module.exports Vs exports.method

module_exports_Vs_exports.method.js

// in exports_method.js
let add = (a, b) => a + b;
exports.add = add; // OR module.exports.add = add;

// in module_exports.js
let add = (a, b) => a + b;
module.exports = add;


// in caller.js
let module_exports = require('./module_exports');

let exports_method = require('./exports_method');

let test1 = module_exports.add(1,3);
console.log('module.exports result: ',test1);

let test2 = exports_method.add(1,3);
console.log('exports_method result: ',test2);

/**
 * 
 ==> module.exports = method
 - when we use module.exports then it's a method that is exported
 - so, wen we will make a require then it will be a function
 x = require('../some_module_that_returns_a_function');
 x is the functionBody
 x() to call the required function

 ==> exports.method = method OR module.exports.method = method
 - when we use exports.method then it's an object that is exported
 - so, wen we will make a require then it will be an object
 x = require('../some_module_that_returns_a_function');
 x is an object where {functionName: functionBody}
 x.functionName() to call the required function
 
 */