What are MEAN and MERN?
MEAN and MERN is two sets of JavaScript Based web technologies that are used in full-stack web development. Each letter in each word symbolizes one technology.
What is MERN?
M - MongoDB | E - Express.js | R - React | N - Node.js
What is MEAN?
M - MongoDB | E - Express.js | A - Angular | N - Node.js
React - React is a front-end, open-source JavaScript library used to build complex user interfaces, which is developed and maintained by the Facebook company.
Angular - Angular is a front-end, open-source TypeScript (TypeScript is ES6 version of JavaScript plus a few other TypeScript only features which Angular needs) based web application framework, which is developed by the Angular Team at Google.
Node.js - Node.js is an open-source, cross-platform, backend, JavaScript runtime environment, which is developed by OpenJS Foundation. It helps to execute JavaScript outside the web browsers.
Express.js - Express or Express.js is an open-source(under the MIT License), back-end framework for Node.js, which is used to develop web applications and APIs. It is recognized as the facto standard server framework for Node.js.
MongoDB - MongoDB is a NoSQL, cross-platform, document-oriented database platform which is developed by MongoDB inc.
These are the core technologies that are associated with MERN and MEAN stacks. Choosing a suitable stack is a critical fact when comes to web development. Developers should match their requirements with tools/technologies and should select the best tool/technology set for them.