BuildConfig.minChunkSize

With splitting, chunks that are always loaded together are folded into one (for example, code shared by an entry point and a module it import()s lives in the entry point's chunk). This option additionally folds chunks whose combined source size is below this many bytes and whose modules have no top-level side effects into a chunk loaded by a superset of their importers, so fewer modules are loaded at runtime. Nothing lazy becomes eager and no side effect runs earlier; the chunk that absorbs a folded chunk exports the symbols other chunks import from it. Requires splitting: true. CLI: --min-chunk-size.