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

Problem solved, heres what I did differently:

module.exports = { Scan };

Is declared before the Scan function is defined, like so:

module.exports = { Scan };
function Scan(){
//Code
}

Then in event.js, I wrote

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

As it is now a module, and can be used with the require() function. Then to execute the funciton in event.js, I write

main.Scan()

To execute it.