Identifier from require() is reported as undefined

Question

I am in node.js. I have two files.

winston.js:

class Winston {
    constructor(count) {
        this.count = count
    }
}

start.js

const winston = require('./winston')
let myWinston = new Winston(1)

when I run the start.js,(node ./start.js)

I get an error:

ReferenceError: Winston is not defined

Any one know how I should include the Winston file?

Try this [How to get a variable from a file to another file in node js](https://stackoverflow.com/questions/7612011/how-to-get-a-variable-from-a-file-to-another-file-in-node-js) — Andrew Halpern, Sep 05 '17 at 03:10
First: You're instanciating Winston (Title case), and you are importing winston (lowercase). Second: you need to export the class from winston.js — Gerardo, Sep 05 '17 at 03:15

Luan · Answer 1 · 2018-07-28T01:20:33.010

-1

winston.js:

You didn't export Winston class.

export.defaults = class Winston {
    constructor(count) {
        this.count = count
    }
}

start.js

You should use the result of require, not Winston.

const winston = require('./winston')
let myWinston = new winston(1)

edited Jul 28 '18 at 01:20

answered Sep 05 '17 at 03:10

Luan

score -1 · Answer 2 · answered Sep 05 '17 at 03:16

Look closely for the caps W in Winston

// start.js
const Winston = require('./winston')
let myWinston = new Winston(1)

and you need to export default in the other file

// winston.js
export default class Winston {
    constructor(count) {
        this.count = count
    }
}

2 Answers2