syntax error unexpected token

Question

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  lt   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  gt  0           if opcao2 length  gt  0                   resposta   removeClass   html  Salvando a enquete    lt br clear  all  gt  lt br gt  lt img src  images switch-loading gif    gt                   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     necess  rio no m  nimo duas op    es                    else              resposta   addClass  warning-box   html  Coloque a pergunta da enquete               return false              End

User · Answer

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.

User · Answer

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

User · Answer

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

User · Answer

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   lt form action  path to file php  id  ajaxformx  gt    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

User · Answer

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     lt html gt  lt  html gt      tags  That first chevron  lt  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   lt html gt You must be authenticated to make this request lt  html gt    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

User · Answer

make sure you are not including the jquery code between the   lt  script    lt   script    If so remove that and code will work fine  It worked in my case

User · Answer

The error SyntaxError  Unexpected token  lt  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  lt   start of a heading element     Successful response     lt html gt     lt head gt  lt  head gt     lt body gt        foo    bar    baz    qux      lt  body gt   lt  html gt    Not-found response     lt html gt     lt head gt  lt  head gt     lt body gt       lt h1 gt Not Found lt  h1 gt       lt p gt The requested URL was not found on the server   If you entered the URL manually please check your spelling and try again  lt  p gt     lt  body gt   lt  html gt    Try visiting the data endpoint s URL in your browser to see what s returned

User · Answer

You have unnecessary    semicolons    Example here     else              resposta   addClass  warning-box   html     necess  rio no m  nimo duas op    es             The trailing   after   is incorrect   Another example here    else          resposta   addClass  warning-box   html  Coloque a pergunta da enquete

User · Answer

I was also having syntax error  unexpected token  lt  while posting a form via ajax  Then I used curl to see what it returns   curl -X POST --data  firstName a amp lastName a amp email array f com amp pass aaaa amp mobile 12345678901 amp nID 123456789123456789 amp age 22 amp prof xfd  http   handymama co CustomerRegistration php   I got something like this as a response     lt br   gt   lt b gt Warning lt  b gt    Cannot modify header information - headers already sent by  output started at  home handymama public html CustomerRegistration php 1  in  lt b gt  home handymama public html CustomerRegistration php lt  b gt  on line  lt b gt 3 lt  b gt  lt br   gt   lt br   gt   lt b gt Warning lt  b gt    Cannot modify header information - headers already sent by  output started at  home handymama public html CustomerRegistration php 1  in  lt b gt  home handymama public html CustomerRegistration php lt  b gt  on line  lt b gt 4 lt  b gt  lt br   gt   lt br   gt   lt b gt Warning lt  b gt    Cannot modify header information - headers already sent by  output started at  home handymama public html CustomerRegistration php 1  in  lt b gt  home handymama public html CustomerRegistration php lt  b gt  on line  lt b gt 7 lt  b gt  lt br   gt   lt br   gt   lt b gt Warning lt  b gt    Cannot modify header information - headers already sent by  output started at  home handymama public html CustomerRegistration php 1  in  lt b gt  home handymama public html CustomerRegistration php lt  b gt  on line  lt b gt 8 lt  b gt  lt br   gt    So all I had to do is just change the log level to only errors rather than warning   error reporting E ERROR

User · Answer

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

User · Answer

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

User · Answer

i checked all Included JS Paths  Example Change this    lt script src  js bootstrap min js  type  text javascript  gt  lt  script gt    TO   lt script src  https   maxcdn bootstrapcdn com bootstrap 3 3 6 js bootstrap min js  type  text javascript  gt  lt  script gt

User · Answer

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

User · Answer

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

User · Answer

Removing this line from my code solved my problem   header  Content-Type  application json  charset UTF-8

[javascript] syntax error: unexpected token <

Examples related to javascript

Examples related to jquery

Examples related to ajax

Examples related to syntax

Examples related to token