What you need to know! Basics and features of Node.js

What is Node.js?

Node.js is a JavaScript-based programming runtime environment. You can use it to handle asynchronous events, such as web servers, or to develop server-side applications. Node.js is extremely fast and highly scalable. It also comes with many modules and can be easily extended. Node.js is oriented towards asynchronous I/O, using callbacks and promises to allow many tasks to run at the same time. Node.js is cross-platform and supports major operating systems such as Windows, Mac, and Linux.


// Sample code that prints Hello, world! on the console
console.log("Hello, world!");

Features of Node.js

Node.js is an open source programming language used for server-side programming and is based on JavaScript. Its characteristics are asynchronous I/O processing, scalability, high-speed processing power and real-time communication ability. You can also use the built-in npm package manager to easily create scalable applications. Node.js is used to develop web applications, RESTful APIs, network applications, and more.

//Example of starting an HTTP server with Node.js
const http = require('http');

const hostname = '';
const port = 3000;

const server = http.createServer((req, res) => {
  res.statusCode = 200;
  res.setHeader('Content-Type', 'text/plain');
  res.end('Hello, World!\n');

server.listen(port, hostname, () => {
  console.log(`Server running at http://${hostname}:${port}/`);

So far, we have talked about the features of Node.js.

How to use Node.js

Node.js is a JavaScript runtime and a platform for running JavaScript server-side. By using Node.js, it is possible to build advanced web and network applications such as asynchronous I/O processing. Node.js’s fast execution and event-driven architecture make it very useful for building dynamic web applications and scalable services. Use the HTTP module when starting a web server with Node.js. It also uses a package manager called npm to manage dependencies. Node.js is an essential technology for server-side development and plays a key role in modern web application development.

Advantages of server-side development with Node.js

Node.js is a very fast JavaScript runtime, which makes it suitable for server-side development. This makes it easy to create various kinds of server-side applications such as WebAPIs and web applications. In addition, Node.js supports event-driven asynchronous processing, which makes efficient use of the CPU and achieves high scalability. Furthermore, Node.js has abundant libraries and frameworks, which can improve development efficiency. As described above, server-side development using Node.js has three major advantages: high speed, scalability, and development efficiency.

The future of Node.js

Node.js is a platform that allows you to run JavaScript on the server side. In recent years, the demand for web applications has increased, and the development method using Node.js is also attracting attention. Node.js has a very bright future. The reasons are as follows.

・Processing speed is improving due to speeding up ・There are many developers because JavaScript is a popular language and Node.js can be developed with JavaScript. ・The use in the cloud environment is increasing, and it is expected that the demand will continue to increase in the future.

Technological progress using Node.js is also expected. For example, it has features suitable for real-time applications such as WebSockets and streaming, so it is also used for IoT and chat applications. High growth potential is expected for Node.js in the future.


Node.js is a fast and scalable server-side development environment based on JavaScript, supporting the latest technologies such as asynchronous I/O processing and real-time communication functions. Node.js makes it easy to extend many modules, including the built-in npm package manager. In addition, there are abundant libraries and frameworks for development, and as speed increases, demand for use in cloud environments is expected to increase. Node.js has three major advantages of high speed, scalability, and development efficiency, and high growth potential is expected in the future.