Requirements

• Express.js is built on top of Node.js, so you need to have Node.js installed on your system. You can download it from the official Node.js website (https://nodejs.org) and follow the installation instructions for your operating system.
• NPM (Node Package Manager) is typically installed along with Node.js. It is used to manage dependencies and install packages required for your Express.js project.
• Once you have Node.js and NPM set up, you can install Express.js by running the following command in your terminal or command prompt: Copy code npm install express This will install the Express.js package and its dependencies in your project directory.
• You will need a text editor or integrated development environment (IDE) to write your Express.js code. There are many options available, such as Visual Studio Code, Sublime Text, Atom, or WebStorm. Choose the one that suits your preferences.
• Express.js is platform-independent and can run on various operating systems like Windows, macOS, and Linux. Once you have met these requirements, you can start building your web applications using Express.js by creating an Express.js project, defining routes, adding middleware, and handling requests and responses.