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

Answer 1

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 ....!

Answer 2

For me, when I do Immediately invoked function, I need to put ; at the end of require().

Error:

const fs = require('fs')

(() => {
  console.log('wow')
})()

Good:

const fs = require('fs');

(() => {
  console.log('wow')
})()

Answer 3

Just wrap in Arrow function where you requiring the files

Answer 4

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 */ 

}

Answer 5

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

Answer 6

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.