TypeError ajax is not a function

Question

I m trying to create a simple AJAX request which returns some data from a MySQL database  Here s my function below   function AJAXrequest url  postedData  callback          ajax              type   POST           url  url          data  postedData          dataType   json           success  callback                and here s where I call it  parsing in the required parameters   AJAXrequest  voting ajax php   imageData  function data        console log  success           Yet  my success callback does not run  as  success   is not logged to the console   and I get an error in my console   TypeError    ajax      is not a function  success  callback   What does this mean  I ve done AJAX requests before where the success event triggers an anonymous function inside of   ajax  but now I m trying to run a separate named function  in this case  a callback   How do I go about this

User · Answer

Not sure  but it looks like you have a syntax error in your code  Try     ajax     type   POST     url  url    data  postedData    dataType   json     success  callback       You had extra brackets next to   ajax which were not needed  If you still get the error  then the jQuery script file is not loaded

User · Answer

This is too late for an answer but this response may be helpful for future readers    I would like to share a scenario where  say there are multiple html files one  base html and multiple sub-HTMLs  and   ajax is being used in one of the sub-HTMLs   Suppose in the sub-HTML  js is included via URL  https   code jquery com jquery-3 5 0 js  and in the base parent HTML  via URL - https   code jquery com jquery-3 1 1 slim min js   then the slim version of JS will be used across all pages which use this sub-HTML as well as the base HTML mentioned above   This is especially true in case of using bootstrap framework which loads js using  https   code jquery com jquery-3 1 1 slim min js    So to resolve the problem  need to ensure that in all pages  js is included via URL  https   code jquery com jquery-3 5 0 js  or whatever is the latest URL containing all JQuery libraries   Thanks to Lily H  for pointing me towards this answer

User · Answer

If you are using bootstrap html template remember to remove the link to jquery slim at the bottom of the template  I post this detail here as I cannot comment answers yet

User · Answer

You have an error in your AJAX function  too much brackets  try instead   ajax

User · Answer

Checkout The Jquery Documentation     Deprecation Notice  The jqXHR success    jqXHR error    and jqXHR complete   callbacks are removed as of jQuery 3 0  You can use jqXHR done    jqXHR fail    and jqXHR always   instead

User · Answer

For anyone trying to run this in nodejs  It won t work out of the box  since jquery needs a browser  or similar   I was just trying to get the import to run and was logging console log    which wrote  Function  and then also console log   ajax  which returned undefined  I had no tsc errors and had autocomplete from intellij  so I was wondering what s going on   Then at some point I realised that node might be the problem and not typescript  I tried the same code in the browser and it worked  To make it work you need to run   require  jsdom   env     function err  window        if  err            console error err           return             var     require  jquery   window          credits  https   stackoverflow com a 4129032 3022127

User · Answer

Reference the jquery min version that includes ajax    lt script type  text javascript  src  https   cdnjs cloudflare com ajax libs jquery 3 1 1 jquery min js  gt  lt  script gt

User · Answer

Double-check if you re using full-version of jquery and not some slim version   I was using the jquery cdn-script link that comes with jquery  The problem is this one by default is slim jquery js which doesn t have the ajax function in it  So  if you re using  copy-pasted from Bootstrap website  slim version jquery script link  use the full version instead   That is to say use  lt script src  https   code jquery com jquery-3 1 1 min js  gt   instead of  lt script src  https   code jquery com jquery-3 1 1 slim min js

User · Answer

I know this is an old posting -- and Gus basically answered it  But in my experience  JQuery has since changed their code for importing from the CDN - so I thought I would go ahead and post their latest code for importing from the CDN   lt script src  quot https   code jquery com jquery-3 5 1 min js quot  integrity  quot sha256-9 aliU8dGd2tb6OSsuzixeV4y faTqgFtohetphbbj0  quot  crossorigin  quot anonymous quot  gt  lt  script gt

User · Answer

Neither of the answers here helped me  The problem was  I was using the slim build of jQuery  which had some things removed  ajax being one of them   The solution  Just download the regular  compressed or not  version of jQuery here and include it in your project

User · Answer

Don t use the slim build of jQuery  which doesn t have the ajax function in it  Use the full version instead from https   jquery com download  Note   Make sure to not use the jquery link copied from Bootstrap website  because they use the slim version

User · Answer

let me share my experience    my html page designer use    lt script src  https   code jquery com jquery-3 4 1 slim min js  integrity  sha384-J6qa4849blE2 poT4WnyKhv5vZF5SrPo0iEjwBvKU7imGFAV0wwj1yYfoRSJoZ n  crossorigin  anonymous  gt  lt  script gt    when I create a simple AJAX request  getting an error it says   TypeError    ajax      is not a function  So  i add    lt script src  https   code jquery com jquery-3 4 1 min js  integrity  sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo   crossorigin  anonymous  gt  lt  script gt    then  it perfectly works for me at least

User · Answer

There is a syntax error as you have placed parenthesis after ajax function and another set of parenthesis to define the argument list -  As you have written -    ajax          type   POST       url  url      data  postedData      dataType   json       success  callback       The parenthesis around ajax has to be removed it should be -    ajax       type   POST       url  url      data  postedData      dataType   json       success  callback

User · Answer

That s a problem with your version of jquery  Look here https   code jquery com  and add this script  lt script   src  quot https   code jquery com jquery-3 5 1 js quot    integrity  quot sha256-QWo7LDvxbWT2tbbQ97B53yJnYU3WhH C8ycbRAkjPDc  quot    crossorigin  quot anonymous quot  gt   lt  script gt

User · Answer

I encountered the same question  and my solution was  add the JQuery script   Especially  we should make sure the corresponding JQuery is loaded when we debug our js under the firefox chrome

[jquery] TypeError: $.ajax(...) is not a function?

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