JQuery - is not defined

Question

I have a simple jquery click event  lt script type  quot text javascript quot  gt        function                 post   click function                 alert  quot test quot                          lt  script gt   and a jquery reference defined in the site master  lt script src  quot  lt   ResolveUrl  quot   Scripts jquery-1 3 2 js quot    gt  quot  type  quot text javascript quot  gt  lt  script gt   I have checked that the script is being resolved correctly  I m able to see the markup and view the script directly in firebug  so I must be being found  However  I am still getting     is not defined  and none of the jquery works  I ve also tried the various variations of this like   document  ready and jQuery etc  It s an MVC 2 app on  net 3 5  I m sure I m being really dense  everywhere on google says to check the file is referenced correctly  which I have checked and checked again  please advise

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I got the same error message when I misspelled the jQuery reference and instead of type  text javascript  I typed     javascirpt

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It sounds like jQuery isn t loading properly  Which source version are you using   Alternatively  it could a be namespace collision  so try using jQuery explicitly instead of using    If that works  you may like to use noConflict to ensure the other code that s using   doesn t break

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Are you using any other JavaScript libraries  If so  you will probably need to use jQuery in compatibility mode   http   docs jquery com Using jQuery with Other Libraries

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As stated above  it happens due to the conflict of   variable   I resolved this issue by reserving a secondary variable for jQuery with no conflict   var  j   jQuery noConflict      and then use it anywhere   j   div    hide      more details can be found here

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That error can only be caused by one of three things    Your JavaScript file is not being properly loaded into your page You have a botched version of jQuery   This could happen because someone edited the core file  or a plugin may have overwritten the   variable  You have JavaScript running before the page is fully loaded  and as such  before jQuery is fully loaded    First of all  ensure  what script is call properly  it should looks like   lt script src  http   ajax googleapis com ajax libs jquery 1 7 1 jquery min js  type  text javascript  gt  lt  script gt    and shouldn t have attributes async or defer   Then you should check the Firebug net panel to see if the file is actually being loaded properly   If not  it will be highlighted red and will say  404  beside it   If the file is loading properly  that means that the issue is number 2   Make sure all jQuery javascript code is being run inside a code block such as     document  ready function          your code here       This will ensure that your code is being loaded after jQuery has been initialized   One final thing to check is to make sure that you are not loading any plugins before you load jQuery   Plugins extend the     object  so if you load a plugin before loading jQuery core  then you ll get the error you described   Note  If you re loading code which does not require jQuery to run it does not need to be placed inside the jQuery ready handler  That code may be separated using document readyState

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We have the same problem    but accidentally i checked folder properties and set something     You have to check the properties of each folders that you re accessing     right click folder  permissions  tab set the folder access     OWNER  create and delete files   GROUP  access files  OTHERS  access files   I hope that this is the solution

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I had this problem once for no apparent reason  It was happenning locally whilst I was running through the aspnet development server  It had been working and I reverted everything to a state where it had previously been working and still it didn t work  I looked in the chrome debugger and the jquery-1 7 1 min js had loaded without any problems  It was all very confusing  I still don t know what the problem was but closing the browser  closing the development server and then trying again sorted it out

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After tried everything here with no result  I solved the problem simply by moving the script src tag from body to head

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I have the same issue and no case resolve me the problem  The only thing that works for me  it s put on the  of the Site master file  the next    lt script src   lt    ResolveUrl    Scripts jquery-1 7 1 min js     gt   type  text javascript  gt  lt  script gt   lt script src   lt    ResolveUrl    Scripts bootstrap js bootstrap min js     gt   type  text javascript  gt  lt  script gt    With src   lt    ResolveUrl        the load of jQuery in the Content Pages is correct

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I had the same problem and resolved it by using document addEventListener  DOMContentLoaded        gt        code here

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This is the common issue to resolve this you have to check some point    Include Main Jquery Library  Check Cross-Browser Issue  Add Library on TOP of the jquery code  Check CDNs might be blocked    Full details are given in this blog click here

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I was having this same problem and couldn t figure out what was causing it  I recently converted my HTML files from Japanese to UTF-8  but I didn t do anything with the script files  Somehow jquery-1 10 2 min js became corrupted in this process  I still have no idea how   Replacing jquery-1 10 2 min js with the original fixed it

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It could be that you have your script tag called before the jquery script is called    lt script type  text javascript  src  js script js  gt  lt  script gt    lt script src  http   ajax googleapis com ajax libs jquery 1 7 1 jquery min js  type  text javascript  gt  lt  script gt    This results as   is not defined  Put the jquery js before your script tag  and it will work    like so    lt script src  http   ajax googleapis com ajax libs jquery 1 7 1 jquery min js  type  text javascript  gt  lt  script gt    lt script type  text javascript  src  js script js  gt  lt  script gt

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If the jQuery plugin call is next to the  lt  body gt   and your script is loaded before that  you should make your code run after window onload event  like this   window onload   function         YOUR JQUERY CODE        so  your code will run only after the window load  when all assets have been loaded  In that point  the jQuery     will be defined   If you use that     document  ready function          YOUR JQUERY CODE          the   isn t yet defined at this time  because it is called before the jQuery is loaded  and your script will fail on that first line on console

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if script tag has defer attribute it show the error      Uncaught ReferenceError    is not defined   and must remove the attribute defer from script tag

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That error means that jQuery has not yet loaded on the page   Using   document  ready      or any variant thereof will do no good  as   is the jQuery function   Using window onload should work here   Note that only one function can be assigned to window onload   To avoid losing the original onload logic  you can decorate the original function like so   originalOnload   window onload  window onload   function       if  originalOnload        originalOnload             YOUR JQUERY      This will execute the function that was originally assigned to window onload  and then will execute    YOUR JQUERY   See https   en wikipedia org wiki Decorator pattern for more detail about the decorator pattern

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Use a scripts section in the view and master layout   Put all your scripts defined in your view inside a Scripts section of the view  This way you can have the master layout load this after all other scripts have been loaded  This is the default setup when starting a new MVC5 web project  Not sure about earlier versions   Views Foo MyView cshtml      The rest of your view code above here    section Scripts            Either render the bundle defined with same name in BundleConfig cs         Scripts Render    bundles myCustomBundle              or hard code the HTML       lt script src  URL-TO-CUSTOM-JS-FILE  gt  lt  script gt        lt script type  text javascript  gt          document  ready function                  Do your custom javascript for this view here  Will be run after             loading all the other scripts                             lt  script gt      Views Shared  Layout cshtml   lt html gt   lt body gt       lt  --     Rest of your layout file here     -- gt        Scripts Render    bundles jquery        Scripts Render    bundles bootstrap        RenderSection  scripts   required  false   lt  body gt   lt  html gt    Note how the scripts section is rendered last in the master layout file

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When using jQuery in asp net  if you are using a master page and you are loading the jquery source file there  make sure you have the header contentplaceholder after all the jquery script references    I had a problem where any pages that used that master page would return    is not defined  simply because the incorrect order was making the client side code run before the jquery object was created  So make sure you have    lt head runat  server  gt       lt script type  text javascript  src  Scripts jquery-VERSION  js  gt  lt  script gt       lt asp ContentPlaceHolder id  Header  runat  server  gt  lt  asp ContentPlaceHolder gt   lt  head gt    That way the code will run in order and you will be able to run jQuery code on the child pages

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In the solution it is mentioned -   One final thing to check is to make sure that you are not loading any plugins before you load jQuery  Plugins extend the     object  so if you load a plugin before loading jQuery core  then you ll get the error you described    For avoiding this -   Many JavaScript libraries use   as a function or variable name  just as jQuery does  In jQuery s case    is just an alias for jQuery  so all functionality is available without using    If we need to use another JavaScript library alongside jQuery  we can return control of   back to the other library with a call to   noConflict

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I had a very similar issue  In my C  MVC application  JQuery was not being recognized  I needed to move the  Scripts Render    bundles jquery   from the bottom of my  Layout cshtml file to the head of the section  Also make sure you have grabbed Jquery as a Nuget package if you are using visual studio    lt head gt       Scripts Render    bundles jquery    lt  head gt

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I use Url Content and never have a problem    lt script src   lt    Url Content     Scripts jquery-1 4 1 min js     gt   type  text javascript  gt  lt  script gt

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it appears that if you locate your jquery js files under the same folder or in some subfolders where your html file is  the Firebug problem is solved  eg if your html is under C  folder1   then your js files should be somewhere under C  folder1   or C  folder1 folder2 etc  as well and addressed accordingly in the html doc  hope this helps

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Check the exact path of your jquery file is included    lt script src  assets plugins jquery jquery min js  gt  lt  script gt     if you add this on bottom of your page   please all call JS function below this declaration    Check using this code test     lt script type  text javascript  gt          Created by dadenew    Submit email subscription using ajax    Send email address    Send controller    Recive response       document  ready function       you can replace   with Jquery    alert   jquery working                Peace

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There is a way to make it automatically load up javascript before the rest of the code runs   Go into Views Shared Layout html and add the following    lt head gt     lt    Omitted code   gt     lt script src    Scripts jquery-1 10 2 min js  type  text javascript  gt  lt  script gt   lt  head gt

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after some tests i found a fast solution   you can add in top of your index page    lt script gt    jQuery   lt  script gt    it work very fine

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Just place  jquery url on the top of your jquery code  like this--   lt script src   lt   ResolveUrl    Scripts jquery-1 3 2 js    gt   type  text javascript  gt  lt  script gt    lt script type  text javascript  gt        function                 post   click function                 alert  test                          lt  script gt

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I just did the same thing and found i had a whole lot of   type  text javacsript    So they were loading  but no further hint as to why it wasn t working  Needless to say  proper spelling fixed it

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First you need to make sure that jQuery script is loaded  This could be from a CDN or local on your website   If you don t load this first before trying to use jQuery it will tell you that jQuery is not defined     lt script src  jquery min js  gt  lt  script gt    This could be in the HEAD or in the footer of the page  just make sure you load it before you try to call any other jQuery stuff    Then you need to use one of the two solutions below   function        your standard jquery code goes here with   prefix    best used inside a page with inline code      or outside the document ready  enter code here     jQuery      or  jQuery document  ready function        standard on load code goes here with   prefix    note  the   is setup inside the anonymous function of the ready command       please be aware that many times   document  ready function     code here    will not work

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make sure you really load jquery this is not jquery - it s the ui      lt script language  JavaScript       src  http   ajax googleapis com ajax libs jqueryui 1 10 0 jquery-ui min js  gt     lt  script gt    This is a correct script source for jquery     lt script language  JavaScript   src  http   ajax googleapis com ajax libs jquery 1 10 0 jquery min js  gt  lt  script gt

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Something that I didn t find here  but did happen to me  Make sure you don t have the jQuery slim version included  as that version of the jQuery library doesn t include the Ajax functionality   The result is that     works  but   get for example returns an error message stating that that function is undefined   Solution  include the full version of jQuery instead

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u just add at starting of your page     lt script src  http   ajax googleapis com ajax libs jquery 1 7 1 jquery min js  type  text javascript  gt  lt  script gt    and check your src link in a any browser address bar  if you are getting some code then this will work for you  asif

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It means that your jQuery library has not been loaded yet   You can move your code after pulling jQuery library   or you can use something like this  window onload   function         Your code here

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In my case I was pointing to Google hosted JQuery   It was included properly  but I was on an HTTPS page and calling it via HTTP   Once I fixed the problem  or allowed insecure content   it fired right up

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I had the same problem and it was because my reference to the jQuery js was not in the  tag   Once I switched that  everything started working   Anthony

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