NodeJs TypeError require is not a function

Question

I am trying to require a file and afterwards pass it to a var  I am following this tutorial to create a authentication system  After writing the server js file and trying to compile I got a bson error therefore I changed the line that required the release version of it in mongoose   Here are my code and error     server js      require    app routes   app  passport     Error  require    app routes   app  passport                         TypeError  require      is not a function            at Object  lt anonymous gt   d  Node JS learning WorkWarV2 server js 38 24             at Module  compile  module js 434 26             at Object Module  extensions  js  module js 452 10             at Module load  module js 355 32             at Function Module  load  module js 310 12             at Function Module runMain  module js 475 10             at startup  node js 117 18             at node js 951 3  Process finished with exit code 1   I have read that this usually means that requireJS is not getting loaded properly yet I am not aware why or how to fix it   Edit due to comment   As asked  here is the result of console log require

User · Answer

Just wrap in Arrow function where you requiring the files

User · Answer

For me  this was an issue with cyclic dependencies   IOW  module A required module B  and module B required module A   So in module B  require    A   is an empty object rather than a function   How to deal with cyclic dependencies in Node js

User · Answer

For me  when I do Immediately invoked function  I need to put   at the end of require     Error   const fs   require  fs          gt      console log  wow          Good   const fs   require  fs           gt      console log  wow

User · Answer

I think this means that module exports in your   app routes module is not assigned to be a function so therefore require    app routes   does not resolve to a function so therefore  you cannot call it as a function like this require    app routes   app  passport      Show us   app routes if you want us to comment further on that   It should look something like this   module exports   function app  passport           code here     You are exporting a function that can then be called like require    app routes   app  passport      One other reason a similar error could occur is if you have a circular module dependency where module A is trying to require B  and module B is trying to require A    When this happens  it will be detected by the require   sub-system and one of them will come back as null and thus trying to call that as a function will not work   The fix in that case is to remove the circular dependency  usually by breaking common code into a third module that both can separately load though the specifics of fixing a circular dependency are unique for each situation

User · Answer

I ve faced to something like this too  in your routes file   export the function as an object like this    module exports          hbd  handlebar     and in your app file   you can have access to the function by   hbd and there is no ptoblem

User · Answer

Remember to export your routes js   In routes js  write your routes and all your code in this function module   exports   function app  passport        write here your code

User · Answer

For me  I got similar error when switched between branches - one used newer   typescriptish   version of  google-cloud datastore packages which returns object with Datastore constructor as one of properties of exported object and I switched to other branch for a task  an older datastore version was used there  which exports Datastore constructor  directly  as module exports value  I got the error because node modules still had newer modules used by branch I switched from

[javascript] NodeJs : TypeError: require(...) is not a function

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