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Introduction.................................................................................................................................x HTML and CSS..........................................................................................................................x Javascript.................................................................................................................................x Node.................................................................................................................................x React.................................................................................................................................x Mongo Database.................................................................................................................................x Firebase Database.................................................................................................................................x Bibliography....

  Firebase   is a platform for web and mobile application development and provides a range of services and tools to developers so that they can create high-end apps, enhance their user base, and earn more revenue. Firebase has two types of databases that are as follows. Real-Time database The Cloud Firestore This article will explore the differences and similarities between these two database options. It aims to help you to make a more bold decision to select the correct database. Here is summary of what you will learn reading this article: Overview of a Realtime Database Benefits of the Realtime implementation Firebase Database Options The Real Time Database Cloud Firestore Similarities Differences Want to know more? Please continue reading. Considering that both Firebase and The Realtime Database deliver realtime updates, let’s understand first the benefits of using a realtime updates for your application. What is a Realtime Database?  A database system that makes use of real-time pr

5) MongoDB  MongoDB is a cross-platform, document oriented database that provides, high performance, high availability, and easy scalability. MongoDB works on concept of collection and document. Database Database is a physical container for collections. Each database gets its own set of files on the file system. A single MongoDB server typically has multiple databases. Collection Collection is a group of MongoDB documents. It is the equivalent of an RDBMS table. A collection exists within a single database. Collections do not enforce a schema. Documents within a collection can have different fields. Typically, all documents in a collection are of similar or related purpose. Document A document is a set of key-value pairs. Documents have dynamic schema. Dynamic schema means that documents in the same collection do not need to have the same set of fields or structure, and common fields in a collection's documents may hold different types of data. 5.1) features of mongodb Rich JSON Do

4)  react React makes it painless to create interactive UIs. Design simple views for each state in your application, and React will efficiently update and render just the right components when your data changes. 4.1) Component-Based Build encapsulated components that manage their own state, then compose them to make complex UIs. Since component logic is written in JavaScript instead of templates, you can easily pass rich data through your app and keep state out of the DOM. 4.2) Learn Once, Write Anywhere We don’t make assumptions about the rest of your technology stack, so you can develop new features in React without rewriting existing code. React can also render on the server using Node and power mobile apps using  React Native . 4.3) A Simple Component React components implement a  render()  method that takes input data and returns what to display. This example uses an XML-like syntax called JSX. Input data that is passed into the component can be accessed by  render()  via  this.pr