npm / @rspack/dev-server

@rspack/dev-server

What changed in @rspack/dev-server 1 to 2, from its official release notes, upgrade guides and advisories. Sources checked 2026-10-18.

14 breaking1 new APIs and options4 tooling3 fixes and other

See which of these apply to your code, ranked, in your agent:

npx @unstale/cli init

@rspack/dev-server 219 changes

Default HPM logging is reduced.
2.2.0release notes
The default IPC socket was renamed.
2.1.0release notes
The bonjour feature has been removed.
2.0.0release notes
The bypass option is no longer supported after the http-proxy-middleware update.
2.0.0release notes
connect replaces express as the default server.
2.0.0release notes
Functionality provided by serve-index has been removed.
2.0.0release notes
The internalIP methods have been removed.
2.0.0release notes
The path option is no longer supported after the http-proxy-middleware update.
2.0.0release notes
The package is now pure ESM, affecting how it can be imported and used.
2.0.0release notes
selfsigned is now an optional peer dependency.
2.0.0release notes
The serve-index dependency and its related functionality have been removed.
2.0.0release notes
SockJS support has been removed.
2.0.0release notes
SPDY support has been removed.
2.0.0release notes
The webpack-prefixed serve environment variable was replaced with RSPACK_SERVE.
2.0.0release notes

The package's peer dependency range was updated, which may affect compatibility when installing it alongside peer dependencies.
2.1.0release notes
The dev server now prints URL logs in the Rsbuild style.
2.0.0release notes
@rspack/dev-server v2 is designed for Rspack v2.
2.0.0release notes

Bundles ws types in declarations, making them available to consumers of the package declarations.
2.0.1release notes