This talk is a comprehensive guide to building Progressive Web Applications with React. We will begin by introducing the concept of PWAs and highlighting the benefits they offer, including offline capabilities, fast loading times, and app-like experiences. We will then delve into the core principles and features of React, showcasing how it can be leveraged to create high-performing PWAs. We will cover the implementation of service workers, which enable offline access and background synchronization, allowing users to interact with your application even without a stable internet connection. We will explore caching strategies to optimize the performance of PWAs, ensuring quick and reliable access to cached resources.