The newer ES Modules syntax is preferred over this style.

Use module.exports to export and require to import a module.

Import installed package

const request = require('request');

Local modules

Name exports

Create a variable or function or class, then at the end of the script typically you export it.

  • foo.js 
      function foo() {
  console.log("Hello");
  }

  exports.foo = 'foo';
  // Or
  module.exports.foo = 'foo';
  // Result:
  // { foo: 'foo'}

Select objects in the module.

const { bar } = require('./foo')
// Or, less common.
const bar = require('./foo').bar;

Default exports

  • foo.js 
      function foo() {
  console.log("Hello");
  }

  module.exports = 'foo';

Import the default object from module with any name you want.

const foo = require('./foo');