esModules.js

//my-module.js
let privateVar = "Ben Cherry";
export const publicVar = "Hey there!";

const privateFunction = () => {
    console.log( "Name:" + privateVar );
}

export const publicSetName = (strName) => {
    privateVar = strName;
}

export const publicGetName () => {
    privateFunction();
}

// index.js
import { publicSetName as setName } from 'my-module';

setName("Paul Kinlan");