React Native is an open-source mobile application framework created by Facebook. It is used to develop applications for Android, iOS, Web and UWP by enabling developers to use React along with native platform capabilities. React Native applications are written using JavaScript and React, the popular open-source library created by Facebook.
React Native works by using JavaScript code to bridge the gap between a mobile device’s native UI and the application’s UI. This bridge allows developers to write code that can access native platform features, such as camera, GPS, and more, while still maintaining the same UI across all platforms.
For example, a React Native application could be written to allow a user to take a picture with their camera, and then share it with friends on social media. The same code could be used on both Android and iOS devices, allowing the application to be developed quickly and efficiently.