vite-impl-optimization

Speed up Vite dev server startup by configuring dependency pre-bundling to convert CJS to ESM and reduce HTTP requests. You can explicitly include heavy dependencies in optimizeDeps to achieve faster and deterministic startup behavior.

Vite handles dependency pre-bundling for monorepo linked packages through automatic discovery and explicit optimizeDeps configurations. Managing these options properly prevents cache invalidation issues and ensures linked dependencies are processed correctly during development.

The difference between esbuild and Rolldown for Vite optimizeDeps lies in their configuration approaches for production prep. This guidance covers cross-version differences, allowing you to specify rolldownOptions to achieve deterministic pre-bundling behavior across different Vite versions.

Vite cache invalidation can break dynamic imports due to unmanaged pre-bundling behavior. Configuring optimizeDeps options like force, include, and holdUntilCrawlEnd ensures deterministic pre-bundling and prevents unexpected cache clearing during development.

Force Vite to re-bundle dependencies and ignore the cache by setting optimizeDeps.force to true in your configuration. This clears the existing cache and rebuilds dependencies, which is useful when troubleshooting stale pre-bundling issues.