Uncaught TypeError undefined is not a function on loading jquery-min js

Question

I m building a normal webpage which requires me to load about five CSS files and ten Javascript files    When loading them separately in the HTML page  my webpage loads fine  Now for production  I concatenated all the Javascript into a single file  in the order needed  and all the CSS into another file  But when I try to run the web page with the concatenated files it throws an error saying   Uncaught TypeError  undefined is not a function   On the line where jquery min js is being loaded in the concatenated Javascript file   What can I do to mitigate this  I want to concatenate all files and minify them for production  Please help    EDIT  I merged the Javascript and CSS in the order they were when they were being loaded individually and were working fine

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In case there are any morons out there like me  I had this frustrating problem because I forgot a simple   new   keyword before instantiating a new object

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I ve run into the very same issue  when mistakenly named variable with the very same name  as function   So this   isLive   isLive data     failed  generating OP s mentioned error message   Fix to this was as simple as changing above line to   isItALive   isLive data     I don t know  how much does it helps in this situation  but I decided to put this answer for others looking for a solution for similar problems

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Remember  Javascript functions are CASE SENSITIVE   I had a case where I m pretty sure that my code would run smoothly  But still  got an error and I checked the Javascript console of Google Chrome to check what it is   My error line is  opt SetAttribute  value  values a      And got the same error message   Uncaught TypeError  undefined is not a function   Nothing seems wrong with the code above but it was not running  I troubleshoot for almost an hour and then compared it with my other running code  My error is that it was set to SetAttribute  which should be setAttribute

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I had this problem recently with the jQuery Validation plug-in  using Squishit  also getting the js error       undefined is not a function    I fixed it by changing the reference to the unminified jquery validate js file  rather than jquery validate min js    MvcHtmlString Create       SquishIt Framework Bundle JavaScript            Add    Scripts Libraries jquery-1 8 2 min js            Add    Scripts Libraries jquery-ui-1 9 1 custom min js            Add    Scripts Libraries jquery unobtrusive-ajax min js            Add    Scripts Libraries jquery validate js            Add    Scripts Libraries jquery validate unobtrusive js                more files   I think that the minified version of certain files  when further compressed using Squishit  for example  might in some cases not deal with missing semi-colons and the like  as  Dustin suggests  so you might have to experiment with which files you can doubly compress  and which you just leave to Squishit or whatever you re bundling with

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For those out there who still couldn t fix this  I did so by changing my  this  to    this   when using jQuery   E G       icon   click function         this fadeOut          Fixed       icon   click function           this  fadeOut

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Yes  i also I fixed it changing in the js libraries to the unminified   For example  in the  tag  change    lt script type  text javascript  src  js jquery ui core min js  gt  lt  script gt   lt script type  text javascript  src  js jquery ui widget min js  gt  lt  script gt   lt script type  text javascript  src  js jquery ui rcarousel min js  gt  lt  script gt    For    lt script type  text javascript  src  js jquery ui core js  gt  lt  script gt   lt script type  text javascript  src  js jquery ui widget js  gt  lt  script gt   lt script type  text javascript  src  js jquery ui rcarousel js  gt  lt  script gt    Quiting the  min  as unminified   Thanks for the idea

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Make sure you have commented out any commentaries  Sometimes when copying and pasting you will leave out the          Also when you go into the console they will list your errors and you should take it one at a time  If you see  Uncaught SyntaxError  Unexpected token     That might mean it is reading your js file and it isn t getting past the first line           jquery tools 1 1 2 - The missing UI library for the Web        tools tabs-1 0 4  tools tooltip-1 1 2  tools scrollable-1 1 2  tools overlay-1 1 2  tools expose-1 0 5        Copyright  c  2009 Tero Piirainen    http   flowplayer org tools     File generated  Wed Oct 07 09 40 16 GMT 2009

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I got this when I accidentally passed too many parameters into a jquery function that only expected one callback parameter   For others troubleshooting  make sure you check all your jquery function calls for extra parameters

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This solution worked for me           function                your code        jQuery      Move your code inside the closure and use   instead of jQuery  I found the above solution in https   magento stackexchange com questions 33348 uncaught-typeerror-undefined-is-not-a-function-when-using-a-jquery-plugin-in-ma   after seraching too much

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I just had the same message with the following code  in IcedCoffeeScript    f    err cb  - gt    cb null  true  await f defer err  res console log err if err     This seemed to me like regular ICS code  I unfolded the await-defer construct to regular CoffeeScript   f  err res  - gt    console log err if err   What really happend was that I tried to pass 1 callback function  with 2 parameters   to function f expecting two parameters  effectively not setting cb inside f  which the compiler correctly reported as undefined is not a function   The mistake happened because I blindly pasted callback-style boilerplate code  f doesn t need an err parameter passed into it  thus should simply be   f    cb  - gt    cb null  true f  err res  - gt    console log err if err   In the general case  I d recommend to double-check function signatures and invocations for matching arities  The call-stack in the error message should be able to provide helpful hints   In your special case  I recommend looking for function definitions appearing twice in the merged file  with different signatures  or assignments to global variables holding functions

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I got the same error from having two references to different versions of jQuery   In my master page    lt script type  text javascript  src  https   ajax googleapis com ajax libs jquery 1 4 4 jquery min js  gt  lt  script gt    And also on the page    lt script type  text javascript  src  http   ajax googleapis com ajax libs jquery 1 8 3 jquery min js  gt   lt  script gt

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Assuming this problem still has not be resolved  a lot of individual files don t end their code with a semicolon  Most jQuery scripts end with  jQuery  and you need to have  jQuery     As separate files the script will load just fine but as one individual file you need the semicolons

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You might have to re-check the order in which you are merging the files  it should be something like    jquery min js jquery-ui js any third party plugins you loading your custom JS

[javascript] Uncaught TypeError: undefined is not a function on loading jquery-min.js

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