Sharing code with React Native for Web

React Native for Web is an open-source project designed to facilitate the use of React Native core components in web applications, allowing developers to share code between mobile and web platforms by utilizing React DOM to render JavaScript compatible with React Native in a browser. The tutorial outlines a step-by-step process to set up a React web app using Parcel, create components with React Native core components, and share them between mobile and web applications. The process involves creating a new React Native app with npx, setting up a web app with Parcel, and establishing a shared components directory to ensure seamless integration and code reuse. The guide also highlights the compatibility of React Native for Web with various React Native APIs and emphasizes the benefits of using shared components to enhance development efficiency and reduce errors across platforms.