Node.js is a free, open source tool that lets you run JavaScript outside the web browser. With Node.js, you can build fast and scalable applications like web servers, APIs, tools, and more. Connect your Node.js application to a MongoDB database and work with collections and documents. Learn Node.js and build fast server-side applications with JavaScript. Self-paced lessons and exercises. Exam and certificate included. What is the Timers Module? The Timers module provides functions that help schedule code execution at specific times or intervals. Unlike browser JavaScript, Node.js timing functions are provided as part of the Timers module, though they are available globally without requiring an explicit import. Key features include: Delayed execution with setTimeout () Repeated execution with setInterval. Get certified in Node.js. Online exam, 3 attempts, results right away. Pass and share your W3Schools certificate on LinkedIn. Upload Files Now you are ready to make a web page in Node.js that lets the user upload files to your computer: Step 1: Create an Upload Form Create a Node.js file that writes an HTML form, with an upload field: Modules are the building blocks of Node.js applications, allowing you to organize code into logical, reusable components. Core Concepts of Events in Node.js Every action on a computer is an event, like when a connection is made or a file is opened. Objects in Node.js can fire events, like the readStream object fires events when opening and closing a file: Raspberry Pi and Node.js The Raspberry Pi has a row of GPIO (General Purpose input/output) pins, and these can be used to interact in amazing ways with the real world. This tutorial will focus on how to use these with Node.js. What is Node.js? Node.js is a free, open-source JavaScript runtime that runs on Windows, Mac, Linux, and more. It lets you execute JavaScript code outside of a web browser, enabling server-side development with JavaScript. Built on Chrome's V8 JavaScript engine, Node.js is designed for building scalable network applications efficiently.