Highlights

rspackFuture.disableTransformByDefault

Default transformation was a default strategy for transform introduced v0.1.x. This introduced ton of problems during our daily development. For example, excluding node_modules for certain libraries are not supported, thus, which results in some mis-transformations. From now on, you can opt-in experiments.rspackFuture.disableTransformByDefault = true to disable the internal transformations. This greatly aligns Rspack with Webpack architecture. By enabling this option, these few options are not able to use anymore:

• builtins.react
• builtins.pluginImport
• builtins.emotion
• builtins.relay
• bulitins.presetEnv
• builtins.decorator
• target: target is now only supported to transform runtime code generated by Rspack, please refer to builtin:swc-loader for user code transformation for Rspack.

Builtin types(Rule.type) are removed in favor of webpack's web-standard bundling:

• jsx, jsx/auto, jsx/esm, jsx/dynamic
• ts, tsx

We will come up a new strategy to add back these DX friendly features in the future. Instead, builtin:swc-loader is added for fine-grained transformation. Please refer to this guide for the migration and details.

react-refresh migration

In this version, we'd like to introduce a better way to enable react fast refresh with @rspack/plugin-react-refresh, which is more powerful and flexible than builtins.react.refresh = true, now you can use it with builtin:swc-loader, swc-loader, or babel-loader. Checkout docs for more details

Deprecating builtin:sass-loader

builtin:sass-loader is deprecated in favor of sass-loader. You can still use it in this and the next minor version. It will be officially removed in v0.5.0. See this for our deprecation stages.

Optimize the progress bar style

• Thinner and shorter lines
• Removed progress text
• Green color

Preview:

https://github.com/web-infra-dev/rspack/assets/7237365/b11fd939-560d-4a47-83c3-f81a136bae3d

What's Changed

Something

Performance Improvements ⚡

• perf: remove panic_hook by @h-a-n-a in https://github.com/web-infra-dev/rspack/pull/4210
• perf: parallelize swc js minify by @h-a-n-a in https://github.com/web-infra-dev/rspack/pull/4213

Exciting New Features 🎉

• feat(rspack_core): oxc_resolver v0.2.0 by @Boshen in https://github.com/web-infra-dev/rspack/pull/4192
• feat: support disabling default transformation by @h-a-n-a in https://github.com/web-infra-dev/rspack/pull/4054
• feat(progress): optimize the progress bar style by @chenjiahan in https://github.com/web-infra-dev/rspack/pull/4197
• feat: disableReactRefreshByDefault future flag by @ahabhgk in https://github.com/web-infra-dev/rspack/pull/4196
• feat: export HMR plugin by @ahabhgk in https://github.com/web-infra-dev/rspack/pull/4199
• feat: deprecate builtin:sass-loader by @h-a-n-a in https://github.com/web-infra-dev/rspack/pull/4226
• feat: support output.hotUpdateGlobal by @ahabhgk in https://github.com/web-infra-dev/rspack/pull/4227
• feat: add side effects detect by @IWANABETHATGUY in https://github.com/web-infra-dev/rspack/pull/4215
• feat: builtin:react-refresh-loader by @ahabhgk in https://github.com/web-infra-dev/rspack/pull/4230
• feat: support include and exclude of react-refresh-rspack-plugin by @h-a-n-a in https://github.com/web-infra-dev/rspack/pull/4233
• feat: support object external item value by @ahabhgk in https://github.com/web-infra-dev/rspack/pull/4234

Bug Fixes 🐞

• fix: shouldn't always apply react refresh plugin by @ahabhgk in https://github.com/web-infra-dev/rspack/pull/4194
• fix: fix module source-map by @h-a-n-a in https://github.com/web-infra-dev/rspack/pull/4200
• fix: remove react from rspackExperiments of builtin:swc-loader by @h-a-n-a in https://github.com/web-infra-dev/rspack/pull/4221
• fix: merge disableReactRefreshByDefault to disableTransformByDefault by @ahabhgk in https://github.com/web-infra-dev/rspack/pull/4220
• fix: missing rspack-only plugins on compiler.webpack by @ahabhgk in https://github.com/web-infra-dev/rspack/pull/4223
• fix: filter export imported specifier used name . by @IWANABETHATGUY in https://github.com/web-infra-dev/rspack/pull/4229
• fix: fix react-refresh self is not defined by @h-a-n-a in https://github.com/web-infra-dev/rspack/pull/4232
• fix: react refresh test windows failed by @ahabhgk in https://github.com/web-infra-dev/rspack/pull/4242
• fix: avoid double react refresh transform in rspack-dev-server by @ahabhgk in https://github.com/web-infra-dev/rspack/pull/4243
• fix: passing option as &str caused memory leak in builtin:swc-loader by @h-a-n-a in https://github.com/web-infra-dev/rspack/pull/4235
• fix(chore): fix node path compatible problem & add express example by @hardfist in https://github.com/web-infra-dev/rspack/pull/4248
• fix: $RefreshReg$ is not defined error in node_modules by @ahabhgk in https://github.com/web-infra-dev/rspack/pull/4251

Other Changes

• chore: 🤖 generat webpack based tree shaking test snapshot. by @IWANABETHATGUY in https://github.com/web-infra-dev/rspack/pull/4186
• refactor: public path runtime module by @underfin in https://github.com/web-infra-dev/rspack/pull/4193
• style(rspack_plugin_progress): Change the formatting style to match WebpackBar by @Hamzakh777 in https://github.com/web-infra-dev/rspack/pull/4201
• test: pass more tree shaking test case by @IWANABETHATGUY in https://github.com/web-infra-dev/rspack/pull/4191
• chore: more tree shaking test2 by @IWANABETHATGUY in https://github.com/web-infra-dev/rspack/pull/4208
• refactor: change method on ExportsInfoId align to webpack by @IWANABETHATGUY in https://github.com/web-infra-dev/rspack/pull/4209
• chore: fix example dep by @h-a-n-a in https://github.com/web-infra-dev/rspack/pull/4218
• chore: fix example-emotion by @h-a-n-a in https://github.com/web-infra-dev/rspack/pull/4222
• chore: worklet example & express example by @hardfist in https://github.com/web-infra-dev/rspack/pull/4237
• chore: add builtins.react/... only works for transformByDefault tip by @9aoy in https://github.com/web-infra-dev/rspack/pull/4249
• chore: fix lockfile by @h-a-n-a in https://github.com/web-infra-dev/rspack/pull/4252

Full Changelog: https://github.com/web-infra-dev/rspack/compare/v0.3.4...v0.3.5