Vite · Part 5 — HMR Deep Dive
How Hot Module Replacement swaps a single module without losing state: the import.meta.hot API, HMR boundaries and propagation, why some edits trigger a full reload, and framework Fast Refresh. With an HMR boundary lab.
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Webpack · Part 5 — Dev Server, HMR & Source Maps
The fast feedback loop: webpack-dev-server, Hot Module Replacement that preserves state, and choosing the right devtool source-map mode for development vs production. With an interactive HMR and source-map lab.