MEANjs

MEANjs, commonly written as MEAN.js, is a full-stack JavaScript framework designed to accelerate the development of web applications using the MEAN stack (MongoDB, Express.js, AngularJS, Node.js). It provides a modular, opinionated boilerplate and scaffolding that lets developers assemble a working application quickly while maintaining a consistent architecture.

The architecture centers on a Node.js/Express back end and an AngularJS front end, with MongoDB as the data store. Data modeling is typically handled with Mongoose, an ODM for MongoDB. The framework organizes code into modules (such as users, posts, and comments), with defined APIs and routes. It includes common features like user authentication and authorization, session management, and RESTful services, along with utilities for configuration, logging, testing, and deployment.

MEANjs emphasizes a maintainable project structure and testability, supporting development workflows that separate server-side and client-side concerns. It is commonly deployed as a standalone application skeleton or integrated into larger projects, and it integrates with standard JavaScript tooling and package management (npm).

The MEANjs ecosystem aims to standardize scaffolding and best practices across MEAN-based projects, aiding collaboration and onboarding for teams building single-page or progressive web applications.