"Express.js, commonly referred to as Express JS, is a fast, minimalist, and flexible web application framework for Node.js. It is designed to build single-page, multi-page, and hybrid web applications with ease. Express JS is widely used due to its lightweight nature, robust features, and ability to handle HTTP requests and middleware seamlessly.
Express.js, or simply Express, is a back end web application framework for building RESTful APIs with Node.js, released as free and open-source software under the MIT License. It is designed for building web applications and APIs. It has been called the de facto standard server framework for Node.js.
Originally developed by TJ Holowaychuk in 2010, Express JS has become one of the most popular frameworks in the Node.js ecosystem. It simplifies the process of building server-side applications and RESTful APIs by providing a thin layer of fundamental web application features without obscuring Node.js’s core functionality."