Vfrdtyky

I'm getting the error while running the following code in Node.js

var assert = require('assert');

var request = require('request');

var index = require('./index');

it('verify javascript function', function(done) {

    var v2 = index.AddNumbers(5, 6);

    assert.equal(11, v2);

    done();

});

The index.js file contain the following code:

function AddNumbers(a,b){

    return a+b;

}

What am I doing wrong?

This happened to me many times because of circular dependency, check if you have 2 classes that are requiring each other, remove one of them from requiring the other and the issue should be solved

With NodeJS modules, to make something public, you have to export it. Add this to the end of index.js:

module.exports.AddNumbers = AddNumbers;

Here it is running on my machine:

$ cat index.js 

function AddNumbers(a,b){

    return a+b;

}



module.exports.AddNumbers = AddNumbers;



$ cat example.js 

var index = require('./index');

var v2 = index.AddNumbers(5,6);

console.log(v2);



$ node example.js

11

If you need to expose a specific component, function or a variable to public. You have to exports those components using JavaScript modules.

let add = (a,b)=>{

    return ( a+b);

}

module.exports.add=add;

or if you want to expose multiple functions, you can do as follows.

let add = (a,b)=>{

    return (a+b);

}

let subtract = (a, b)=>{

    return (a-b);

}

module.exports={

   add : add,

   subtract : subtract

};