:opcao6},
success : function(data){
if(data.sql == 'ok'){
$('#resposta').addClass('success-box').html('Enquete Salva!').fadeIn(1000);
$('#control').fadeOut();
}else if(data.sql == 'error'){
$('#resposta').addClass('info-box').html('Ops, aconteceu um erro. Por favor, tente novamente').fadeIn(1000);
}
},
error: function (XMLHttpRequest, textStatus, errorThrown) {
alert("XMLHttpRequest " + XMLHttpRequest[0]);alert(" errorThrown: " + errorThrown);alert( " textstatus : " + textStatus);
}
});
}else{
$('#resposta').addClass('warning-box').html('É necessário no mínimo duas opções');
};
}else{
$('#resposta').addClass('warning-box').html('Coloque a pergunta da enquete');
};
return false;
});
}); // End
This usually happens when you're including or posting to a file which doesn't exist.
The server will return a regular html-formatted "404 Not Found" enclosed with
'<html></html>'
tags. That first chevron < isn't valid js nor valid json, therefore it triggers an unexpected token.
What if you try to change 'funcoes/enquete_adm.php' to an absolute url, just to be sure?
EDIT (several years later)
The root cause might not always come from 404 errors. Sometimes you can make a request to an API and receive HTML formatted errors. I've stumbled to a couple of cases in which the API endpoint should have returned
{
error: "you must be authenticated to make this request"
}
With header 401. And instead I got
<html>You must be authenticated to make this request</html>
With header 200.
Given the header is 200 you can't tell the request has failed beforehand, and you're stuck to try and JSON.parse the response to check if it's valid.
You have unnecessary ; (semicolons):
Example here:
}else{
$('#resposta').addClass('warning-box').html('É necessário no mínimo duas opções');
};
The trailing ; after } is incorrect.
Another example here:
}else{
$('#resposta').addClass('warning-box').html('Coloque a pergunta da enquete');
};
I suspect you're getting text/html encoding in response to your request so I believe the issue is:
dataType : 'json',
try changing it to
dataType : 'html',
From http://api.jquery.com/jQuery.get/:
dataType
Type: String
The type of data expected from the server. Default: Intelligent Guess (xml, json, script, or html).
The error SyntaxError: Unexpected token < likely means the API endpoint didn't return JSON in its document body, such as due to a 404.
In this case, it expects to find a { (start of JSON); instead it finds a < (start of a heading element).
Successful response:
<html>
<head></head>
<body>
{"foo": "bar", "baz": "qux"}
</body>
</html>
Not-found response:
<html>
<head></head>
<body>
<h1>Not Found</h1>
<p>The requested URL was not found on the server. If you entered the URL manually please check your spelling and try again.</p>
</body>
</html>
Try visiting the data endpoint's URL in your browser to see what's returned.
I had a similar problem, and my issue was that I was sending javascript to display console messages.
Even when I looked at the file in my browser (not through the application) it showed exactly as I expected it to (eg the extra tags weren't showing), but there were showing in the html/text output and were trying to be parsed.
Hope this helps someone!
I suspect one of your scripts includes a source map URL. (Minified jQuery contains a reference to a source map, for example.)
When you open the Chrome developer tools, Chrome will try to fetch the source map from the URL to aid debugging. However, the source map does not actually exist on your server, but you are instead sent a regular 404 page containing HTML.
This error can also arise from a JSON AJAX call to a PHP script that has an error in its code. Servers are often set up to return PHP error information formatted with html markup. This response is interpreted as invalid JSON, resulting in the "unexpected token <" AJAX error.
To view the PHP error using Chrome, go to the Network panel in the web inspector, click the PHP file listed on the left side, and click on the Response tab.
When posting via ajax, it's always a good idea to first submit normally to ensure the file that's called is always returning valid data (json) and no errors with html tags or other
<form action="path/to/file.php" id="ajaxformx">
By adding x to id value, jquery will not process it.
Once you are sure everything is fine then remove the x from id="ajaxform" and the empty the action attribute value
This is how I sorted the same error for myself just a few minutes ago :)
I was also having syntax error: unexpected token < while posting a form via ajax. Then I used curl to see what it returns:
curl -X POST --data "firstName=a&lastName=a&email=array#f.com&pass=aaaa&mobile=12345678901&nID=123456789123456789&age=22&prof=xfd" http://handymama.co/CustomerRegistration.php
I got something like this as a response:
<br />
<b>Warning</b>: Cannot modify header information - headers already sent by (output started at /home/handymama/public_html/CustomerRegistration.php:1) in <b>/home/handymama/public_html/CustomerRegistration.php</b> on line <b>3</b><br />
<br />
<b>Warning</b>: Cannot modify header information - headers already sent by (output started at /home/handymama/public_html/CustomerRegistration.php:1) in <b>/home/handymama/public_html/CustomerRegistration.php</b> on line <b>4</b><br />
<br />
<b>Warning</b>: Cannot modify header information - headers already sent by (output started at /home/handymama/public_html/CustomerRegistration.php:1) in <b>/home/handymama/public_html/CustomerRegistration.php</b> on line <b>7</b><br />
<br />
<b>Warning</b>: Cannot modify header information - headers already sent by (output started at /home/handymama/public_html/CustomerRegistration.php:1) in <b>/home/handymama/public_html/CustomerRegistration.php</b> on line <b>8</b><br />
So all I had to do is just change the log level to only errors rather than warning.
error_reporting(E_ERROR);
i checked all Included JS Paths
Example
Change this
<script src="js/bootstrap.min.js" type="text/javascript"></script>
TO
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" type="text/javascript"></script>
Removing this line from my code solved my problem.
header("Content-Type: application/json; charset=UTF-8");
Just gonna throw this in here since I encountered the same error but for VERY different reasons.
I'm serving via node/express/jade and had ported an old jade file over. One of the lines was to not bork when Typekit failed:
script(type='text/javascript')
try{Typekit.load();}catch(e){}
It seemed innocuous enough, but I finally realized that for jade script blocks where you're adding content you need a .:
script(type='text/javascript').
try{Typekit.load();}catch(e){}
Simple, but tricky.
Just ignore parameter passing as a false in java script functions
Ex:
function getCities(stateId,locationId=false){
// Avoid writting locationId= false kind of statements
/*your code comes here*/
}
Avoid writting locationId= false kind of statements, As this will give the error in chrome and IE
This happened to me with a page loaded in via an iframe. The iframe src page had a 404 script reference. Obviously I couldn't find the script reference in the parent page, so it took me a while to find the culprit.
make sure you are not including the jquery code between the
< script >
< /script >
If so remove that and code will work fine, It worked in my case.
If you are running the NVM on your system, you must check the node version before starting the server.
I have developed a JavaScript file which I use in the context of a WordPress plugin. The jQuery contains a typo:
alert('prv_requestSelectionComplement check odds_pos for horse_id='+tmpSel.horse_id+' oddsPositionLimit='.JSON.stringify(oddsPositionLimit)+' odds_pos='+complement.odds_pos);
You see: Before JSON I used the PHP '.' instead of the JavaScript '+'.
I did not get any error nor warning. The function just stopped working. It took me a while to spot the problem with careful code review. Is there a possibility to get a reasonable error message without double checking all the places where I edited? For example using Firebug?
What is the recommended way to deal with this problem?
Try/Catch will help you:
try {
alert(this is an error);
}
catch (e){
console.log('There is a error: ' + e);
alert('There is a error: ' + e);
}
In this specific case you should get the following error within the Firebug or DevTools console:
" oddsPositionLimit=".JSON is undefined
This message already indicates that the error is located between your string and your JSON.stringify() call.
Note that 'string'.something is valid JavaScript syntax, because strings are objects in JavaScript and have some properties and values. So the error message does not refer to the dot between your string and JSON but says that the property JSON is not defined for the string " oddsPositionLimit=".
I am returning a string from my server to my client and jQuery throws me the following error.
JQUERY: Uncaught Error: Syntax error, unrecognized expression
Returned String is "D:/Upload/abcd#xyz.com/tracks/b8d8c86c40ee402899af1a999bbb55b1.mp3"
I am not able to figure out whats wrong with this string.
Pointers required. Thanks in advance.
Using JQuery version 1.11.1.
Apologies for that. Below is my jQueryCode. I am able to fetch the value for uploadedTrackId but it throws me an error at the next line. It does return me the path value but somehow jQuery is not able to parse it.
success: function (data,status) {
if(data['Success']!=null){
$('#progress-bar').load(document.URL + ' #progress-bar');
$('#progress-percent').css('color',"graytext");
$('#progress-percent').html(data['Success']);
//These are the global variables containing id/path for the recently uploaded track.
uploadedTrackId = $(data['id']);
uploadedTrackPath = $(data['path']);
You appear the be using the results as jQuery selectors. Just use them as is.
uploadedTrackId = data['id'];
uploadedTrackPath = data['path'];
You do not show the Ajax call, but data is probably already just an object with various properties. You should be able to also do the following:
uploadedTrackId = data.id;
uploadedTrackPath = data.path;
I've tried many things and there's no way, always appears this error
I tried to use only one option to see if passed, changed the call of jquery, but not.
I looked in various places on the internet about this error, but could not solve or understand why it is happening.
On my pc using EasyPHP works perfectly, but when I put online does not work.
Syntax Error: unexpected token <
Here's my code:
$(function(){
$('#salvar').click(function(){
var key = 'salvar';
var title = $('#title').val();
var opcao1 = $('#opcao1').val();
var opcao2 = $('#opcao2').val();
var opcao3 = $('#opcao3').val();
var opcao4 = $('#opcao4').val();
var opcao5 = $('#opcao5').val();
var opcao6 = $('#opcao6').val();
if(title.length > 0){
if(opcao2.length > 0){
$('#resposta').removeClass().html('Salvando a enquete...<br clear="all"><br><img src="images/switch-loading.gif" />');
$.ajax({
type : 'POST',
url : 'funcoes/enquete_adm.php',
dataType : 'json',
data: {key:key,title:title,opcao1:opcao1,opcao2:opcao2,opcao3:opcao3,opcao4:opcao4,opcao5:opcao5,opcao6:opcao6},
success : function(data){
if(data.sql == 'ok'){
$('#resposta').addClass('success-box').html('Enquete Salva!').fadeIn(1000);
$('#control').fadeOut();
}else if(data.sql == 'error'){
$('#resposta').addClass('info-box').html('Ops, aconteceu um erro. Por favor, tente novamente').fadeIn(1000);
}
},
error: function (XMLHttpRequest, textStatus, errorThrown) {
alert("XMLHttpRequest " + XMLHttpRequest[0]);alert(" errorThrown: " + errorThrown);alert( " textstatus : " + textStatus);
}
});
}else{
$('#resposta').addClass('warning-box').html('É necessário no mínimo duas opções');
};
}else{
$('#resposta').addClass('warning-box').html('Coloque a pergunta da enquete');
};
return false;
});
}); // End
This usually happens when you're including or posting to a file which doesn't exist.
The server will return a regular html-formatted "404 Not Found" enclosed with
'<html></html>'
tags. That first chevron < isn't valid js nor valid json, therefore it triggers an unexpected token.
What if you try to change 'funcoes/enquete_adm.php' to an absolute url, just to be sure?
EDIT (several years later)
The root cause might not always come from 404 errors. Sometimes you can make a request to an API and receive HTML formatted errors. I've stumbled to a couple of cases in which the API endpoint should have returned
{
error: "you must be authenticated to make this request"
}
With header 401. And instead I got
<html>You must be authenticated to make this request</html>
With header 200.
Given the header is 200 you can't tell the request has failed beforehand, and you're stuck to try and JSON.parse the response to check if it's valid.
You have unnecessary ; (semicolons):
Example here:
}else{
$('#resposta').addClass('warning-box').html('É necessário no mínimo duas opções');
};
The trailing ; after } is incorrect.
Another example here:
}else{
$('#resposta').addClass('warning-box').html('Coloque a pergunta da enquete');
};
I suspect you're getting text/html encoding in response to your request so I believe the issue is:
dataType : 'json',
try changing it to
dataType : 'html',
From http://api.jquery.com/jQuery.get/:
dataType
Type: String
The type of data expected from the server. Default: Intelligent Guess (xml, json, script, or html).
The error SyntaxError: Unexpected token < likely means the API endpoint didn't return JSON in its document body, such as due to a 404.
In this case, it expects to find a { (start of JSON); instead it finds a < (start of a heading element).
Successful response:
<html>
<head></head>
<body>
{"foo": "bar", "baz": "qux"}
</body>
</html>
Not-found response:
<html>
<head></head>
<body>
<h1>Not Found</h1>
<p>The requested URL was not found on the server. If you entered the URL manually please check your spelling and try again.</p>
</body>
</html>
Try visiting the data endpoint's URL in your browser to see what's returned.
I had a similar problem, and my issue was that I was sending javascript to display console messages.
Even when I looked at the file in my browser (not through the application) it showed exactly as I expected it to (eg the extra tags weren't showing), but there were showing in the html/text output and were trying to be parsed.
Hope this helps someone!
I suspect one of your scripts includes a source map URL. (Minified jQuery contains a reference to a source map, for example.)
When you open the Chrome developer tools, Chrome will try to fetch the source map from the URL to aid debugging. However, the source map does not actually exist on your server, but you are instead sent a regular 404 page containing HTML.
This error can also arise from a JSON AJAX call to a PHP script that has an error in its code. Servers are often set up to return PHP error information formatted with html markup. This response is interpreted as invalid JSON, resulting in the "unexpected token <" AJAX error.
To view the PHP error using Chrome, go to the Network panel in the web inspector, click the PHP file listed on the left side, and click on the Response tab.
When posting via ajax, it's always a good idea to first submit normally to ensure the file that's called is always returning valid data (json) and no errors with html tags or other
<form action="path/to/file.php" id="ajaxformx">
By adding x to id value, jquery will not process it.
Once you are sure everything is fine then remove the x from id="ajaxform" and the empty the action attribute value
This is how I sorted the same error for myself just a few minutes ago :)
I was also having syntax error: unexpected token < while posting a form via ajax. Then I used curl to see what it returns:
curl -X POST --data "firstName=a&lastName=a&email=array#f.com&pass=aaaa&mobile=12345678901&nID=123456789123456789&age=22&prof=xfd" http://handymama.co/CustomerRegistration.php
I got something like this as a response:
<br />
<b>Warning</b>: Cannot modify header information - headers already sent by (output started at /home/handymama/public_html/CustomerRegistration.php:1) in <b>/home/handymama/public_html/CustomerRegistration.php</b> on line <b>3</b><br />
<br />
<b>Warning</b>: Cannot modify header information - headers already sent by (output started at /home/handymama/public_html/CustomerRegistration.php:1) in <b>/home/handymama/public_html/CustomerRegistration.php</b> on line <b>4</b><br />
<br />
<b>Warning</b>: Cannot modify header information - headers already sent by (output started at /home/handymama/public_html/CustomerRegistration.php:1) in <b>/home/handymama/public_html/CustomerRegistration.php</b> on line <b>7</b><br />
<br />
<b>Warning</b>: Cannot modify header information - headers already sent by (output started at /home/handymama/public_html/CustomerRegistration.php:1) in <b>/home/handymama/public_html/CustomerRegistration.php</b> on line <b>8</b><br />
So all I had to do is just change the log level to only errors rather than warning.
error_reporting(E_ERROR);
i checked all Included JS Paths
Example
Change this
<script src="js/bootstrap.min.js" type="text/javascript"></script>
TO
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" type="text/javascript"></script>
Removing this line from my code solved my problem.
header("Content-Type: application/json; charset=UTF-8");
Just gonna throw this in here since I encountered the same error but for VERY different reasons.
I'm serving via node/express/jade and had ported an old jade file over. One of the lines was to not bork when Typekit failed:
script(type='text/javascript')
try{Typekit.load();}catch(e){}
It seemed innocuous enough, but I finally realized that for jade script blocks where you're adding content you need a .:
script(type='text/javascript').
try{Typekit.load();}catch(e){}
Simple, but tricky.
Just ignore parameter passing as a false in java script functions
Ex:
function getCities(stateId,locationId=false){
// Avoid writting locationId= false kind of statements
/*your code comes here*/
}
Avoid writting locationId= false kind of statements, As this will give the error in chrome and IE
This happened to me with a page loaded in via an iframe. The iframe src page had a 404 script reference. Obviously I couldn't find the script reference in the parent page, so it took me a while to find the culprit.
make sure you are not including the jquery code between the
< script >
< /script >
If so remove that and code will work fine, It worked in my case.
If you are running the NVM on your system, you must check the node version before starting the server.