ExpressJS is a Node.js web application framework that provides a robust set of features for web and mobile applications. It is one of the most popular web frameworks for Node.js, and is the foundation for many popular applications and websites. ExpressJS is known for its minimalistic approach and its focus on providing high performance and a robust set of features. It enables developers to quickly create web applications, APIs, and middleware. ExpressJS provides a wide range of features, including routing, middleware, template engines, and more. It also offers an easy-to-use API that allows developers to quickly create and deploy applications. ExpressJS also makes it easy to integrate with other web frameworks, such as Socket.io and MongoDB. Additionally, ExpressJS offers a number of plugins, such as authentication and authorization, to help developers quickly create powerful web applications and websites.
ExpressJS is the server-side code, while Durandal is for the client-side code.
Quick to learn and features a lean and performing architecture.