> For AI agents: the complete documentation index is available at /llms.txt, the full documentation bundle is available at /llms-full.txt.

# dev.hmr

- **Type:** `boolean`
- **Default:** `true`

Whether to enable Hot Module Replacement.

:::info
The usage of this configuration item is exactly the same as that of Rsbuild. For detailed information, please refer to [Rsbuild - dev.hmr](https://v2.rsbuild.dev/config/dev/hmr).
:::