JAVASCRIPT

What is the syntax to export a function from a module in Node.js

function foo() {}
function bar() {}

// To export above functions:
module.exports = foo;
module.exports = bar;

// And in the file you want to use these functions,
// import them like this:
const foo = require('./module/path');
const bar = require('./module/path');

how to export a function in nodejs

function foo(x, y) {
  return x + y;
}

function bar(x, y) {
  return x - y;
}

//You can also export numbers, classes, objects, etc
const foobar = 33;

module.exports = { foo, bar, num };

how to export module in node js

module.exports ={
 //functions
}

module export in node js

var users = [
    { userName: "BarneyRubble", age: 38   },
    { userName: "WilmaFlintstone", age: 37 },
    { userName: "FredFlintstone", age: 36 }
];

module.exports.getAllUsers = function(){
    return users;
}

export function node js

module.exports.yourFunctionName = function()
{

}

exports in node js

require function returns exports of the require module.
module.exports is the returned object.
1)use module.exports to export single varibale e.g one class or one function 
e.g module.exports= Calculator.
2)use exports to export multiple named variables 
export.add = (a,b)=> a+b;
export.multiple=(a,b)=> a*b;

module.exports with JavaScript

mycoolmodule/index.js
module.exports = "123";


routes/index.js


var mymodule = require('mycoolmodule')

var router = express.Router();

/* GET home page. */
router.get('/', function(req, res, next) {
	console.log(mymodule);
});
 
/*will show 123 in the terminal*/
module.exports = router;