MongoDB: MongoDB is a cross-platform document-oriented database program. It is a NoSQL Database. The data is stored in JSON document format and this database can store images in Base64 encoded format. More information on MongoDB can be read from this link.
Express.js: This is a Web Application Framework for Node.js. We can use this for building REST APIs and also for building Web Applications. More information on Express.js can be read from this link.
React.js makes it painless to create modern front-end applications. This library provides an easy approach for building interactive views. Node.js: This is an open-source, cross-platform JavaScript runtime environment used to run JavaScript code out-of-browser. We use Node.js for server-side JavaScript execution. More information can be read from this link.
The Component is a major building block of a React.js application. Component is the object that contains data, logic and user interface (UI) for the View. We can build an application with complex Views using React.js components.
In JavaScript full stack applications, we can use JavaScript object model for End-to-End apps that varies from UI to Database. We use MongoDB, Express.js, React.js and Node.js for designing such applications, which are collectively also knows as MERN apps. In this article, we will build a complete JavaScript application based on MERN a.k.a the MERN stack.