Why do you need `export`

You can use export statement to export function, objects or primitive values to other JavaScript code.

By looking at the following example you can learn how you can export a function to another js code

@your util.js file

function calculatesalary(){
        return "Salary is 10000";
}
export default calculatesalary;

@your index.js

import calc from './Util.js'

console.log(calc)

Learn everything about export default