Hot Module Replacement is Easy

Hot Module Replacement (HMR) allows for updating code without refreshing the page, which enhances developer experience with faster iteration. This post explains the intricacies of how HMR works in Vite, including its lifecycle APIs like `import.meta.hot.accept()`, `dispose()`, `prune()`, and `invalidate()`. The process involves detecting file changes, passing them through Vite plugins, invalidating modules, and managing HMR propagation. The post also covers how the Vite HMR client handles WebSocket connections, processes HMR payloads, and integrates with the HMR API.