How Vitest’s Vite Dev Server Delivers Instant Test Feedback
Vitest’s default watch mode launches a Vite dev server, giving tests instant HMR feedback without extra configuration.
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Vitest’s default watch mode launches a Vite dev server, giving tests instant HMR feedback without extra configuration.
Stop waiting for full page reloads. Learn how Vite uses native ES Modules to decouple the module graph and enable lightning-fast Hot Module Replacement.
Learn how Vite’s native ES module serving eliminates bundling in development, giving near‑instant start and precise Hot Module Replacement, with a concrete setup example and notes on browser support and monorepo considerations.
Vite serves source as native ES modules, eliminating dev-time bundling. HMR updates only the changed module chain, preserving state. Trade-off: first-run dependency pre-bundling can be slow for large projects.
Learn how to configure Vite's HMR for Docker and WSL2 to prevent full page reloads and maintain application state during development.
Vite's speed comes from two decisions: serving source as native ES modules and pre-bundling dependencies once. Here's how both work, how to verify them, and where they break down.
An architecture note on Vite's HMR: why serving native ES modules instead of a bundle makes updates near-instant, where the trust boundaries sit, and the circular-import and dev/prod divergence failure modes to watch for.
A concise architecture note that explains what Vite’s HMR needs, how it is built, where trust is enforced, how it operates, and when it falls back to a full reload.
A step‑by‑step diagnostic guide for Vite.js HMR failures: symptoms, cause table, ordered checks, fixes, and when to escalate.