MEAN STACKS
The MEAN stack is JavaScript-based framework for developing web applications. MEAN is named after MongoDB, Express, Angular, and Node, the four key technologies that make up the layers of the stack.
Express
Angular
Node
MERN STACKS
The MERN stands for MongoDB, Express, React, Node, after the four key technologies that make up the stack.The MERN architecture allows you to easily construct a 3-tier architecture (frontend, backend, database) entirely using JavaScript and JSON.