Node.js is an open-source, cross-platform, JavaScript runtime environment that executes JavaScript code outside of a browser. Node.js lets developers use JavaScript to write command line tools and for server-side scripting—running scripts server-side to produce dynamic web page content before the page is sent to the user’s web browser. Consequently, Node.js represents a “JavaScript everywhere” paradigm, unifying web-application development around a single programming language, rather than different languages for server- and client-side scripts. Though .js is the standard filename extension for JavaScript code, the name “Node.js” doesn’t refer to a particular file in this context and is merely the name of the product. Node.js has an event-driven architecture capable of asynchronous I/O. These design choices aim to optimize throughput and scalability in web applications with many input/output operations, as well as for real-time Web applications. The Node.js distributed development project, governed by the Node.js Foundation, is facilitated by the Linux Foundation’s Collaborative Projects program. Corporate users of Node.js software include GoDaddy, Groupon, IBM, LinkedIn, Microsoft, Netflix, PayPal, Rakuten, SAP, Voxer, Walmart, and Yahoo!.

What Can We Do With Node.Js ?

  • Package management through npm, bower, jspm, etc.
  • Development tooling (module management with webpack, task running and automation through grunt or gulp, linters like eslint or jslint, etc)
  • Creation of back-end web applications.
  • Command line tools like rimraf.
  • Desktop applications.

Use Cases for Node.Js

  • Real-time applications

           Collaborative apps (Trello, Google Docs), live-chat, instant-messaging, and online gaming are all examples of                 RTAs that benefit from a Node.js architecture. These applications function within a time frame that the users                 sense as immediate and current. Node.js specifications are the solution for the low-latency needed for these                  programs to work efficiently. It facilitates handling multiple client requests, enables reusing packages of                          library code and the data sync between the client and the server happens very fast.

  • Single page applications

            SPAs are web apps that load a single HTML page and dynamically update that page as the user interacts with                the app. Much of the work happens on the client side, in JavaScript. Even though these are an awesome                          evolution in web development, they come with some problems when it comes to rendering. This can negatively              affect your SEO performance for instance. Server-side rendering in a Node.js environment is a popular option                 to solve this.

  • Scalability

            Node.js won’t ever get bigger than you need it to be. The beauty of it is that it’s minimalist enough to customize              depending on the use case. Performance-wise, that’s key. Even its name emphasizes that it’s made to                              assemble multiple small distributed nodes communicating with each other. Node’s modularity allows you to                  create small apps without having to deal with a bloated, overkill ecosystem. You choose the tools you need for              the job and then scale as needed.             

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