What is Node.js?

Node.js is an open-source, cross-platform JavaScript runtime environment that operates on Google Chrome's V8 JavaScript engine. Node.js is used to execute JavaScript code outside of a web browser and allows developers to use JavaScript to write command line tools for server-side scripting to create dynamic web page content before it is sent to the user's browser. Node.js allows developers to create a JavaScript-based paradigm for web, blockchain, and application development that unifies an individual programming language instead of using different languages to create frontend and backend scripts.