Jan 31, 2023 · To include a module with the require () function, that module must be saved with a .js extension instead of .mjs when the import () statement is used. In this article, you have learned what the require () function does, how it works, and when you can use it in Node.js.

Aug 28, 2024 · To import a module, you just need to call require() and assign the result: The first example imports a local module file. The second imports the Node.js "fs" core module. You can call require from anywhere in your code. And you can assign any variable name you want to the imported module.

Apr 18, 2017 · require () is not part of your standard JavaScript. In context to your question and tags, require () is built into Node.js to load modules. The module you are looking at is designed to run under NodeJS (which has native support for require) and not in a browser.

For a module to access another module's exports or module.exports, it must use require(). In your code, var pg = require('pg'); loads the pg module, a PostgreSQL client for Node.js.

Feb 28, 2012 · The module loading mechanism in Node.js is caching the modules on the first require call. It means that every time you use require('xyz-module') you will get the same instance of xyz-module, which ensures that the modules are singleton-like and have the same state across your application.

Apr 24, 2019 · In short, if a file wants to import something it has to declare it using the following syntax: require('idOrPathOfModule'); While exporting something from a module, you can use any valid identifier. It is not mandatory that you need to give the exact name of the variable/function as the key of the property added to module.exports object.

The require() function is a core piece of functionality in Node.js for importing JavaScript modules. While ECMAScript modules (ESM) and the import syntax are becoming more popular, require() and CommonJS modules remain the backbone of most Node.js applications.

Mar 19, 2017 · Node uses two core modules for managing module dependencies: The require module, which appears to be available on the global scope — no need to require('require'). The module module, which also appears to be available on the global scope — no need to require('module').

Jun 3, 2023 · Introduction to the require () function. The require() function is an integral part of the CommonJS module system, which is used in Node.js for managing dependencies and modularizing code. The function allows you to include and use external modules or files in your JavaScript code, which helps keep your code organized and maintainable.

The require () method, a built-in CommonJS module function that Node.js supports, is how you add modules to your project. The reason for this is that by default, Node.js treats JavaScript code as CommonJS modules.