WHAT IS NODE.JS

Node.js?is a?cross-platform,?open-source?server environment that can run on?Windows,?Linux,?Unix,?macOS, and more. Node.js is a?back-end?JavaScript?runtime environment, runs on the?V8?JavaScript Engine, and executes JavaScript code outside a?web browser.

Node.js lets developers use JavaScript to write command line tools and for?server-side scripting. The ability to run JavaScript code on the server is often used to generate?dynamic web page?content before the page is sent to the user's web browser. Consequently, Node.js represents a "JavaScript everywhere" paradigm,[6]?unifying?web-application?development around a single programming language, as opposed to using different languages for the server- versus client-side programming.

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 (e.g.,?real-time communication?programs and?browser games).[7]

The Node.js?distributed development?project was previously governed by the Node.js Foundation,[8]?and has now merged with the?JS Foundation?to form the?OpenJS Foundation. OpenJS Foundation is facilitated by the?Linux Foundation's Collaborative Projects program.[9]

Corporate users of Node.js software include?GoDaddy,[10]?Groupon,[11]?IBM,[12]?LinkedIn,[13][14]?Microsoft,[15][16]?Netflix,[17]?PayPal,[18][19]?SAP,[20]?Walmart,[21]?Yahoo!,[22]?and?Amazon Web Services.[23]