Module Export & Required in Node js

In Node.js, module.exports is used to export objects, functions, classes, or other values from a module so they can be imported and used in other files. Below are some common patterns for exporting in Node.js:

Index. js file 

    var app = require('./app')

    console.log(app); App.js file

    module.export=[

  9999,8888,

]