How to Add App Icon Badge Notifications in React Native

App icon notification badges are dynamic UI elements in Android and iOS applications that display real-time updates, such as unread messages or user activity, using tools like PubNub for real-time functionality. This tutorial guides users through the process of integrating these badges into a React Native application, specifically a Facebook Messenger clone, by setting up a development environment with tools like Visual Studio Code, Xcode, and Android Studio. It details how to use React Native libraries, such as React Native Elements and React Navigation, to build and style the application, and how to implement real-time updates with PubNub by subscribing to channels and using presence information. The tutorial provides step-by-step instructions for setting up the project structure, creating navigation components, and incorporating badge functionality, with access to the final application code available on GitHub for further exploration.

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