What is MEAN?

MEAN is a full-stack JavaScript framework that consists of four main components: MongoDB, Express.js, AngularJS, and Node.js. Each component plays a specific role in the development process, and together they provide a robust and scalable platform for building web applications.

One of the main advantages of using MEAN is that it allows developers to use a single language, JavaScript, throughout the entire development process. This makes it easier to switch between front-end and back-end development, as well as to collaborate with other developers who may have different skill sets. Additionally, MEAN is open-source and has a large community of developers who contribute to its development and provide support.

Here's an example of how MEAN can be used to build a simple web application. Let's say we want to build a todo list application. We would start by creating a MongoDB database to store our todo items. We would then use Express.js to create a RESTful API that allows us to create, read, update, and delete todo items from the database. Next, we would use AngularJS to create a user interface that allows users to interact with the API and display the todo items. Finally, we would use Node.js to run the application on a server.