Can't i use this approach regarding the module export?

Question

const express = require('express');
const router = express.Router();

/*
* Helpers for Various Tasks
*/

// Helper function to reverse a string
const reverseString = (string) => [...string].reverse().join('');

// Helper function to shorten a string to fifty characters
const shortenString = (string) => {
    return string.length > 50 ? string.substring(0, 50) + "..." : string;
}


module.exports = reverseString;
module.exports = shortenString;

Then access it in the app.js as:

helper.reverseString helper.shortenString It is just named functions, so it should be able to do so, right?

Answer 1 · 2021-06-04T11:12:23Z

June 4, 2021 11:12am

Think of module.exports as an standard empty js object {}.

If you run module.exports = reverseString, module.exports now becomes the function. if you then run module.exports = shortenString;, you are reassigning module.exports as a new function.

What you need to do is add the functions as methods of the module.exports object with

module.exports.reverseString = reverseString and module.exports.shortenString = shortenString or simpler as

module.exports = { reverseString , shortenString }. module.exports is now an object with two methods.

Answer 2 · 2020-07-14T12:12:09Z

July 14, 2020 12:12pm

module.exports = reverseString; module.exports = shortenString;

If you will like to use module.exports with two different functions, the way you have done will not work. It best to write it this way

module.exports = { 
  reverseString,
  shortenString
};

Next, to import into the file, the code should look something like this

const helperMethods = require('./helperMethods');

helperMethods.reverseString("Some String");

Hope this helps

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Hamzah Iqbal

Hamzah Iqbal

Can't i use this approach regarding the module export?

2 Answers

Brian Wright

Brian Wright

Boon Kiat Seah

Boon Kiat Seah