Node.js is a platform for easily creating fast and scalable network applications that is built on Chrome's JavaScript runtime. Node.js is a JavaScript runtime that is designed to build scalable network applications... Because there are no locks, Node.js users are not concerned about deadlocking the process. Because almost no function in Node.js performs I/O directly, the process never blocks unless the I/O is performed using synchronous methods from the Node.js standard library. Scalable systems are very reasonable to develop in Node frameworks because nothing blocks them.