Vite's dependency optimization feature is crucial for enhancing the performance of applications by pre-bundling dependencies. Here's an overview of the key options available under `optimizeDeps` in Vite:
Key Options for Dependency Optimization
1. optimizeDeps.entries
This option allows you to specify custom entry points for dependency pre-bundling. By default, Vite scans `.html` files to detect dependencies, but you can provide your own entries using a fast-glob pattern or an array of patterns. This overrides the default entries inference, which only ignores `node_modules` and `build.outDir` by default[1][2].2. optimizeDeps.include
You can use this option to force the inclusion of specific dependencies that are not automatically detected. This is particularly useful for linked packages not inside `node_modules`, ensuring they are pre-bundled[1][3].3. optimizeDeps.exclude
This option allows you to exclude certain dependencies from pre-bundling. It is important to note that excluding CommonJS dependencies is generally not recommended, as they may have nested dependencies that need to be included[1][2].4. optimizeDeps.disabled
This deprecated option can disable the optimizer during development or build time. To completely disable automatic dependency discovery, you can set `optimizeDeps.noDiscovery` to `true` while leaving `optimizeDeps.include` undefined[1][2].5. optimizeDeps.needsInterop
This experimental option forces ESM interop for specified dependencies. It can help avoid full-page reloads by ensuring that dependencies are bundled correctly[1][3].6. optimizeDeps.esbuildOptions
You can customize the behavior of the esbuild used during dependency scanning and optimization. This includes passing specific options to optimize the build process further[2][3].Caching and Performance
Vite caches pre-bundled dependencies in `node_modules/.vite`, which helps in reducing the need to re-run the pre-bundling step unless certain conditions change, such as updates to the package manager lockfile or modifications in the project configuration[3].By effectively utilizing these options, developers can significantly improve the performance of their Vite applications, ensuring that dependencies are managed efficiently and optimally during the development process.
Citations:[1] https://vitejs.dev/config/dep-optimization-options
[2] https://v3.vitejs.dev/config/dep-optimization-options.html
[3] https://vitejs.dev/guide/dep-pre-bundling
[4] https://github.com/remix-run/remix/discussions/8917
[5] https://stackoverflow.com/questions/77421774/vites-optimizedeps-include-doesnt-work-with-relative-paths