Node.js
Node.js (Node for short), which was developed in 2009 by Ryan Dahl, is the most popular out-of-browser JavaScript engine. Node is an open source, cross-platform JavaScript runtime environment that was based on Chrome's V8 JavaScript engine. It is used to run JavaScript code outside of the browser for non-client, side applications.
Like Google's V8 JavaScript engine in Chrome, Node.js uses a singly-threaded, event-driven, asynchronous architecture. It allows developers to use JavaScript's event-driven programming style to build web servers, services, and CLI tools. As discussed in Chapter 2, Asynchronous JavaScript, JavaScript is a non-blocking and event-driven programming language. JavaScript's asynchronous nature (a single-threaded event loop), along with Node's lightweight design, allows us to build very scalable network applications without worrying about threading.
Note
As discussed in Chapter 2, Asynchronous JavaScript, JavaScript...