The components of the MEAN stack are as follows:
- MongoDB, a NoSQL database
- Express.js, a web application framework that runs on Node.js
- Node.js, an execution environment for event-driven server-side and networking applications
MEAN allows you to test an application on cloud platform easily after successful completion of a development process. Applications can be easily developed, tested and introduced in the cloud. It also allows you to add extra information simply by adding the field to your form. MongoDB, specifically designed for the cloud, provides full cluster support and automatic replication.