# rspack v2.2.1

- Product: rspack (https://whatsnew.fyi/product/rspack)
- Vendor: rspack
- Date: 2026-08-27
- Version: v2.2.1
- Original notes: https://github.com/web-infra-dev/rspack/releases/tag/v2.2.1
- Permalink: https://whatsnew.fyi/product/rspack/releases/v2.2.1

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **fixed** — Correct compact hashed module and chunk IDs naming from compat-hashed to compact-hashed, with deprecated compatibility aliases maintained for backward compatibility
- **added** — Align wasmStreamingFallback with webpack
- **added** — Track dependencies in loader cache
- **changed** — Store FactorizeInfo path dependencies as compact slices
- **fixed** — Disable stats logging by default
- **fixed** — Disable incremental outside development mode
- **fixed** — Run afterCompile before shouldEmit and asset emission
- **fixed** — Clear stale issuer updates between rebuilds
- **fixed** — Exclude asset output path from URLs in CSS
- **fixed** — Bound concurrent asset writes during emit
- **fixed** — Update swc_ecma_minifier to 61.0.4
- **fixed** — Store server compiler ID in native coordinator
- **fixed** — Persist dependency id in metadata
- **fixed** — Normalize restored paths on Windows

##### Highlights

###### Corrected `compact-hashed` IDs naming

Rspack 2.2.0 introduced compact hashed module and chunk IDs under the mistakenly named `compat-hashed` option and `CompatHashedModuleIdsPlugin` / `CompatHashedChunkIdsPlugin` APIs. Rspack 2.2.1 corrects these names to `compact-hashed`, `CompactHashedModuleIdsPlugin`, and `CompactHashedChunkIdsPlugin`.

The names introduced in 2.2.0 remain available as deprecated compatibility aliases, but we recommend upgrading to Rspack 2.2.1 and using the corrected names:

```js
module.exports = {
  optimization: {
    moduleIds: 'compact-hashed',
    chunkIds: 'compact-hashed',
  },
};
```

##### What's Changed
###### New Features 🎉
* feat(wasm): align wasmStreamingFallback with webpack by @CoderSerio in https://github.com/web-infra-dev/rspack/pull/15334
* feat: track dependencies in loader cache by @intellild in https://github.com/web-infra-dev/rspack/pull/15325
###### Performance 🚀
* perf(core): store FactorizeInfo path dependencies as compact slices by @stormslowly in https://github.com/web-infra-dev/rspack/pull/15306
###### Bug Fixes 🐞
* fix(cli): disable stats logging by default by @hardfist in https://github.com/web-infra-dev/rspack/pull/15328
* fix: disable incremental outside development mode by @hardfist in https://github.com/web-infra-dev/rspack/pull/15332
* fix(core): run afterCompile before shouldEmit and asset emission by @kakiuwang-ui in https://github.com/web-infra-dev/rspack/pull/15326
* fix(cache): clear stale issuer updates between rebuilds by @zhsama in https://github.com/web-infra-dev/rspack/pull/15276
* fix(css): exclude asset output path from URLs by @LingyuCoder in https://github.com/web-infra-dev/rspack/pull/15315
* fix(core): bound concurrent asset writes during emit by @lazerg in https://github.com/web-infra-dev/rspack/pull/15342
* fix(minify): update swc_ecma_minifier to 61.0.4 by @LingyuCoder in https://github.com/web-infra-dev/rspack/pull/15343
* fix(ids): correct compact hashed API names by @LingyuCoder in https://github.com/web-infra-dev/rspack/pull/15356
* fix(rsc): store server compiler ID in native coordinator by @SyMind in https://github.com/web-infra-dev/rspack/pull/15307
* fix(cache): persist dependency id in metadata by @hardfist in https://github.com/web-infra-dev/rspack/pull/15345
* fix(cache): normalize restored paths on Windows by @hardfist in https://github.com/web-infra-dev/rspack/pull/15357
###### Refactor 🔨
* refactor(split-chunks): skip disjoint group cleanup by @LingyuCoder in https://github.com/web-infra-dev/rspack/pull/15318
###### Document 📖
* docs: 2.2.0 release blog by @stormslowly in https://github.com/web-infra-dev/rspack/pull/15240
* docs: clarify incremental mode requirement by @hardfist in https://github.com/web-infra-dev/rspack/pull/15339
* docs: move LLMs UI to page outline by @chenjiahan in https://github.com/web-infra-dev/rspack/pull/15341
* docs: reorganize plugin documentation by @chenjiahan in https://github.com/web-infra-dev/rspack/pull/15347
###### Other Changes
* chore(deps): migrate to @rstackjs/doc-ui v1.14.9 by @chenjiahan in https://github.com/web-infra-dev/rspack/pull/15349

##### New Contributors
* @CoderSerio made their first contribution in https://github.com/web-infra-dev/rspack/pull/15334

**Full Changelog**: https://github.com/web-infra-dev/rspack/compare/v2.2.0...v2.2.1