nodejs require file with function code example

Example 1: node import all functions from file

//we are in ./utils/dbHelper.js, here we have some helper functions
function connect() {
  // connect do db...
}

function closeConnection() {
  // close connection to DB...
}

//let's export this function to show them to the world outside
module.exports = {
  connect(),
    closeConnection()
};

// now we are in ./main.js and we want use helper functions from dbHelper.js
const DbHelper = require ('./utils/dbHelper'); // import all file and name it DbHelper
DbHelper.connect(); // use function from './utils/dbHelper' using dot(.)

// or we can import only chosen function(s)
const { connect, closeConnection } = require ('./utils/dbHelper');
connect(); // use function from class without dot

Example 2: Node require module

// Use require.main.require to get a module from the root folder.
const Globals = require.main.require("./globals.js");
const YourCustomModule = require("./yourmodule.js");

console.log(YourCustomModule.message);

// --- yourmodule.js ---
module.exports = {
	message: "Hello World!",
	otherData: "Hello Grepper!"
};