web-infra-dev/rspack v2.1.4

on GitHub

Highlights

Fine-grained import.meta parser options

module.parser.javascript.importMeta now accepts an object so each known import.meta property can be configured independently, on top of the existing true / false / 'preserve-unknown' values. Properties set to false are preserved for runtime evaluation, omitted properties keep their default behavior, and unknown properties are preserved. Both webpack-compatible keys (dirname, filename, main, url, webpack, webpackContext) and Rspack-specific keys (rspackHash, rspackPublicPath, glob, ...) are supported.

export default {
  module: {
    parser: {
      javascript: {
        importMeta: {
          // keep `import.meta.url` for runtime evaluation
          url: false,
          // keep the compile-time replacement of `import.meta.webpack`
          webpack: true,
        },
      },
    },
  },
};

Static worker URL output

module.parser.javascript.worker now accepts an object form with alias and url, alongside the existing boolean and string[] forms. With url: 'new-url-relative' and output.module enabled, Rspack emits a static new URL() expression for new Worker(new URL(..., import.meta.url)) instead of runtime code, honoring output.publicPath and output.workerPublicPath.

export default {
  output: {
    module: true,
    chunkFilename: '[name].bundle.js',
  },
  module: {
    parser: {
      javascript: {
        worker: {
          url: 'new-url-relative',
        },
      },
    },
  },
};

new Worker(new URL('./worker.js', import.meta.url));

// would become 👇
new Worker(new URL('./worker.bundle.js', import.meta.url));

What's Changed

New Features 🎉

• feat(runtime): support logical assignment for chunk loading global by @fireairforce in #14655
• feat: support persistent cache for module hashes by @ahabhgk in #14717
• feat: support static worker new URL output by @intellild in #14728
• feat: support fine-grained import.meta parser options by @intellild in #14631

Performance 🚀

• perf(swc): enable parallel wasmtime compilation by @hardfist in #14716
• perf(hook): reduce hook macro expansion size and optimize performance by @intellild in #14633
• perf: optimize ESM linking passes by @JSerFeng in #14758
• perf: deduplicate repeated dynamic reexport code by @JSerFeng in #14748

Bug Fixes 🐞

• fix(ci): pick binary-size base by build-triggering commit by @stormslowly in #14715
• fix: clean up runtime global rendering by @LingyuCoder in #14735
• fix(binding): clean up chunk wrappers when compiler is GCed by @SyMind in #14736
• fix: enable runtime mode esm context imports by @LingyuCoder in #14740
• fix: revert Module Federation runtime identifiers by @LingyuCoder in #14761
• fix(fs): include paths in native filesystem errors by @hardfist in #14760
• fix: respect RSPACK_BINDING in loader workers by @hardfist in #14775
• fix: invalidate the target compiler for lazy compilation by @Kanary-channelio in #14781

Refactor 🔨

• refactor(binding): avoid unsafe compilation access in chunk and module by @SyMind in #14671
• refactor: avoid runtime module iife in rspack mode by @LingyuCoder in #14700
• refactor: colocate rspack runtime lexical globals by @LingyuCoder in #14703
• refactor: rename empty context helpers by @LingyuCoder in #14733
• refactor(cli): use @rstackjs/load-config by @chenjiahan in #14738
• refactor: use rspack runtime identifiers by @LingyuCoder in #14739
• refactor: unify runtime globals render modes by @LingyuCoder in #14762

Other Changes

• chore(ci): surface Windows Defender status after disable attempt by @stormslowly in #14711
• chore(ci): read binary-size data via authenticated API by @stormslowly in #14730
• chore(deps): update patch npm dependencies by @renovate[bot] in #14751
• chore(deps): update dependency @rslint/core to v0.6.5 by @renovate[bot] in #14749
• chore(deps): update dependency @module-federation/runtime-tools to v2.7.0 by @renovate[bot] in #14752
• chore(deps): update dependency webpack-sources to v3.5.1 by @renovate[bot] in #14750
• revert: "feat: support persistent cache for module hashes" by @ahabhgk in #14763

New Contributors

• @Kanary-channelio made their first contribution in #14781

Full Changelog: v2.1.3...v2.1.4