CODEWITHSUNDEEP
node.js
Talha Noyon
Talha Noyon

Reputation: 854

How to call exported function inside the same file

I have faced a problem regarding calling an exported function inside the same file.

When I call it then the error shows the following.

UnhandledPromiseRejectionWarning: ReferenceError: findOrCreateMedia is not defined

where findOrCreateMedia is my function. How can I fix this?

Upvotes: 2

Views: 2495

Answers (3)

ritesh
ritesh

Reputation: 187

This is happening because you are losing your this object reference inside your calling function. For eg:

    module.exports.a = function () {
      return true
    }
    
    module.exports.b = function() {
      return this.a();
    }

here you will get the issue because when you call this.a(), it is referencing the this object of the b function.

To solve this your have to store your this object reference somewhere or use the arrow function, because the arrow function doesn't have there own this object so it will always reference the outer this object

To solve this, modify your function like this

    module.exports.a = function () {
      return true
    }
    
    module.exports.b = () => {
      return this.a();
    }

Upvotes: 1

Jatin Mehrotra
Jatin Mehrotra

Reputation: 11496

you can also ES6 import/export function:-

const someFunction = (){

...
}


export default someFuntion  ( in the case on single function)

When you want to export multiple functions

export { someFunction1, someFunction2}.

Now the place where you want to import

import somFunction from 'filelocation' ( note in case of default exports you need to use the same name of the function)

In the case of multiple functions.You can change the function name but keep in mind the order of exports and imports.

import { myFunction1,myFunction2} from 'fileLocation'

Upvotes: 0

Khanh Le Tran
Khanh Le Tran

Reputation: 900

Try this:

function functionName() { ... };
    
exports.functionName = functionName;

functionName();

Upvotes: 1

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