Svelte HMR Core Utilities

svelte-hmr provides the core logic and utilities for implementing Hot Module Replacement (HMR) in Svelte 3 and 4 applications. It is not an end-user bundler plugin itself, but rather a foundational package leveraged by bundler-specific plugins (e.g., for Rollup, Webpack, Vite) to enable seamless development experiences. The package is currently stable at version `0.16.0` and receives updates as Svelte itself evolves or HMR patterns improve, typically releasing patch and minor versions on an as-needed basis rather than a strict schedule. Key differentiators include its bundler-agnostic design, robust state preservation mechanisms (both component and local variable state), and intelligent CSS injection capabilities, offering a consistent HMR experience across different build tools without needing full page reloads.