Uncaught TypeError a indexOf is not a function error when opening new foundation project

Question

I ve created a new Foundation 5 project through bash  with foundation new my-project  When I open the index html file in Chrome an Uncaught TypeError  a indexOf is not a function error is shown in the console  originating in jquery min js 4   I created the project following the steps on the foundation site  but I can t seem to get rid of this error  Foundation and jQuery look like they are included and linked up correctly in the index html file  and the linked app js file is including   document  foundation     Does anyone know what is causing this error  and what a solution might be

User · Answer

I m using jQuery 3 3 1 and I received the same error  in my case  the URL was an Object vs a string   What happened was  that I took URL   window location - which returned an object  Once I ve changed it into window location href - it worked w o the e indexOf error

User · Answer

I solved this by installing the correct version of Jquery that my project required using npm

User · Answer

I faced this issue too  I was using jquery poptrox min js for image popping and zooming and I received an error which said          Uncaught TypeError  a indexOf is not a function    error    This is because indexOf was not supported in 3 3 1 jquery min js so a simple fix to this is to change it to an old version 2 1 0 jquery min js   This fixed it for me

User · Answer

Please add below jQuery Migrate Plugin   lt script src  https   code jquery com jquery-3 3 1 min js  gt  lt  script gt   lt script src  https   code jquery com jquery-migrate-1 4 1 min js  gt  lt  script gt

User · Answer

This error is often caused by incompatible jQuery versions  I encountered the same error with a foundation 6 repository  My repository was using jQuery 3  but foundation requires an earlier version  I then changed it and it worked    If you look at the version of jQuery required by the foundation 5 dependencies it states  jquery     2 1 0    Can you confirm that you are loading the correct version of jQuery   I hope this helps

User · Answer

This error might be caused by the jQuery event-aliases like  load     unload   or  error   that all are deprecated since jQuery 1 8  Lookup for these aliases in your code and replace them with the  on   method instead  For example  replace the following deprecated excerpt     window  load function            with the following     window  on  load   function

User · Answer

One of the possible reasons is when you load jQuery TWICE  like    lt script src       jquery js  gt  lt  script gt                            lt script src          jquery js  gt  lt  script gt    So  check your source code and remove duplicate jQuery load

[javascript] "Uncaught TypeError: a.indexOf is not a function" error when opening new foundation project

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