{"id":28369,"date":"2022-03-09T06:08:16","date_gmt":"2022-03-09T06:08:16","guid":{"rendered":"https:\/\/www.devopsschool.com\/blog\/?p=28369"},"modified":"2022-12-23T06:48:00","modified_gmt":"2022-12-23T06:48:00","slug":"what-is-node-js-and-how-it-works-an-overview-and-its-use-cases","status":"publish","type":"post","link":"https:\/\/www.devopsschool.com\/blog\/what-is-node-js-and-how-it-works-an-overview-and-its-use-cases\/","title":{"rendered":"What is Node.Js and How it works? An Overview and Its Use Cases."},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"626\" src=\"https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2022\/03\/Node.js_-1024x626.png\" alt=\"\" class=\"wp-image-28447\" srcset=\"https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2022\/03\/Node.js_-1024x626.png 1024w, https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2022\/03\/Node.js_-300x184.png 300w, https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2022\/03\/Node.js_-768x470.png 768w, https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2022\/03\/Node.js_.png 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What is Node.Js?<\/h2>\n\n\n\n<p>Node.js is an open-source and cross-platform runtime environment for executing JavaScript code outside a browser. Node.js is a JavaScript runtime environment.<br>It is used for server-side programming, and primarily deployed for non-blocking, event-driven servers.<br>It runs on the V8 engine and executes JavaScript code outside a web browser.<br>Node.js runs the V8 JavaScript engine, the core of Google Chrome, outside of the browser. This allows Node.js to be very performant. You need to remember that NodeJS is not a framework and it\u2019s not a programming language. Most people are confused and understand it\u2019s a framework or a programming language. We often use Node.js for building back-end services like APIs like Web App or Mobile App. It\u2019s used in production by large companies such as Paypal, Uber, Netflix, Walmart.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">History<\/h2>\n\n\n\n<p>Node.js was written initially by Ryan Dahl in 2009, about thirteen years after the introduction of the first server-side JavaScript environment, Netscape&#8217;s LiveWire Pro Web. The initial release supported only Linux and Mac OS X. Its development and maintenance was led by Dahl and later sponsored by Joyent.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Application of Node.JS:<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Real-Time Chats<\/li><li>Complex Single-Page applications<\/li><li>Real-time collaboration tools<\/li><li>Streaming apps<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What Is Node.js Written In?<\/h2>\n\n\n\n<p>Node.js is written in C, C++, and JavaScript.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Features of Node.JS:<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>It\u2019s easy to get started and can be used for prototyping and agile development<\/li><li>It provides fast and highly scalable services<\/li><li>It uses JavaScript everywhere, so it\u2019s easy for a JavaScript programmer to build back-end services using Node.js<\/li><li>Source code cleaner and consistent.<\/li><li>Large ecosystem for open source library.<\/li><li>It has Asynchronous or Non-blocking nature.<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"620\" height=\"360\" src=\"https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2022\/03\/code.png\" alt=\"\" class=\"wp-image-28448\" srcset=\"https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2022\/03\/code.png 620w, https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2022\/03\/code-300x174.png 300w\" sizes=\"auto, (max-width: 620px) 100vw, 620px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Advantages of Node.JS:<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Easy to learn and code: <\/strong>Node.Js is easy to learn and code because it uses JavaScript. If you are a front-end developer and have a good grasp of JavaScript you can easily<\/li><li><strong>Easy Scalability: <\/strong>It is easily scaling the application in both horizontal and vertical directions. We can also add extra resources during the scalability of the application.<\/li><li><strong>Real-time web apps:<\/strong> If you are building a web app you can also use PHP, and it will take the same amount of time when you use Node.js, But if I am talking about building chat apps or gaming apps Node.js is much more preferable because of faster synchronization. Also, the event loop avoids HTTP overloaded for Node.js development.<\/li><li><strong>Fast Suite:<\/strong> Node.Js runs on the V8 engine developed by Google. Event loop in NodeJs handles all asynchronous operation so Node.Js acts like a fast suite and all the operations can be done quickly like reading or writing in the database, network connection, or file system<\/li><li><strong>Advantage of Caching:<\/strong> It provides the caching of a single module. Whenever there is any request for the first module, it gets cached in the application memory, so you don\u2019t need to re-execute the code.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Components of Node.js:<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Node CLI<\/li><li>NPM<\/li><li>json<\/li><li>Node Modules<\/li><li>Development Tools and Frameworks<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Architecture:<\/h2>\n\n\n\n<p><strong>Requests:<\/strong> Depending on the actions that a user needs to perform, the requests to the server can be either blocking (complex) or non-blocking (simple).<br><strong>Node.js Server:<\/strong> The Node.js server accepts user requests, processes them, and returns results to the users.<br><strong>Event Queue:<\/strong> The main use of Event Queue is to store the incoming client requests and pass them sequentially to the Event Loop.<br><strong>Thread Pool:<\/strong> The Thread pool in a Node.js server contains the threads that are available for performing operations required to process requests.<br><strong>Event Loop:<\/strong> Event Loop receives requests from the Event Queue and sends out the responses to the clients.<br><strong>External Resources:<\/strong> In order to handle blocking client requests, external resources are used. They can be of any type ( computation, storage, etc).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Alternative NodeJS<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>PERL<\/li><li>ELIXIR<\/li><li>ASP.NET<\/li><li>CEYLON<\/li><li>REBOL<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">latest version <\/h2>\n\n\n\n<p>16.14.0<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Founder of company<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>Ryan Dahl<\/p><\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">Official website<\/h2>\n\n\n\n<p><a href=\"https:\/\/nodejs.org\/en\/\" target=\"_blank\" rel=\"noopener\">https:\/\/nodejs.org\/en\/<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Best Resources, Tutorials and Guide for Nodejs<\/h2>\n\n\n\n<figure class=\"wp-block-embed is-type-rich is-provider-embed-handler wp-block-embed-embed-handler wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Node Js Tutorial in Hindi \ud83d\udd25\ud83d\udd25\" width=\"720\" height=\"405\" src=\"https:\/\/www.youtube.com\/embed\/BLl32FvcdVM?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><br><a href=\"https:\/\/www.devopsschool.com\/blog\/top-50-node-js-interview-questions-and-answers\/\">Interview Questions and Answer<\/a><\/h2>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Best Courses and Insitute for learning<\/strong><\/h2>\n\n\n\n<p>If you want certification course for such top course. So please visit \u201c<a href=\"https:\/\/www.devopsschool.com\/\"><strong>DevopsSchool.Com<\/strong><\/a>\u201d. You will find more certification courses here.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2022\/02\/logo-2.png\" alt=\"\" width=\"832\" height=\"210\" \/><\/figure>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>What is Node.Js? Node.js is an open-source and cross-platform runtime environment for executing JavaScript code outside a browser. Node.js is a JavaScript runtime environment.It is used for server-side programming, and primarily deployed for non-blocking, event-driven servers.It runs on the V8 engine and executes JavaScript code outside a web browser.Node.js runs the V8 JavaScript engine, the&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","_joinchat":[],"footnotes":""},"categories":[2],"tags":[7547,5449,7548,7546,7224],"class_list":["post-28369","post","type-post","status-publish","format-standard","hentry","category-uncategorised","tag-alternative-of-node-js","tag-devopsschool","tag-features-of-node-js","tag-node-js-prigramming-language","tag-node-js"],"_links":{"self":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/28369","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/comments?post=28369"}],"version-history":[{"count":2,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/28369\/revisions"}],"predecessor-version":[{"id":28451,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/28369\/revisions\/28451"}],"wp:attachment":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/media?parent=28369"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/categories?post=28369"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/tags?post=28369"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}