Node.js started life as an implementation of JavaScript found in the Google Chrome browser that is optimized for event-driven, non-blocking I/O applications. Originally, Node.js found favor in organizations that needed to build real-time applications to manage distributed devices such as routers and switches. But as Node.js has evolved, it has also been widely adopted to build both mobile computing applications and applications for the Internet of Things (IoT). The reason: Node.js makes it possible to use JavaScript in a server-side way that allows applications to scale.
