Accessing non-existent property of module.exports inside circular dependency NodeJS

Question

Im having some issues when using module.exports inside NodeJS, and I've followed multiple guides, and im almost certain Im doing it right. I have to scripts, main.js and event.js. Im trying to share a function from main.js to event.js, but its not working. Here is the code:

Main.js

function Scan(){
    if(fs.readdirSync('./events/').length === 0){
        console.log(colors.yellow('Events Folder Empty, Skipping Scan'))
    } else {
        var events = fs.readdirSync('./events/').filter(file => file.endsWith('.json'))
                for(const file of events){
                    let rawdata = fs.readFileSync('./events/' + file);
                    let cJSON = JSON.parse(rawdata);
                }
                events.sort()
                tevent = events[0]
                StartAlerter()
                }
}

module.exports = { Scan };

Event.js

const main = require('../main')

main.Scan;

This returns the error:

(node:19292) Warning: Accessing non-existent property 'Scan' of module exports inside circular dependency
(Use `node --trace-warnings ...` to show where the warning was created)

What am I doing wrong?

Answer 1

I discovered that the arrangement had no effect in the error.

I simply changed the way I exported the function from the Main.js

from:

module.exports = { Scan };

to:

exports.Scan = Scan

And in Event.js, I was able to access the file like this

const main = require("./Main.js");
let result = main.Scan();

This solved my problem, I hope it helps another developer 😎