What is the concept of MEAN stack?

The MEAN stack is a full-stack web development framework that consists of four main components, each representing a different layer of the application development stack. The MEAN stack is entirely based on JavaScript, and its name is derived from the initials of its components: MongoDB, Express.js, Angular, and Node.js. Here's a brief overview of each component:

1. MongoDB:

   • Database Layer: MongoDB is a NoSQL database that stores data in a flexible, JSON-like format called BSON (Binary JSON). It is designed to handle large amounts of unstructured data and provides high scalability. MongoDB is used as the database layer in the MEAN stack.

2. Express.js:

   • Back-End (Server) Layer: Express.js is a minimal and flexible Node.js web application framework that provides a set of features for building web and mobile applications. It simplifies the process of creating robust and scalable server-side applications by providing a lightweight, unopinionated framework. Express.js is used as the back-end or server-side layer in the MEAN stack.

3. Angular (or AngularJS):

   • Front-End (Client) Layer: Angular, developed and maintained by Google, is a powerful front-end framework for building dynamic, single-page web applications (SPAs). It follows a component-based architecture, offering features like two-way data binding, dependency injection, and a modular structure. AngularJS (Angular 1.x) was the original version, while Angular (2 and later) is a complete rewrite with enhanced features. Angular is used as the front-end or client-side layer in the MEAN stack.

4. Node.js:

   • Runtime Environment: Node.js is a JavaScript runtime built on the V8 JavaScript engine. It allows developers to execute JavaScript code on the server side, enabling the development of scalable and high-performance server-side applications. Node.js is used as the runtime environment in the MEAN stack, facilitating server-side scripting with JavaScript.

In summary, the MEAN stack leverages JavaScript throughout the entire web development process, from the server-side to the client-side and the database layer. It provides a full-stack solution for building modern and dynamic web applications, offering benefits such as a unified language (JavaScript), modularity, and scalability. Developers can use the MEAN stack to create responsive and interactive applications with a consistent and streamlined development experience.