module.exports vs exports in Node.js

Question

I\'ve found the following contract in a Node.js module:

module.exports = exports = nano = function database_module(cfg) {...}

I wonder what

Answer 1

Each file you create is a module. module is an object. It has property called exports : {} which is empty object by default.

you can create functions/middlewares and add to this empty exports object such as exports.findById() => { ... } then require anywhere in your app and use...

controllers/user.js

exports.findById = () => {
    //  do something
}

require in routes.js to use:

const {findyId} = './controllers/user'