SWR is a React Hooks library for data fetching that implements the stale-while-revalidate cache strategy. It provides a set of hooks (useSWR, useSWRInfinite, useSWRImmutable, useSWRSubscription, useSWRMutation) that enable efficient client-side data fetching with automatic caching, deduplication, revalidation on focus, interval polling, and optimistic updates. The library is designed as a standalone npm package with a modular internal architecture, featuring a middleware system for extensibility, a configurable cache provider, and built-in support for React Suspense and server-side rendering. It is widely used in production and actively maintained by Vercel.
Yet Another Surge Dashboard (YASD) is a React 19 single-page application for managing and monitoring Surge network proxy instances through their HTTP API. The application provides a web-based interface to configure Surge instances, view network traffic statistics, manage profiles and rules, and inspect request logs. Built with a modern tech stack including Vite, TypeScript, Redux Toolkit, SWR for data fetching, and shadcn/ui for components, it features internationalization (English/Chinese), mobile responsiveness, and PWA capabilities. The architecture follows React best practices with clear separation of concerns between components, hooks, state management, and API layers.