Debug Node.js Applications Effectively

 

Overview of NodeJS

NodeJS is an asynchronous, event-driven runtime environment for JavaScript. It is cross-platform (works with Windows, Linux, Unix, Mac OS X, and other systems), lightweight, effective, and freely accessible to everybody. JavaScript code is executed on the server side by NodeJS to create dynamic web page content.

It is based on the V8 JavaScript Engine for Chrome. NodeJS can add, remove, and update data in your database and is used to build dynamic web pages. Using NodeJS, you can create dynamic http servers outside of the browser using your JavaScript expertise. Asynchronous APIs, a lightning-fast engine, a single threaded model, and no buffering are just a few of the fascinating characteristics of NodeJS.

How to Write NodeJS Code

Let’s begin writing NodeJS code. Create a JavaScript file and launch NodeJS. An application using NodeJS requires three parts. Let’s explore this now

Importing necessary modules: The NodeJS module is loaded using the need directive.

var http = require(“http”);

The returned HTTP instance will be kept in this http variable.

Creating a server instance: A server instance is made using the HTTP.createServer() function.

Request/Response: Your local machine address will receive the response. Here is a comprehensive NodeJS Hello World example.

The hello world file should have a JavaScript extension. Open the NodeJS command prompt now and type

The server operating message will be displayed on the terminal via node helloWorld.js.

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