What is the difference between NodeJS and Expressjs?

Node.js and Express.js are two of the most popular web development frameworks used today. Both are open-source, JavaScript-based frameworks that allow developers to quickly and easily create web applications. While they share many similarities, there are a few key differences that set them apart. Node.js is an open-source, cross-platform, JavaScript runtime environment built on Chrome’s V8 JavaScript engine. It is designed to build scalable network applications and is used for both server-side and client-side development. Express.js is a web application framework built on top of Node.js. It is designed to make building web applications more efficient and is especially useful for developing server-side applications. The primary difference between Node.js and Express.js is in their purpose. Node.js is used for building server-side applications, while Express.js is used for building web applications. Node.js handles the underlying functionality, while Express.js provides a framework for building web applications. Node.js is used for developing the server-side of applications and is generally used in conjunction with a database, while Express.js is used for developing the client-side of applications and is typically used with a front-end framework, such as React