MEAN-Stack

A JavaScript stack used for building dynamic web applications on MongoDB, Express.js, Angular, and Node.js is referred to as the "MEAN”.

MongoDB is an open-source document-oriented NoSQL database. Documents are stored in a flexible way such as JSON and are used for data storage and retrieval in MEAN applications.

Angular is the front-end framework for building single-page applications (SPAs) with a rich user interface that supports two-way data binding.

Node.js is a JavaScript runtime that executes server-side code, implementing backend services to respond to requests in MEAN applications.

Express.js is a web-based framework for the Node.js framework, powering the routing and middleware and setting up APIs: tasks that are crucial for backend services within MEAN.

It stores necessary project data for metadata, dependencies, scripts, and configurations and is therefore required for managing Node.js applications.

Angular handles the front end; the back end is served by Node.js and Express, and the data is stored in MongoDB, all interfaced by RESTful APIs.

RESTful APIs are a standardized interface to web-based services, and Express.js helps create and manage APIs in MEAN apps.

Angular is a full-fledged framework having more built-in features, while React is a library that focuses on the view layer and is more flexible.

Error handling in Node.js uses try-catch blocks, along with error middleware, whereas debugging can be performed by logging or using other debugging tools such as Node Inspector.